Liquid Instruments Knowledge Base

Using Moku with a static IP address

Published December 22nd, 2020 by Paul Cracknell

How can I configure my Moku to use a fixed (static) IP address? Each Moku device can be configured the use a fixed, or static, IP address. iPad At the "Select your Device" screen, tap the Moku and then tap the cogwheel item. On the Device Settings, under the WiFi or Ethernet tabs, select "manual" and enter the required IP address. Desktop App (Windo

Using the Frequency Response analyzer to measure inductance

Published December 22nd, 2020 by Paul Cracknell

The Moku:Lab's Frequency Response Analyzer provides a simple and accurate way to measure the response of an inductor over frequency. The below application note covers this topic, including capturing the response data to a CSV file and plotting the impedance versus frequency then comparing it to the component data-sheet A guide to measuring impedance

Using Python to generate arbitrary waveforms while observing the output signal

Published December 22nd, 2020 by Paul Cracknell

Python implementation of Arbitrary Waveform Generator and oscilloscope Moku:Lab's Arbitrary Waveform Generator (AWG) can be deployed within Python to drive output signals. At the same time, the Python AWG can be used as an oscilloscope to view the output signal. In order to do so, you would need to loop back output 1 to input 1. This is implemented

How to connect my Moku:Lab to a WiFi network for the first time

Published December 22nd, 2020 by Paul Cracknell

Initial set up of Moku:Lab WiFi connection When your Moku:Lab is powered on for the first time, it will be in its factory default state - it will broadcast a Wireless Access Point and Ethernet will be enabled. To configure your Moku:Lab to join an existing network, we recommend using our iPad app for the setup process. Join the Moku:Lab's Wireless A

Synchronize the phase of Waveform generator channels

Published June 8th, 2023 by Paul Cracknell

The Waveform generator channels can be phase synchronized by selecting the toolbox icon → “Sync phase”. This applies to the Moku:Go, Moku:Lab and Moku:Pro, both in the Waveform Generator, Arbitrary Waveform Generator instrument and the waveform generator built-in to the Oscilloscope instrument.

What is the main difference between the Moku Oscilloscope and the Data Logger instruments?

Published December 22nd, 2020 by Paul Cracknell

Moku's Oscilloscope is primarily used to capture snapshots of fast signals and transient waveforms. The instrument captures and displays a segment of the data once it's triggered. You can capture very fast features, but the data traces between snapshots are not continuous. The maximum sampling rate for Moku:Go's Oscilloscope is 125 MSa/s, Moku:Lab's

What if Moku:Lab fails to start?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab does not turn on; factory or hard reset If Moku:Lab fails to start or boot correctly, it will show a steady orange LED on the power switch for more than 2 minutes after power up. If this is so, you will need to perform a Hard Reset as explained here.

Do you need internet access to use your Moku?

Published December 22nd, 2020 by Paul Cracknell

Once you install the Moku: app on the iPad or PC, internet access is optional. You can use your Moku device wirelessly, or with wired ethernet on a local network. Some cloud-based features, such as upload data to Dropbox, require the internet. If more restricted rules apply to your organization, Moku can also be used through a USB connection. Detai

MATLAB datalogger and saving the logfile

Published December 22nd, 2020 by Paul Cracknell

How do I access the log file from MATLAB The Moku:Lab's Datalogger can be configured and launched from within a MATLAB script. Once the log file is captured it can be downloaded over the network to the MATLAB PC for local analysis. This MATLAB script is an example of how to create and download the log file remotely. %% Basic Datalogger Example % % T

Can I log to the SD card ?

Published December 22nd, 2020 by Paul Cracknell

Logging data to the SD card Moku:Lab has one SD card slot on the rear panel and each Moku:Lab is supplied with one 16 GB class 10 SD card. Most of the instruments have logging functions and permit logging to the SD card. Ensure the SD card is "FAT32" format; the maximum file size is 4 GB. We recommend a class 10; SD-HC I or better card.

How does Moku:Lab's Laser Lock Box apply gain to the input?

Published December 22nd, 2020 by Paul Cracknell

The +24 dB and +48 dB input gain on Moku:Lab is implemented purely digitally. It is designed to reduce quantization error when the FPGA performs the calculation. We recommend using the maximum possible input gain that does not saturate the input signal. Please note the built-in probe points have a fixed bit depth. The quantization error may be exagg

Python: Spectrum Analyzer (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Spectrum Analyzer (plotting) This example Python script shows how to setup Moku:Lab's Spectrum Analyzer instrument and how to plot the data in real time. This example is not compatible with Moku:Go or Moku:Pro. # # pymoku example: Plotting Spectrum Analyzer # # This example demonstrates how you can configure th

What is causing the latency in my Moku:Lab measurement when using APIs?

Published December 22nd, 2020 by Paul Cracknell

Discussion of latency due to network connections : Python, MATLAB and LabVIEW When using the various APIs, there are various sources that can contribute to latency collection from a Moku:Lab, such as network condition, data packet size, and local host computer processing environment. As Moku:Labs are network connected, data collection is strongly de

Python: Frequency Response Analyzer (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Frequency Response Analyzer (plotting) # pymoku example: Plotting Frequency Response Analyzer # # This example demonstrates how you can generate output sweeps using the # Frequency Response Analyzer instrument, and view transfer function data in # real-time. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymo

Getting started using MATLAB with Moku:Lab

Published December 22nd, 2020 by Paul Cracknell

MATLAB getting started Our MATLAB integration fuses Moku hardware with the computational power of MATLAB. Configure instrument parameters, perform automated data analysis, and generate real-time animations of experimental data, directly from MATLAB. For my information, please visit our API reference page. For MATLAB 2015+ Download Moku:Lab's MATLAB

What version of iOS / iPadOS do I need?

Published December 22nd, 2020 by Paul Cracknell

iOS / iPadOS requirements for Moku:Lab iPad app The minimum iOS version requirement for the Moku:Lab App is iOS 9.0.

How does Moku:Lab calculate Allan Deviation?

Published December 22nd, 2020 by Paul Cracknell

We have published an application note explaining the Phasemeter's calculations of Allan Deviation Measuring Allan Deviation : A Guide to Allan Deviation with Moku:Lab's Phasemeter

Can I change the color of the traces?

Published December 22nd, 2020 by Paul Cracknell

Yes, you can! To change the color of each trace, tap the menu icon ->"Preferences" -> tap on the color that you wish to change and select from the available colors.

How to factory reset Moku:Lab

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab must be plugged in and powered on to perform a Factory Reset. You can return your Moku:Lab to its default network and configuration settings by pressing the Factory Reset button with a paper-clip or small object on the underside of the device for two seconds. The status LEDs on the power button will cycle through different colors as your Mo

How to improve the resolution bandwidth in spectrum analyzer?

Published December 22nd, 2020 by Paul Cracknell

The minimum resolution bandwidth (RBW) is correlated with the measurement span. The narrower the span, the finer the minimum RBW. To get the best RBW, please monitor the signal with the minimal spectrum range.

Can I deploy more than one instrument on the same Moku:Lab device?

Published December 22nd, 2020 by Paul Cracknell

Sequential instrument deployment in MATLAB You can run multiple instruments with the same Moku:Lab in sequence, but it is not possible to do so at the same time. To deploy a new instrument, simply connect to the Moku:Lab with a new instrument: %% Sequential Instrument Deploy Example % % This example demonstrates how you can deploy the Oscilloscope i

WiFi is not permitted in our lab. How can I use Moku:Lab and iPad

Published December 22nd, 2020 by Paul Cracknell

How to disable wifi. Moku:Lab's 'airplane' mode. In some places, WiFi networks are not permitted for either security or interference reasons. However, you can still use Moku:Lab fully. Disabling Wifi in Moku:Lab EITHER, on the bottom of the Moku:Lab; there is an ‘airplane’ mode button. Depress this recessed button with a paperclip or similar and the

Does Moku:Lab reference to earth ground or it has floating ground?

Published December 22nd, 2020 by Paul Cracknell

The connectors (outer shields) of the input and output BNC ports are connected to the power supply's ground. Moku:Lab is referenced to earth ground when it's plugged into a three-pronged outlet.

Can I measure the phase or frequency difference between the two input channels?

Published December 22nd, 2020 by Paul Cracknell

Yes! When both input channels are enabled, a Delta channel with the difference between Channel 1 and Channel 2 automatically appears. You can also plot the Delta channel alongside Channels 1 and 2 in the Timeseries and Spectral Analysis plots by selecting the Δ icon (color-coded orange).

Spectrum Analyzer units of measure

Published February 26th, 2021 by Paul Cracknell

The Moku:Lab Spectrum Analyzer can display the spectrum amplitude in various units (dBm, Vrms, Vpp and dBV). Additionally, you can select corresponding power spectral density (PSD) units (dBm/Hz, Vrms/√ Hz, Vpp/√Hz and dBV/√ Hz). It is worth noting that the Resolution Band Width (RBW) setting only affects the measurement in PSD units. Below is an

Python: IIR Filter Box (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the IIR Filter Box (plotting) # pymoku example: Plotting IIR Filter Box # # This example demonstrates how you can configure the IIR Filter instrument, # configure real-time monitoring of the input and output signals. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import

What do all the ports do on the Moku:Lab?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab; front and rear panel; ports and interfaces Moku:Lab front side layout: From left to right: Two analog inputs (BNC): signal input channels Power button / status LED: powers on or off the Moku:Lab, indicating the status of the Moku:Lab (for more information, check out how to turn on the Moku:Lab here and find out more on the status LED here)

Moku:Lab's Laser Lock Box : When and how should I use the slow PID controller?

Published December 22nd, 2020 by Paul Cracknell

When stabilizing lasers, it is common to need to provide feedback control loops to multiple actuators. A common situation involves one fast actuator with limited range (e.g. current or piezo); and one slow actuator with a much larger range (e.g. temperature). The slow PID controller acts on the fast PID controller’s output, keeping it centered aroun

If Moku:Lab only has two output channels, how is it possible to generate feedback control signals as well as the modulation tone and scanning waveform?

Published December 22nd, 2020 by Paul Cracknell

The low-bandwidth control signal on output channel 2 can be separated electronically from the high-frequency modulation tone using an external bias-tee (not included with Moku:Lab). An appropriate bias-tee can be purchased from Mini-Circuits. The scanning waveform is typically applied to the same actuator as the high-bandwidth control signal, so no

How to install the Moku:Lab iPad App

Published December 22nd, 2020 by Paul Cracknell

Installing the iPad Moku:Lab app Open the App Store on your iPad. Search for the Moku:Lab application and verify that the publisher is Liquid Instruments. Download and Install Moku:Lab on your iPad.

Is Moku:Lab calibrated?

Published December 22nd, 2020 by Paul Cracknell

Your options for Moku:Lab calibration Each Moku:Lab is calibrated at the factory by a Liquid Instruments-approved process to ensure each instrument meets the design specifications. Liquid Instruments has also partnered with Tektronix to offer optional ISO/IEC 17025 NIST traceable calibration. Contact us for more information. You can also contact Tek

MATLAB: Data Logger (streaming)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Data Logger (streaming) %% Livestream Datalogger Example % % This example demonstrates how you can use the Datalogger to live-stream % dual-channel voltage data over the network. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address: ', 's'); % Con

Phase synchronization of output signals across multiple Moku:Labs

Published July 13th, 2021 by Paul Cracknell

There are 2 output channels on Moku:Lab, however, if you would like to generate signals (with synchronized phase) in more than 2 channels, you can connect up multiple Moku:Labs to achieve this. The generated signal is synchronized by triggering the Waveform Generator with the same output signal from the Oscilloscope. This is a step by step guide to

Python: FIR Filter Box

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the FIR Filter Box # pymoku example: Basic FIR Filter Box # # This example demonstrates how to run the FIR Filter Box and configure its # individual filter channel coefficients. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import FIRFilter # The following two example a

How much current can Moku:Lab source and sink?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab is able to source and sink 20 mA. The output amplifiers in particular is capable of sourcing and sinking 100 mA.

How do I install LabVIEW integration?

Published December 22nd, 2020 by Paul Cracknell

Download the package from the LabVIEW integration page and double-click to begin the installation process. Note: You may need to install and open the VI package manager first from JKI. Once installed, a panel entitled “Moku:Lab” will be available in your functions palette the next time LabVIEW starts. We also have an article on "Getting Started with

100:1 High Voltage probe

Published February 26th, 2021 by Paul Cracknell

100:1 probes are commonly used to measure higher voltages. Such probes have a 100 MΩ impedance and thus divide the measured voltage by a factor of 100 when used with Moku:Lab's 1 MΩ inputs. This enables Moku:Lab, with its +/- 5V input range, to measure much higher voltages. Moku:Lab's Oscilloscope incorporates a probe scale factor to display the me

MATLAB: Laser Lock Box (basic)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Laser Lock Box (basic) %% Basic Laser Lock Box Example % % This example demonstrates how you can configure the laser lock box % instrument. % % (c) 2018 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address: ', 's'); % Connect to your Moku and deploy the desire

What measurements can the Oscilloscope make?

Published December 22nd, 2020 by Paul Cracknell

The Oscilloscope is capable of making a wide range of measurements on both input channels and also the math channel. Tap the tape measure icon to add a measurement, then tap and hold a measurement to configure. Measurements include: Frequency, Period, Duty Cycle, Pulse Width, Negative Width, Mean, RMS, Cycle Mean, Cycle RMS, Standard Deviation, Peak

How does the PID control matrix work?

Published December 22nd, 2020 by Paul Cracknell

The control matrix combines, rescales, and redistributes the input signal to the two independent PID controllers, FIR filters or digital filters. The output vector is the product of the control matrix multiplied by the input vector.

Can I adjust the corner frequency of the low-pass filter?

Published December 22nd, 2020 by Paul Cracknell

Yes! The low-pass filter corner frequency can be tuned from 1 kHz to 14 MHz. You can also select different filter types including Butterworth, Chebyshev I & II, Elliptic, Cascaded, Bessel, Gaussian and Legendre to notch troublesome resonances.

Remote access to Moku:Lab data logs

Published December 22nd, 2020 by Paul Cracknell

How can I remotely access Moku:Lab's datalogs? Many of Moku:Labs instruments can log data to either the internal memory or to an SD card in the rear SD slot of Moku:Lab. These files can be upload to DropBox for easy file sharing; but they can also be accessed over a local area network. If your Moku is on a local network you can access the files in a

Probe selection for Moku:Lab

Published July 13th, 2021 by Paul Cracknell

Selecting an appropriate probe is an important part of an accurate and efficient measurement system. Moku:Lab is compatible with a wide variety of probes and below is some guideline specification to assist in selecting a passive voltage probe for use with Moku:Lab Probe type Passive voltage Attenuation 1x, 10x or switchable 1x / 10x Bandwidth >

Moku:Lab is hot

Published April 7th, 2021 by Paul Cracknell

Moku:Lab can consume 20W and has both passive (heatsink) and active (fan) cooling. During use, ensure that the rear fan outlet, located immediately above the SDcard slot, is free of obstructions. Moku:Lab's metal casing also serves to cool the electronics and will get hot during use, up to 45C (25C above ambient of 20C). This is entirely normal

How to change the name of a Moku:Lab?

Published December 22nd, 2020 by Paul Cracknell

Identify Moku:Lab by name Giving each Moku:Lab a unique name is especially useful when there are multiple Moku:Labs on the same network, so you can easily identify to which Moku:Lab you are connecting. You can set or change the name of your Moku:Lab through our iPad App and Windows App. iPad App Launch the iPad App. Tap on the Moku:Lab you would lik

How do I turn on Moku:Lab?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab power button After connecting the power adaptor to an outlet and to the rear of Moku:Lab, ensure you push and HOLD the front panel Liquid Instruments logo button until the front LED is orange (approx 2 seconds). Moku:Lab will now boot up. Once the LED turns white/blue (approx 1 minute), Moku:Lab is ready to use.

Waveform generator and Amplitude Modulation

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Waveform Generator and Amplitude Modulation Moku:Lab's Waveform generator instrument is a flexible function generator capable of Amplitude, Frequency or Phase modulation (AM, FM or PM) Here we see the Waveform Generator setup with a 8.31 kHz carrier on channel 1, with modulation source set to an internally generated signal; the source is

How do I adjust the sensitivity of the Lock-In Amplifier?

Published December 22nd, 2020 by Paul Cracknell

Unlike some lock-in amplifiers, Moku:Lab's Lock-in Amplifier does not have a sensitivity setting. Instead, you can adjust the output gain to achieve a similar effect. Sensitivity determines how the lock-in amplifier maps the input level to the output level. For example, a 1 mVpp sinusoidal signal is mapped to a 0.25 mV DC signal at the output, assum

How do I locate my Moku in a lab with many Mokus?

Published December 22nd, 2020 by Paul Cracknell

How to find a specific Moku within a lab In a lab with several Mokus, it is possible to lose track of which Moku you are controlling on the iPad. The colored LEDs on Moku:Lab and Moku:Pro make device identification easy. Go to "select your device". Each Moku on your local network will be displayed outlined with a colored circle with the color matchi

Are the Moku:Labs protected from over voltage ?

Published December 22nd, 2020 by Paul Cracknell

Over voltage protection on inputs, what is the maximum input voltage? The maximum voltage range for the Moku:Lab inputs is ± 5 volts. Moku:Lab has input protection to reduce the chances of accidental damage. Each input has a sensing circuit that protects it from over voltage events. If a voltage beyond ±7.5 V is present then the inputs will be disco

How can I upload custom waveforms from the iPad?

Published December 22nd, 2020 by Paul Cracknell

Custom waveform upload to Moku:Lab's Arbitrary Waveform Generator You can load custom (arbitrary) waveforms from your iPad’s clipboard, the “Files app”, or choose from files saved directly on Moku:Lab’s SD card. Files formatted with comma- or newline-delimited text are supported.

External reference clock

Published February 4th, 2022 by Paul Cracknell

Moku:Pro has the ability to supply an external 10 MHz reference clock to other test and measurement device. It also has an external reference clock input, which allows the Moku:Pro to lock to an external 10 MHz reference provided by another Moku or other test and measurement equipment. The reference clock input and output are on the rear panel. Mok

How do I ensure that I have the latest iPad app software?

Published December 22nd, 2020 by Paul Cracknell

To ensure you have the most recent version of the iPad app, simply go to the App Store and download any available updates. The App Store will always have the latest iPad software and include the most up-to-date instruments for the Moku:Lab.

Can I adjust amplitude of Moku:Labs output reference clock ?

Published December 22nd, 2020 by Paul Cracknell

Moku:Labs output reference clock at 10MHz Moku:Lab provides a reference clock output on the rear panel. This can be used to synchronize to other items of lab test and measurement equipment. This clock output is fixed at 10 MHz, -3 dBm (50ohms) or 500 mVpp. However, many of our instruments (Oscilloscope, Phasemeter, Datalogger, Phasemeter, Spectrum

How does Moku:Lab calculate the Power Spectral Density?

Published December 22nd, 2020 by Paul Cracknell

In Moku:Lab's Phasemeter, Power Spectral Density (PSD) and the Amplitude Spectral Density (ASD) are calculated in the iPad App using Welch’s method of overlapping periodograms with a 50% overlap and a Hanning window. The number of points is either 512, 1024, or 2048 depending on the sampling rate chosen.

How much does Moku:Lab cost?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's hardware comes automatically equipped with 5 instruments (Oscilloscope, Arbitrary Waveform Generator, Spectrum Analyzer, Waveform Generator, and Data Logger) for $3,500. For $9,990, you receive the full suite of 12 instruments plus all future instruments. The pricing for individual add-on instruments including the Phasemeter, Lock-in Ampl

What's the difference between Moku:Lab phasemeter and a frequency counter?

Published December 22nd, 2020 by Paul Cracknell

A frequency counter counts the number of cycles of a signal within a given time window. It calculates the frequency of the signal based on the number of counts and gating time. Moku:Lab phasemeter implements a digital phase-locked loop (PLL) structure. It calculates the frequency based on the initial or previous frequency of a local oscillator (LO),

MATLAB: Data Logger (basic)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Data Logger (basic) %% Basic Datalogger Example % % This example demonstrates use of the Datalogger instrument to log % time-series voltage data to a (Binary or CSV) file. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address: ', 's'); % Connect to

Can I control multiple Moku:Labs in the Windows App?

Published December 22nd, 2020 by Paul Cracknell

More than one Moku controlled by one PC Yes! You can add more Moku:Labs by adding new tabs in the Windows App, each tab will control one Moku:Lab independently. Watch us control many Mokus running different instruments all from one app

How to change the phase of the demodulation signal in PyMoku Lock-In Amplifier

Published July 13th, 2021 by Paul Cracknell

Moku:Lab Lock-In Amplifier uses dual-phase demodulation to determine the X and Y components of a signal. The phase of the demodulation signal can be shifted in Pymoku by adjusting the demodulation signal properties. This example demonstrates how the demodulation signal can be adjusted. from pymoku import Moku from pymoku.instruments import LockInAmp

What file formats does the Moku:Lab Arbitrary Waveform Generator support ?

Published December 22nd, 2020 by Paul Cracknell

The Moku:Lab's Arbitrary Waveform Generator can upload files from SD card, MyFiles or the iPad's clipboard in a comma- or newline- delimited text. The text values will be normalized to a range of -1 -> +1; then scaled to the desired amplitude and offset.

Power supply for Moku:Lab

Published July 13th, 2021 by Paul Cracknell

Moku:Lab power supply is 12v, 20W typical and up to 30W when charging an external device via the USB type A port. Moku:Lab is supplied with a 100-240V power module, model CINCON Electronics TRG45A120, rated at 45W. This provides the 12v DC via a 5.5mm DC jack, centre positive.

Moku LED color status

Published December 22nd, 2020 by Paul Cracknell

Once your Moku is fully booted, the LEDs on the front of the device represents the current network status or power status. Moku:Go There is only one LED on Moku:Go and there is no power button. Moku:Go should power on automatically once the magnetic power adapter is connected. The LED colors on Moku:Go indicate the power status and the firmware upda

MATLAB: Phasemeter (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Phasemeter (plotting) %% Plotting Phasemeter Example % % This example demonstrates how you can configure the Phasemeter instrument % and stream dual-channel samples of the form [fs, f, count, phase, I, Q]. % The signal amplitude is calculated using these samples, and plotted for % real-time viewing. % % (c) 201

Can I add an offset to the oscillator or scan output in laser lock box?

Published July 13th, 2021 by Paul Cracknell

The output offset affects both the PID and scan/oscillator output. Offsets to the oscillator and scan signal can be added through the output offset.

Moku:Lab brochure and full specifications

Published December 22nd, 2020 by Paul Cracknell

Can I download a brochure or flyer for Moku:Lab? Moku:Lab's brochure is here Moku:Lab's full hardware and instrument specifications are here

Can I adjust the corner frequency of the low-pass filter?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab Laser Lock filter filter configuration Yes! The low-pass filter corner frequency can be tuned from 1 kHz to 14 MHz. You can also select different filter types including Butterworth, Chebyshev I & II, Elliptic, Cascaded, Bessel, Gaussian and Legendre to notch troublesome resonances.

How to connect my Moku:Lab to a Windows PC through direct Ethernet cable

Published December 22nd, 2020 by Paul Cracknell

Direct Ethernet connection without a router or switch To connect your Moku:Lab to a Windows PC through Ethernet cable without a router or a switch, you will need to configure the network and assign the Moku:Lab a static IP address. Configuring the PC network: In your PC go into "Settings" -> "Network & Internet" -> "Ethernet" Select "chang

I don't have an iPad. Can I still use Moku:Lab?

Published December 22nd, 2020 by Paul Cracknell

Alternatives to using Moku:Lab with iPad Yes! You can interact with Moku:Lab using Python, LabVIEW and MATLAB from any computer running Mac OS, Windows or Linux. Additionally, we now have a Windows App in beta. Find more information here: Windows

Getting started with LabVIEW and Moku:Lab

Published December 22nd, 2020 by Paul Cracknell

How do I install Moku:Lab APIs for LabVIEW? We have both a Quickstart guide and APIs ready to use. Download our complete QuickStart guide Download Moku:Lab's LabVIEW APIs

Returns

Published October 27th, 2021 by Paul Cracknell

We want you to be satisfied with your purchase. For equipment purchased directly from Liquid Instruments, you may return your undamaged Moku:Pro, Moku:Lab, or Moku:Go within 30-days of purchase for any reason. Equipment must be returned with original packaging and accessories or you may be charged a restocking fee. To initiate a return, please email

Python: Laser Lock Box

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Laser Lock Box # pymoku example: Basic Laser Lock Box # # This example demonstrates how you can configure the laser lock box # instrument # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import LaserLockBox from scipy import signal def gen_butterworth(corner_frequency)

Python: Lock-In Amplifier (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Oscilloscope # # pymoku example: Basic Oscilloscope # # This script demonstrates how to use the Oscilloscope instrument # to retrieve a single frame of dual-channel voltage data. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import Oscilloscope # Connect to your Mok

The Lock-in Amplifier can readout I and Q (X and Y). What about R and theta?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Lock-in Amplifier supports either I and Q (X and Y) or R and theta outputs. Tap "Rect" or "Polar" in the signal path to switch between the two options.

Loading recorded data in Excel

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab can save data in CSV format, which can be imported to Excel files for processing and calculations. If you have saved data in .LI binary format, you can use our file converter to convert the file into CSV or MAT format. Depending on settings, Excel may unexpectedly reduce the precision of your data during loading and calculations. Be sure to

Can Moku:Lab also create IIR filters?

Published December 22nd, 2020 by Paul Cracknell

While Moku:Lab's FIR Filter Builder instrument is used to design FIR filters, you can also use the Digital Filter Box instrument to create IIR filters.

Can I set the PID controller by Ki, Kp, and Kd?

Published July 13th, 2021 by Paul Cracknell

You can set the PID controller in with Ki, Kp, and Kd in the advanced mode. You can access the advanced mode by tapping the 'advanced mode' button, located in the bottom right corner of the PID controller configuration. In the advanced mode, you can build a two-section PID and configure each section by Ki, Kp, and Kd. Each section can be individuall

All of my lab computers run Windows. Will I need to change them all to Mac OS?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab is fully accessible on Windows! The native Windows app (beta) is now available here: Windows app We also offer full API integration with Python, LabVIEW, and MATLAB. Use our Python, LabVIEW, and MATLAB libraries to integrate Moku:Lab into your Windows-based experiment control system. In addition, you can use the iPad interface with Moku:Lab

MATLAB: IIR Filter Box

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the IIR Filter Box (basic). %% Basic IIR Filter Box % % This example demonstrates how you can generate Chebyshev filter % coefficients to configure the IIR Filter Box. It also shows how to % retrieve signal monitor data. % % NOTE: This example requires installation of the MATLAB Signal Processing % Toolbox to gener

How do I export measured data from my Moku?

Published December 22nd, 2020 by Paul Cracknell

Saving and Sharing Data When using Moku's Oscilloscope, Spectrum Analyzer, or any instrument with an embedded oscilloscope, you can export data to multiple locations using our iPad App or Windows/macOS App. To export a frame of data that is displayed, tap or click the icon (located at the top center of the window), then save the desired file types

Moku:Lab's spectrum analyzer 3-D timeseries

Published December 22nd, 2020 by Paul Cracknell

How do I visualize the time-series of the spectrum ? Moku:Lab's Spectrum Analyzer has a unique time-series 'waterfall' view. Touch and hold on the main spectrum analyzer display and select 'Waterfall view'.

Python: Phasemeter

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Phasemeter (logging) # # pymoku example: Phasemeter data logging # # This example demonstrates how you can configure the Phasemeter instrument # and log single-channel phase and [I,Q] data to a CSV file for a 10 # second duration. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku, StreamExcept

MATLAB: Lock-in Amplifier

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Lock-in Amplifier (basic) %% Basic Lock-in Amplifier Example % % This example demonstrates how you can configure the lock-in amplifier % instrument. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address: ', 's'); % Connect to your Moku and deploy t

Python: Waveform generator (modulation)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Waveform Generator with modulation # # pymoku example: Waveform Generator Modulation # # This example demonstrates how you can use the Waveform Generator instrument # to generate an amplitude modulated sinewave on Channel 1, and a frequency # modulated squarewave on Channel 2. # # (c) 2019 Liquid Instruments Pt

Can I turn off WiFi in Moku:Pro ?

Published June 29th, 2021 by Paul Cracknell

In some lab environments, it is important to disable the WiFi connectivity in Moku:Pro. With WiFi disabled, you can connect to and control the Moku:Pro via wired ethernet or USB-C. WiFi can be disabled in two ways : 1. Airplane mode : On the rear panel, press the recessed airplane mode button 2. In the Moku app : Disable both "Join a WiFi netw

How much can you control with the APIs?

Published December 22nd, 2020 by Paul Cracknell

(Deep level instrument development or high level parameter control) The Python, MATLAB, and LabVIEW APIs provide full controls over the instruments' parameters in a similar manner to the iPad interface or many other lab test and measurement equipment.

What is the triggered sweep mode?

Published December 22nd, 2020 by Paul Cracknell

Waveform Generator sweep mode settings and trigger options In Triggered Sweep Mode, when a trigger is detected, waveform generation will begin at the Start frequency and sweep to the End frequency over a given duration. The Start frequency is set in the output waveform, the Stop frequency and duration are set in Modulation settings. The source of tr

How is the magnitude in dBm calculated in Moku:Lab’s Frequency Response Analyzer?

Published December 22nd, 2020 by Paul Cracknell

The Frequency Response Analyzer (FRA) provides response plots of magnitude and phase. While the phase is expressed in degrees, the magnitude is expressed in terms of dBm power. This is a log scale of power expressed in dB relative to 1 milliWatt. How is this magnitude in dBm calculated in Moku:Lab’s FRA? Let us take a simple example. We will set the

Can I set a lower corner frequency for the lowpass filter in the laser lock box?

Published July 12th, 2021 by Paul Cracknell

Moku:Lab laser lock box uses a 2-stage second-order IIR filter. In the iPad app, the filter defaults to 1-stage or 2-stage second-order filter only. As we have a limited number of bits during the calculation, this limited us to a ~1 kHz corner. In order to get a filter with a lower corner frequency, it is possible to manually load a 2-stage first-or

Does the Lock-in Amplifier include a PID controller for feedback applications?

Published December 22nd, 2020 by Paul Cracknell

Yes! A user-configurable PID controller is integrated into the Lock-in Amplifier signal processing chain. To enable the PID controller, tap the Configuration icon on the top right corner and you can add the PID controller to the main output or auxiliary output depending on your configuration.

MATLAB: Oscilloscope

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Oscilloscope (basic) %% Basic Oscilloscope Example % % This script demonstrates how to use the Oscilloscope instrument to % retrieve a single frame of dual-channel voltage data. % % (c) 2016 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address: ', 's'); % Conn

Python: Data Logger (streaming)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Data Logger (streaming) # pymoku example: Livestream Datalogger # # This example demonstrates how you can use the Datalogger to live-stream # dual-channel voltage data over the network. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku, StreamException from pymoku.instruments import Datalogger

Can you stream data to the computer for real-time calculations?

Published December 22nd, 2020 by Paul Cracknell

Streaming real time data You can stream real-time data over a wired or WiFi network directly to a PC. We have several examples of streaming from the Data Logger : Python : https://liquidinstruments.helpjuice.com/141109-python-examples/python:-data-logger-(streaming) MATLAB : https://liquidinstruments.helpjuice.com/141112-matlab-examples/matlab-data-

MATLAB: Phasemeter

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Phasemeter %% Phasemeter File Logging Example % % This example demonstrates how you can configure the Phasemeter instrument % and log single-channel phase and [I,Q] data to a CSV file for a 10 % second duration. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Mo

Moku warranty

Published October 27th, 2021 by Paul Cracknell

Moku:Pro, Moku:Lab, and Moku:Go come with a one year limited warranty. Liquid Instruments warrants that for a period of 12 months from supply these products: will materially comply with the relevant documentation we publish will meet the relevant minimum performance criteria we publish are free from defects in materials and workmanship. This warrant

Can I save instrument settings in the Windows App?

Published July 12th, 2021 by Paul Cracknell

Yes, you can! To save the current setting of the instrument, click the menu icon on the top left corner of the window, select Instrument -> Save/recall settings -> Save instrument state. You can also use keyboard shortcut Ctrl + S to save. You can reset your instrument to the saved state by clicking the menu icon on the top left corner of the

Can Moku:Lab's Lock-in Amplifier output a signal to drive a modulator?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab has two analog outputs. When using the Moku:Lab's Lock-in Anplifier, the output 1 is designated for the demodulated signal output (X, Y, R, or Theta). Output 2 can output either a demodulated signal (Y or Theta), the local oscillator, or an auxiliary oscillator signal. The auxiliary oscillator can be set to output a sinusoidal oscillator, f

How to connect to my Moku:Lab in the Windows App

Published December 22nd, 2020 by Paul Cracknell

For the Windows App to discover your Moku:Lab, the Moku:Lab needs to be connected to the same network as your computer; OR alternatively, connected via USB. Please check out our Knowledge Base articles under Moku:Lab general -> getting started with Moku:Lab to find out how to connect your Moku:Lab to an existing network. If you have connected you

How are the IIR filters implemented?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Digital Filter Box implements infinite impulse response (IIR) filters using four cascaded Direct Form I second-order stages with a final output gain stage. To specify a filter, you must supply a text file containing the filter coefficients. The file should have six coefficients per line, with each line representing a single stage. If outp

Where can I find the documentation for MATLAB APIs?

Published December 22nd, 2020 by Paul Cracknell

Once Moku:Lab APIs are installed, you can access the documentation by typing 'help moku' in the command window.

Can you do fringe-side locking with Moku:Lab's Laser Lock Box?

Published December 22nd, 2020 by Paul Cracknell

After the 1.9.7 update to the iPad app, the demodulation step can be bypassed in the laser lock box. The signal can be directly sent to the digital filter and PID controllers. This enables modulation-free locking techniques such as fringe-side locking.

MATLAB: Frequency Response Analyzer

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Frequency Response Analyzer %% Basic Frequency Response Analyzer Example % % This example demonstrates how you can generate a single output sweep on % the Frequency Response Analyzer instrument, and print the resulting transfer function % data. % % (c) Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip =

Phasemeter output waveform resolution

Published December 22nd, 2020 by Paul Cracknell

The Moku:Lab Phasemeter instrument can generate an output waveform. This waveform is generated by a NCO ('numerically controlled oscillator') with an internal Moku:Lab reference of 10 MHz. Over a long period, it is possible to observe a steady slow phase drift when comparing this output waveform with another signal. The precision of this output wave

Are there any LabVIEW examples available?

Published December 22nd, 2020 by Paul Cracknell

LabView instrument examples We have plenty of examples to help you get started using LabVIEW integration with Moku:Lab. LabVIEW installation instructions are here : https://liquidinstruments.com/software/labview/ Full examples can be viewed in LabVIEW by selecting “Find examples…” from the Help menu and scrolling to "Liquid Instruments"

When is the FIR preferred over the Digital Filter Box?

Published December 22nd, 2020 by Paul Cracknell

For many applications, the FIR and digital filter (IIR) can be used interchangeably. However, they do have a few key differences: FIR filters have a linear phase response. They create minimal signal distortions in the time domain. IIR filters are computationally inexpensive compared to FIR filters. The propagation delay is typically shorter. FIR fil

How does Moku:Lab's Lock-in Amplifier measure small signals with 12-bit ADCs?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab intelligently downsamples the input signal by averaging. The number of effective bits increases as the sampled ADC points are downsampled. For example, if the signal amplitude is 0.3 mV, but the least significant bit of the ADC is 1 mV, it would appear that the signal could not be detected. However, when the signal is digitized, time sequen

Can you generate a chirp with Moku:Lab's waveform generator?

Published December 22nd, 2020 by Paul Cracknell

Frequency chirp with Waveform Generator Moku:Lab's Waveform Generator can generate a chirp signal from 1 ms to 1 ks with the sweep modulation function. If a shorter duration is desired, you can prepare a chirp waveform in the .CSV or .MAT file format, upload it to Moku:Lab's Arbitrary Waveform Generator and output it via the custom waveform option.

Can Moku:Lab analyze control loops ?

Published December 22nd, 2020 by Paul Cracknell

The Moku:Lab Frequency Response Analyzer is well suited to producing Bode plots for control loop stability and analysis. This application note, "Power Supply Stability" discusses the setup and analysis of the control loop of a linear regulator power supply. Read more about Moku:Lab's Frequency Response Analyzer.

MATLAB: Frequency Response Analyzer (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement a plotting Frequency Response Analyzer %% Plotting Frequency Response Example % % This example demonstrates how you can generate output sweeps using the % Frequency Response Analyzer instrument, and view transfer function data in real-time. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = in

Can the Arbitrary Waveform Generator be triggered?

Published December 22nd, 2020 by Paul Cracknell

Using the trigger on the AWG Moku's Arbitrary Waveform Generator can be configured to trigger the generation of the output waveform. Set the modulation type to "Burst", then it is possible to configure the trigger source. Input 1, Input 2, or the external trigger on the rear of Moku:Lab and Moku:Pro can be selected as the trigger source. The trigger

Can I load my own filter coefficients?

Published December 22nd, 2020 by Paul Cracknell

Yes! Moku:Lab’s Digital Filter Box implements infinite impulse response (IIR) filters using 4 cascaded Direct Form I second-order stages with a final output gain stage. To specify a filter, you must supply a text file containing the filter coefficients. The file should have 6 coefficients per line, with each line representing a single stage. If outp

Premium service package

Published October 27th, 2021 by Paul Cracknell

The Premium Service Package provides premium support for covered Moku hardware for one year and can be renewed annually. Premium service includes: Technical Support: Access to Application Engineers for support via email and phone, with expedited turnaround time for responses (1 business day). Advanced Replacement: If a repair is required we will pro

What laser locking techniques does the Laser Lock Box support?

Published December 22nd, 2020 by Paul Cracknell

The Laser Lock Box supports a number of different locking techniques including Pound-Drever-Hall (PDH) locking, Fringe-side locking, Tilt locking, RF locking, and Dither locking.

Repairs

Published October 27th, 2021 by Paul Cracknell

Please contact support@liquidinstruments.com if your products require repair. The typical turnaround time for repairs is 10 business days. If a fee is required, Liquid Instruments will provide you with a quote and obtain your approval before commencing any repairs.

iPad OS 14 privacy setting requirement

Published December 22nd, 2020 by Paul Cracknell

With the (iPad OS 14) update, you will need to grant permission to Moku:Lab App to access the iPad's local network, in order to discover Moku:Labs connected to your network. In case you have denied access, you can fix this by going into Settings -> Privacy -> Local Network -> Toggle On for Moku:Lab.

How do I convert Ki, Kp, Kd to crossover frequencies or vice versa?

Published July 12th, 2021 by Paul Cracknell

The integrator or differentiator crossover frequencies are the frequencies where the integrator or differentiator gain is equal to the proportional gain (or 1 in cases when the proportional gain is not enabled). For the integrator, the gain is inversely proportional to frequency. For the differentiator, the gain is proportional to frequency. With 0

Stimulated Raman Scattering Microscopy

Published December 22nd, 2020 by Paul Cracknell

The Raman effect was first discovered in the 1920s by C.V. Raman. It is a widely used spectroscopic method to determine the vibrational modes of molecules. In this application note, we describe how Moku:Lab’s Lock-in Amplifier is implemented in a state-of-art stimulated Raman imaging setup at Boston University.

MATLAB: Arbitrary Waveform Generator

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Arbitrary Waveform Generator %% Arbitrary Waveform Generator Basic Example % % This example demonstrates how you can generate and output arbitrary % waveforms using the Arbitrary Waveform Generator instrument. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Prepare the waveforms % Prepare a square waveform to be

Moku:Lab contains an FPGA. Can I access the FPGA to execute my own code?

Published December 22nd, 2020 by Paul Cracknell

Access the FPGA to execute code or design custom instrument Sorry, not yet. We hope to bring you this capability in the future. If this feature is important to you please let us know, but for now Moku:Lab is designed to work out of the box in the same way as conventional test and measurement instruments like oscilloscopes and waveform generators.

Python: Lock-in Amplifier

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Lock-in Amplifier # # pymoku example: Basic Lock-in Amplifier # # This example demonstrates how you can configure the lock-in amplifier # instrument # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import LockInAmp # Use Moku.get_by_serial() or get_by_name() if you don

MATLAB: IIR Filter Box (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the IIR Filter Box (plotting) %% IIR Filter Box plotting example % % This example demonstrates how you can configure the IIR Filter Box % with custom generated filter coefficients, and set up real-time % monitoring of the input and output signals. % % NOTE: This example requires installation of the MATLAB Signal Pr

Latency of external trigger

Published February 13th, 2023 by Paul Cracknell

Moku:Lab and Moku:Pro have an external trigger port, located on the rear panel. This can be used to trigger Moku Waveform Generator. The latency from external trigger event to output waveform is : External trigger to output waveform latency Moku:Pro 340 ns Moku:Lab 400 ns

Can I control more than one Moku:Lab device within the same MATLAB script?

Published December 22nd, 2020 by Paul Cracknell

MATLAB controls multiple Moku:Labs Yes you can! You can connect to as many Moku:Labs as you want to in the same script and control them all in the same script. In this example we deploy and Oscilloscope on Moku #1 and a Lock-In Amplifier on Moku #2 %% Multi Moku:Lab Example % % This example demonstrates how you can configure multiple Moku:Labs % at

MATLAB: Spectrum Analyzer

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Spectrum Analyzer %% Basic Spectrum Analyzer % % This example demonstrates how you can use the Spectrum Analyzer instrument % to retrieve a single spectrum data frame over a set frequency span. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address:

Python: Phasemeter (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Phasemeter (plotting) # # pymoku example: Plotting Phasemeter # # This example demonstrates how you can configure the Phasemeter instrument # and stream dual-channel samples of the form [fs, f, count, phase, I, Q]. # The signal amplitude is calculated using these samples, and plotted for # real-time viewing. #

Python: Oscilloscope

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Oscilloscope # # pymoku example: Basic Oscilloscope # # This script demonstrates how to use the Oscilloscope instrument # to retrieve a single frame of dual-channel voltage data. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import Oscilloscope # Connect to your Mok

Can I use cursors in the Windows App?

Published December 22nd, 2020 by Paul Cracknell

Yes! Cursors are great tools for taking accurate measurements in Moku:Lab instruments. Adding cursors Click to select the trace to add cursor to, then right click to select a cursor option. Keyboard shortcuts: x-axis cursor: Ctrl + click y-axis cursor: Shift + click Moving cursors Click to select the cursor then drag to move it.

How do I ensure that I have the latest instrument versions on my Moku?

Published December 22nd, 2020 by Paul Cracknell

Keep your Moku instruments up to date Liquid Instruments regularly updates and improves our instruments with new version releases. The iPad, Windows, and macOS apps contains all the instruments. To ensure that you have the latest set of instruments, please visit the App Store and ensure your iPad is up to date. The iPad app will ensure that Moku:Lab

What reference does the Phasemeter measure against?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Phasemeter measures the phase of the input signal against an internal oscillator, derived from the on-board clock. The frequency of the local oscillator is set by the 'Frequency' option under the 'Channels' pane. You can synchronize Moku:Lab with other electronics using the 10 MHz in and out ports on the backside of the device.

What file formats are supported in the Moku:Lab Data Logger?

Published December 22nd, 2020 by Paul Cracknell

Files formatted with comma- or newline-delimited text are supported for data logging. Alternatively, binary (.LI) files are supported as well and can be later converted to comma- or newline-delimited text.

What are 10-bit and 18-bit ADCs with blending ?

Published February 2nd, 2022 by Paul Cracknell

Moku:Pro incorporates a patented blending scheme to deliver a low noise floor and high dynamic range from 10 Hz to 600 MHz. In test and measurement, flexibility has typically demanded tradeoffs in performance. Liquid Instruments has overcome these tradeoffs by blending signals from a high speed 5 GSa/s, 10 bit ADC and a lower speed 10 MSA/s 18 bit A

How to switch instrument on Moku:Lab

Published December 22nd, 2020 by Paul Cracknell

Accessing different instruments on the iPad App To switch instruments, tap the menu icon on the top left corner, then "Switch instruments" You can switch to a different instrument directly by tapping on the icon of the instrument. You can also open the initial instrument menu by tapping "Select an instrument..." and swipe through the menu to find th

How do I generate a custom filter for laser lock box with scipy?

Published July 13th, 2021 by Paul Cracknell

Moku:Lab laser lock box implements a 2 cascaded direct form I second-order stages IIR filter. It has a fixed sampling rate at 31.25 MHz. The coefficients can be set by set_custom_filter function in pymoku or MATLAB API, or directly loaded on the iPad with a 6 by 2 (6 columns, 2 rows) array as the following: s1 b0.1 b1.1 b2.1 a1.1 a2.1 s2 b0.2 b1.2 b

Python: PID controller

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the PID controller # pymoku example: Basic PID Controller # # This script demonstrates how to configure one of the two PID Controllers # in the PID Controller instrument. Configuration is done by specifying # frequency response characteristics of the controller. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymo

How to match channel scale settings in the Oscilloscope

Published July 13th, 2021 by Paul Cracknell

To rapidly set the both channels in the Oscilloscope to use the same scaling, follow these steps: Tap to select a trace and set the scale to best match your signal Hold down on the same trace to open the channel menu Select "Sync channel scales" to map the same settings to the other channel After completing these steps, you should see both channels

MATLAB: Lock-in Amplifier (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Lock-in Amplifier (plotting) %% Plotting Lock-In Amplifier Example % % This example demonstrates how you can configure the lock-in amplifier % instrument and monitor the signals in real-time. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP address: '

How to remove drift in Phasemeter measurement

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab uses a digitally implemented phase-locked loop architecture to measure the phase, frequency, and amplitude of a signal. If you are seeing an unexpected and constant drift in your phase measurement, it can be due to frequency settings at the output or the input side. You can adjust Moku:Lab's Phasemeter with the following settings to remove

Python: Frequency Response Analyzer (basic)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Frequency Response Analyzer (basic) # pymoku example: Basic Frequency Response Analyzer # # This example demonstrates how you can generate output sweeps using the # Frequency Response Analyzer instrument, and view transfer function data in # real-time. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku imp

How to adjust the plot scale in the Windows App instruments?

Published December 22nd, 2020 by Paul Cracknell

Windows app axis scale adjustment In the Windows app, to adjust the y-axis scale: click to select the trace to zoom, then hover the cursor above the plot and scroll up to zoom in and scroll down to zoom out. To adjust the x-scale: hover the cursor above the plot, hold down Ctrl key, then scroll up to zoom in and scroll down to zoom out. Click and dr

iPad app cannot find Moku:Lab

Published May 27th, 2021 by Paul Cracknell

From iPadOS 14, Apple has introduced new app privacy controls. The user has enhanced control over apps and the services to which they have access. Apps are required to gain user permission to access local network resources. The Moku iPad app needs local network access to locate and operate the Moku:Lab. If your iPad cannot locate your Moku:Lab, plea

MATLAB: Spectrum Analyzer (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Spectrum Analyzer (plotting) %% Plotting Spectrum Analyzer Example % % This example demonstrates how you can configure the Spectrum Analyzer % instrument and plot its spectrum data in real-time. It also shows how % you can use its embedded signal generator to generate a sweep and single % frequency waveform on

Can I connect to a Moku:Lab directly by IP address?

Published December 22nd, 2020 by Paul Cracknell

Directly connect to a Moku:Lab via its network IP address If Moku:Lab is connected to a wired ethernet or wireless wifi network, you can connect to it directly even if it is not automatically discovered. iPad In the iPad app, simply tap on the '?’ button which appears in the bottom left corner of the “Select your device” screen, then choose “Other d

How do I get started with Moku:Lab instruments

Published December 22nd, 2020 by Paul Cracknell

Accessing instrument tutorials Basic tutorials for each instrument are available in the iPad App. To access these tutorials, deploy the desired instrument and press the main menu button at the top left of the screen, then select “Show Help”.

Python Waveform Generator : burst mode

Published March 2nd, 2021 by Paul Cracknell

The Python script below to setups the Waveform Generator in burst (or N-cycle) mode. It generates 20 cycles of a 10 MHz sine wave, 2 Vpp; repeating every 200 us. # pymoku example: Waveform generator n-cycle burst mode # # This example demonstrates how you can configure the waveform generator # instrument to generate signals in burst mode for a s

Can the Lock-in Amplifier demodulate using an external source?

Published December 22nd, 2020 by Paul Cracknell

Yes. Moku:Lab's Lock-in Amplifier supports direct demodulation with an external source, demodulation with a PLL (phase-locked loop) locked to an external source, and the ability to modulate and demodulate at different frequencies. To change the demodulation signal source, tap the Configuration icon on the top right corner and select from "Local osci

MATLAB: Waveform Generator

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Waveform Generator %% Basic Waveform Generator Example % % This example demonstrates how you can use the Waveform Generator % instrument to generate an amplitude modulated sinewave on Channel 1, and % un-modulated squarewave on Channel 2. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip =

Why are some instruments greyed out in the Windows App?

Published December 22nd, 2020 by Paul Cracknell

Our Windows App is still in beta testing stage. Currently it supports the following instruments : Arbitrary Waveform Generator Frequency Response Analyzer Lock-in Amplifier Oscilloscope PID controller Spectrum Analyzer Waveform Generator Data logger FIR filter builder Our development team is working hard to bring more instruments into the Windows Ap

How to turn on your Moku's WiFi access point

Published December 22nd, 2020 by Paul Cracknell

Configuring the Moku WiFi access point Moku devices are equipped with an onboard WiFi access point, which means it can generate its own WiFi network. Your Moku should have its access point turned on when you power it on for the first time. In case you have turned off the access point, you can reconfigure to power it on again in the Moku: App Power o

Can I indicate where I am touching the iPad’s screen while presenting using Moku:Lab?

Published December 22nd, 2020 by Paul Cracknell

Lecture or group presentations with Moku:Lab Yes! Your audience can better follow the presentation by enabling the built-in touch point feature. This is a great way of presenting a lab experiment remotely via a video conference. Your remote audience can see the presenter's interaction with Moku:Lab and your experiment while working from home.

What if my actuator can't take negative voltages?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Laser Lock Box has output voltage limiters designed for exactly this purpose. You can set arbitrary high and low limits on each output and the control signals will be clamped to these levels, preventing damage to sensitive actuators. Note that the modulation signal from the auxiliary oscillator is not clamped to avoid clipping and distort

How to access multiple controls on the instrument display

Published December 22nd, 2020 by Paul Cracknell

For several of the instruments in the iPad Moku:Lab App, settings panels can be dragged onto the main display and become floating control panels. To edit items in floating control panel: double tap the header.

How can I invert my controller's response?

Published December 22nd, 2020 by Paul Cracknell

To invert your controller's response you can enter negative values into the control matrix to invert one or both input signals.

Python: Data Logger (basic)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Data Logger (basic) # pymoku example: Basic Datalogger # # This example demonstrates use of the Datalogger instrument to log time-series # voltage data to a (Binary or CSV) file. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku, StreamException from pymoku.instruments import Datalogger import

MATLAB: PID controller

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the PID Controller (plotting) %% Plotting PID Controller Example % This script demonstrates how to configure a single PID Controller in the % PID Controller instrument by specifying its frequency response % characteristics. The input and output and output signal of this PID are % also plotted in real time. % % (c)

Can I disable firmware updates ?

Published December 22nd, 2020 by Paul Cracknell

How to disable automatic firmware update on Moku:Lab Liquid Instruments continues to improve Moku:Lab and add new features. We regularly update both the iPad app and Windows app; both apps automatically check for updates. The update history is here : Update log The apps contain the Moku:Lab firmware and some updates will need a new version of firmwa

Can you do frequency domain analysis in the lock-in amplifier?

Published December 22nd, 2020 by Paul Cracknell

Yes. The built-in oscilloscope can perform FFT at every probe point. The FFT feature can be accessed via the Math function. If a higher spectral resolution is required, we recommend switching to the spectrum analyzer instrument. Switching between instruments on Moku:Lab only takes up to a few seconds. Analyze the signal in the spectrum analyzer prov

What is timebase setting "roll"?

Published December 22nd, 2020 by Paul Cracknell

The "roll" setting on the timebase control panel is especially useful for slow-changing signals, typically with a timebase of greater than approximately 100 ms/div. Rather than responding to trigger events, the oscilloscope will provide a continuously scrolling signal display with the effective trigger point set at the far right of the trace display

How to connect Moku:Lab via USB in Windows

Published December 22nd, 2020 by Paul Cracknell

The Moku:Lab can connect to the Windows app via a simple USB cable; no ethernet or WiFi is needed. This is accomplished by a RNDIS ('remote network driver interface specification') over USB. Connect a USB cable between the Moku:Lab micro B data port and your PC Open Windows Device Manager, confirm a RNDIS connection under Network Adapters. If Moku:L

Python: Phasemeter (streaming)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Phasemeter (streaming). # pymoku example: Phasemeter networking streaming # # This example starts a 10-second network stream of Channel 1 Phasemeter data # and processes it live. The contents of each data sample are printed out, # along with the signal amplitude which may be calculated as A = (I^2 + Q^2). # # (

Custom Arbitrary Waveform Generator example

Published December 22nd, 2020 by Paul Cracknell

Example of two channel arbitrary waveform generator This application note ("Arbitrary Waveform Generator Dual Channel Synchronized Pattern Generator for 2d arbitrary beam steering") illustrates the use of MATLAB to generate and upload a calculated waveform to Moku:Lab. The waveform is then displayed in the X-Y mode of the Moku:Lab's oscilloscope.

Python: Arbitrary Waveform Generator

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Arbitrary Waveform Generator # pymoku example: Arbitrary waveform generator # # This example demonstrates how you can generate and output arbitrary # waveforms using Moku:AWG # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import ArbitraryWaveGen import numpy as np #

How do I access Moku:Pro's internal SSD ?

Published February 2nd, 2022 by Paul Cracknell

Many of the Moku:Pro instruments, for example the Datalogger, Lock-in Amplifier, Digital Filter Box and PID Controller integrate the ability to log data to the Moku:Pro's internal SSD storage. You can access a list of Moku datafile at <moku.ip.address>/api/ssd/list and then downloaded by : <moku.ip.address>/api/ssd/download/<filename

Getting started with pyMoku

Published December 22nd, 2020 by Paul Cracknell

How do I install pyMoku and use Python with Moku:Lab? Install the pyMoku package via Python pip. Detailed instructions can be foundin the quick-start guide. Quick Start Guide for pyMoku

Python: PID controller (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the PID controller (plotting) # pymoku example: PID Controller Plotting Example # # This script demonstrates how to configure both PID Controllers # in the PID Controller instrument. Configuration on the Channel 1 # PID is done by specifying frequency response characteristics, # while Channel 2 specifies the gain c

How to connect to Moku:Lab via USB and iPad

Published December 22nd, 2020 by Paul Cracknell

A step-by-step guide for setting up Moku:Lab with USB connection to an iPad There are some situations, for example in a restricted lab environment or for radio interference reasons, where you may wish to use Moku:Lab with neither Wi-Fi nor ethernet. The Moku:Lab can connect to the iPad app via a USB cable; no ethernet or wifi is needed. This is acco

IEC/ISO 17025 calibration: which instruments does it cover?

Published December 22nd, 2020 by Paul Cracknell

Calibration covers all Moku:Lab instruments Calibration is performed on the hardware and encompasses all Moku:Lab instruments. What happens if I buy Moku:Lab with 17025 calibration, and then later purchase an additional instrument for the same hardware? Do I need to recalibrate? There is no need for recalibration for new instrument purchases.

Moku:Lab Lock-in Amplifier, external trigger

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Lock-in Amplifier has a built-in oscilloscope that has flexible probe points to observe signals at various points in lock-in processing chain. Either probe A or probe B may be used as a source of a trigger for the oscilloscope. Additionally, the oscilloscope may be set to trigger automatically, singly or on Nth events on signals on the ex

How can I import a .CSV file from Moku:Lab’s Data Logger into MATLAB?

Published December 22nd, 2020 by Paul Cracknell

If you only need the data, simply type “load yourfile.csv” at the MATLAB command prompt. CSV files generated by Moku:Lab’s Data Logger also contain a text header with information about when the data was recorded, the instrument settings, and what each column in the data represents. If you want to import this metadata as well, use the command “moku =

Meauring impedance with Moku:Go (part 1)

Published June 30th, 2023 by Paul Cracknell

These two Python scripts accompany the application note “Measuring Impedance with Moku:Go, part 1, resistance”. One port method # moku example: Single-Port Impedance Test # # This example demonstrates how you can take an impedance of a device under # test using the single-port method # # Initializing the Instrument and Functions from moku.instrume

Waveform Generator and Frequency Modulation

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Waveform Generator and Frequency Modulation Moku:Lab's Waveform generator instrument is a flexible function generator capable of Amplitude, Frequency or Phase modulation (AM, FM or PM). Here we see the Waveform Generator setup with a 10 MHz carrier on channel 1 & modulation source set to an internally generated signal. The FM deviatio

Moku:Lab oscilloscope probe compensation

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab oscilloscope can be used to compensate a probe to ensure both accurate measurements of voltage and frequency and also precise waveform representation. The Moku:Lab oscilloscope has an integrated waveform generator; the video shows the waveform generator being set to 1 kHz, 2 Vpp. The under-compensated signal is then adjusted to slightly ove

Python Spectrum analyzer 'Max hold' function

Published December 22nd, 2020 by Paul Cracknell

How can I create a 'Max Hold' in Python on the Moku:Lab Spectrum Analyzer The Moku:Lab's Spectrum Analyzer includes a math channel on both the iPad and Windows app. This math channel has a useful 'max hold' function. The attached Python script deploys a Spectrum Analyzer instrument, sweeps the frequency and captures this data into Python. Within Pyt

Python: Spectrum Analyzer

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Spectrum Analyzer # pymoku example: Basic Spectrum Analyzer # # This example demonstrates how you can use the Spectrum Analyzer instrument to # to retrieve a single spectrum data frame over a set frequency span. # # (c) 2017 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import S

Moku app language selection

Published June 26th, 2023 by Paul Cracknell

The Moku app can be operated in Chinese, English, German, Japanese and Korean

How do I calculate the power density spectrum if the measured phase has a constant drift?

Published July 13th, 2021 by Paul Cracknell

In some circumstances, it's not possible to synchronize Moku:Lab onboard clock with the frequency synthesizer in the system. The measured phase trace has a constant drift. This can be fixed by a linear detrend process before the power spectrum density (PSD) calculation. In Python, the detrend can be performed by adding a detrend='constant' option i

MATLAB: Oscilloscope (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example MATLAB script to implement the Oscilloscope (plotting) %% Plotting Oscilloscope Example % % This example demonstrates how you can configure the Oscilloscope instrument, % and view triggered time-voltage data frames in real-time. % % (c) 2017 Liquid Instruments Pty. Ltd. % %% Connect to your Moku ip = input('Please enter your Moku:Lab IP addr

How can I plot the ratio of input 1 and input 2 using the Moku Frequency Response Analyzer?

Published December 22nd, 2020 by Paul Cracknell

By default, each channel shows the ratio of the input to the output, In / Out. This is useful for measuring the transfer function of a device under test. The math channel allows you to plot different combinations of Ch 1 and Ch 2. If the output amplitudes of both channels are set to the same value, then viewing the math channel as Ch 1 / Ch 2 will s

Example AWG custom waveform

Published December 22nd, 2020 by Paul Cracknell

Custom waveforms in Arbitrary Waveform Generator You can generate customized, fully arbitrary waveforms with Moku's Arbitrary Waveform Generator. Define the waveform you need in a simple text file. For Moku:Lab, the file can be loaded from the SD card, the iPad app, or Windows app. For Moku:Go and Moku:Pro, the file and be loaded from the iPad, Wind

How do you adjust the input gain or invert the PID input?

Published December 22nd, 2020 by Paul Cracknell

The control matrix can be used to multiply the input by a factor of -20 to 20 with an increment of 0.1 (-10, 10), or 1 [-20, 10]∪[10, 20]. This can be effectively used to apply input gain, or invert the input.

How do I find Moku:Lab's IP address?

Published December 22nd, 2020 by Paul Cracknell

There are multiple ways to determine the IP address of your Moku:Lab depending on the software interface you use. The recommended methods are through the iPad App, pyMoku, and the Windows App. iPad App Tap and hold your Moku:Lab in the Device menu; a window will open to show the Moku's IP address, along with firmware version, name and other informa

Which instruments are currently supported in LabVIEW?

Published December 22nd, 2020 by Paul Cracknell

All 12 instruments are currently supported in LabVIEW. Learn more about LabVIEW integration here: https://liquidinstruments.com/software/labview/

Python: Waveform Generator

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Waveform Generator # # pymoku example: Waveform Generator Basic # # This example demonstrates how you can use the Waveform Generator instrument # to generate a sinewave on Channel 1 and a squarewave on Channel 2. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import

How do I know if my Moku app is up to date?

Published December 22nd, 2020 by Paul Cracknell

Latest version of Windows and macOS app The latest version of the Moku app is always available on our website. You will also be notified for updates in the app. A red dot will appear in the notification bell icon when a new version of the app is available.

What is ISO/IEC 17025?

Published December 22nd, 2020 by Paul Cracknell

ISO/IEC 17025 calibration standard ISO/IEC 17025 establishes a global standard for instrument calibration and testing. It specifies the general requirements for the competence to carry out tests and/or calibrations. Laboratories use ISO/IEC 17025 to implement a quality system aimed at ensuring their ability to consistently produce valid results and

What's the difference between the spectrum analyzer and oscilloscope FFT?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab spectrum analyzer is considered as a 'real-time' spectrum analyzer. It down-converts the signal once according to the frequency window and then performs an FFT. This ensures the instrument has a higher spectral resolution while maintaining a reasonable measurement speed. Detailed explanation can be found in this application note.

Moku:Lab Windows driver security

Published December 22nd, 2020 by Paul Cracknell

When connecting to Moku:Lab via USB to a Windows machine; the Moku:Lab establishes a "RNDIS" connection to Windows. Moku:Lab appears as a network device; the Microsoft RNDIS driver is integrated into standard Windows 10. Thus there is no separate Moku:Lab windows/USB driver and thus no need for signing of any driver.

Can I use Moku:Lab via VPN?

Published July 13th, 2021 by Paul Cracknell

You can remotely access, control, and configure Moku:Lab via VPN from your computer or iPad. However, the automatic device discovery feature on Moku:Lab relies on Bonjour, a protocol developed by Apple. This feature may be limited in certain VPN environments. So we recommend connecting the device directly via IP address. Detailed information on dire

What is the latest iPad app version?

Published December 22nd, 2020 by Paul Cracknell

iPad app version You can always keep Moku:Lab's iPad app updated by connecting to the Apple app store : Download the App Release notes detailing the latest version and significant app changes are available here: https://liquidinstruments.com/support/software/ipad-app/

What are my options for triggered burst mode?

Published December 22nd, 2020 by Paul Cracknell

The three triggered burst modes of the Waveform Generator explained Start mode: start generating a signal from a trigger event. N cycle mode: output a predefined number of periods for a given signal. Gated mode: turn your output on/off depending on your trigger. For more information on the Moku Waveform Generator instrument, please refer to the User

pyMoku experiences deploy errors

Published December 22nd, 2020 by Paul Cracknell

Confirm you have the latest binary data pack and your Moku:Lab is running the latest firmware. To update the binary data, please type the following commands into your terminal (replacing the serial number with the serial number of your Moku:Lab): moku update fetch moku--serial=123456 update in

Can I set the channel offset in screen divisions while zooming?

Published December 22nd, 2020 by Paul Cracknell

To zoom in and out while keeping the channel offset fixed on the screen, simply pan up or down with two fingers held together. This "rapid zooming" technique works horizontally and on other instruments as well!

How to connect to the access point of a Moku device?

Published December 22nd, 2020 by Paul Cracknell

Connecting to your Moku's WiFi access point Each Moku is equipped with an onboard WiFi access point, which is useful for initial device setup and instrument control without the need for ethernet or any other WiFi network. Your Moku will have the access point turned on by default. However, if you have turned off the access point, please refer to this

How to switch instruments in the Windows App?

Published December 22nd, 2020 by Paul Cracknell

To return to the main instrument menu in the Windows App, click the back arrow on the top left corner. A new instrument can now be launched from the menu.

Logging speed of Moku Data Logger

Published March 11th, 2021 by Paul Cracknell

Moku:Go Moku:Go's Data Logger can store logs to the internal RAM. It can log 1 or 2 channels and the maximum logging speed varies Moku:Lab Moku:Lab's Data Logger can store logs to the internal RAM or to an external SD card. It can log 1 or 2 channels and the maximum logging speed varies according to both log file storage and also log file format. W

Do you have a Windows app?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab on Windows Yes! Moku:Lab on Windows is currently in Beta with 9 instruments and rapidly evolving. Sign up for immediate access to released instruments (live or in demo mode) within Moku:Lab’s Windows App, and we’ll keep you up to date as development progresses. Released instruments: Arbitrary Waveform GeneratorFrequency Response AnalyzerLoc

Can I load my own FIR filter coefficients?

Published December 22nd, 2020 by Paul Cracknell

Yes, you can input your filter coefficients by placing your coefficients into a .CSV file. In the FIR filter editor, select "custom" impulse response and then select your coefficient file.

Moku:Lab - a capacitance meter

Published December 22nd, 2020 by Paul Cracknell

Using Moku:Lab, pyMoku and Python to implement a real time capacitance meter In this video we describe how to use the Frequency Response Analyzer to measure a capacitor. The Python script in both plain text .py and Jupyter notebook format is attached below the video. Also see how to measure inductors in this application note : A guide to measuring i

Frequency Response of EFI / RFI filter

Published December 22nd, 2020 by Paul Cracknell

In this applications note ("EMI filter insertion loss measurement with Moku:Lab's Frequency Response Analyzer") we measure the response of an EMI / RFI filter and compare to the manufacturers data sheet

Python: Oscilloscope (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Oscilloscope (plotting) # pymoku example: Plotting Oscilloscope # # This example demonstrates how you can configure the Oscilloscope instrument, # and view triggered time-voltage data frames in real-time. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import Oscillos

How to connect Moku:Lab to an existing network via Ethernet

Published December 22nd, 2020 by Paul Cracknell

Ethernet connection setup When Moku:Lab powers on for the first time, it will be in its factory default state with the ethernet connection enabled. Simply connect an ethernet cable form your router to the ethernet port on the rear of the Moku:Lab to connect it to the network. The Moku:Lab will request an IP address via DHCP and will be discoverable

What is the input to output latency for Laser Lock Box

Published December 22nd, 2020 by Paul Cracknell

The input to output latency is dependent on the low-pass filter bandwidth. The shortest latency number can be achieved with the highest low-pass filter cut-off frequency. Also, the faster controller has a shorter latency. The following table provides a few reference points for the input to output latency. Low-pass corner 30° phase delay frequency La

How do I generate waveforms on Moku:Lab’s analog outputs while running the Spectrum Analyzer?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Spectrum Analyzer can be configured to generate two independent sine waves up to 250 MHz each on Moku:Lab’s analog outputs. In the iPad App, open the instrument Configuration Panel by tapping on the settings icon (located on the top-right corner of the screen). Select the Output tab, then configure and turn on the desired channel(s).

What do the different colored buttons mean when configuring a PID controller?

Published December 22nd, 2020 by Paul Cracknell

It is often useful to be able to configure a controller’s transfer function before implementing it. When the ‘P’, ‘I’, ‘D’, ‘I+’, ‘IS’, or ‘DS’ buttons are orange, any changes you make to those parameters will not take effect until you tap the button again and it turns green or purple. This feature is only available for Moku:Lab and Moku:Pro on the

Python: Waveform Generator (triggered)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Waveform Generator with trigger # # pymoku example: Waveform Generator Triggering # # This example demonstrates how you can use the Waveform Generator instrument # to generate a gated sinewave on Channel 1, and a swept frequency squarewave # on Channel 2. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku

Python: IIR Filter Box (basic)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the IIR Filter Box (basic) # pymoku example: Basic IIR Filter Box # # This example demonstrates how you can configure the IIR Filter instrument, # configure real-time monitoring of the input and output signals. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import IIRFil

How do I update my Moku’s firmware?

Published December 22nd, 2020 by Paul Cracknell

Each Moku's firmware can be updated from either the iPad or Desktop app. The process is the same whether you are using the iPad or Desktop app. This article will explain how to update from either app. Moku:Go is the only exception because there is no iPad app, so it must be updated from the Desktop app. You will know that your Moku is ready for a fi

How do I find the serial number of a Moku ?

Published December 22nd, 2020 by Paul Cracknell

For all Mokus, the serial number can be located within the Moku: app or on a printed label on the bottom surface of each Moku. Moku desktop app Right click on the Moku icon -> Device info -> Serial Number Moku iPad app Tap and hold the Moku icon to reveal the serial number Printed Label Printed labels are located on the bottom surface of eac

What are the definitions of the Oscilloscope's measurements?

Published December 22nd, 2020 by Paul Cracknell

Frequency Frequency of the signal as determined by the time between rising or falling edges Period Time between pairs of rising or falling edges Duty Cycle Ratio of the time spent above the median to that spent below it Pulse Width Time the signal spends above the median Negative Width Time the signal spends below the median Mean Average value of th

I just upgraded my Moku with a new instrument, how do I install it?

Published December 22nd, 2020 by Paul Cracknell

If your Moku is connected to the internet, via WiFi or ethernet, new instruments should be automatically added once you receive an emailed confirmation of the update of your Moku's instruments. If the instrument list does not show all the instruments that you have purchased or your Moku cannot be connected to the internet, a device configuration upd

How do I track a peak?

Published December 22nd, 2020 by Paul Cracknell

Spectrum Analyzer peak tracking using the iPad App To track a peak, simply drag out a new marker from the ruler button at the bottom right corner. Track multiple peaks on a single channel by dragging markers directly to the peaks you want. The Measurements Panel is also marker-aware. Make measurements based on a marker’s characteristics such as ampl

Can you add more channels?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab has 2 input and 2 output channels Moku:Lab has 2 input and 2 output channels together with a trigger input, a 10MHz reference clock input, and a 10 MHz clock output. If you need more inputs or outputs, it is easy to synchronize multiple Moku:Labs via their reference clocks. Multiple Moku:Labs can be controlled by one iPad or with one PC via

Python: FIR Filter Box (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the FIR Filter Box (plotting) # pymoku example: FIR Filter Box Plotting Example # # This script demonstrates how to generate an FIR filter kernel with specified # parameters using the scipy library, and how to configure settings of the FIR # instrument. # # NOTE: FIR kernels should have a normalised power of <=

How do I adjust the sampling rate of the oscilloscope?

Published December 22nd, 2020 by Paul Cracknell

The sampling rate of the oscilloscope is set automatically based on the timebase. The current sampling rate is displayed at the bottom of the 'Timebase' pane on the right-hand side. To get a specific sampling rate, you can adjust the timebase until the displayed sampling rate reaches the desired value. Please note if the 'precision mode' is selected

How does the 'load' affect the waveform generator?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab waveform generator has fixed 50 Ω load resistors. When you connect the output to a 50 Ω device, the output voltage distributes to the internal load and external load equally. When you connect the output to a high-z device, most of the voltage distributes to the external load. Changing the 'load' on the user interface does not affect the act

What's the difference between external and external (PLL) mode?

Published December 22nd, 2020 by Paul Cracknell

The external mode directly multiplies the signal from input 1 and input 2. This feature is useful when the modulation signal is not a sinusoidal waveform. For example, if the modulation signal is a low duty cycle pulse, the direct multiplication significantly improves the demodulation spectral coverage, compared to sinusoidal demodulations. The exte

What is the closed-loop bandwidth of the PID?

Published December 22nd, 2020 by Paul Cracknell

The maximum achievable closed-loop bandwidth is determined by the signal propagation delay through the instrument, which is approximately 800 ns (resulting in a 30 degree phase delay at 100 kHz).

For how long can the Data Logger record ?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab’s Data Logger has a maximum logging time of 10,000 hrs; although in practice this may be limited by the available memory. Moku:Lab has 500 MB of internal storage (RAM) and can also log to an SD card of any size. Most SD cards use the FAT32 file system, which is limited to a maximum file size of 4 GB. Logging to a .LI file will give the long

How to change the units in the Phasemeter?

Published December 22nd, 2020 by Paul Cracknell

The Phasemeter can display the phase of measured signals in cycles, degrees, and radians; amplitude can be displayed in dBm, μVpp, and μVrms. To switch between different units, simply tap the unit in the iPad app to cycle through the available options.

Does it lock continuous wave and pulsed lasers?

Published December 22nd, 2020 by Paul Cracknell

Moku:Lab's Laser Lock Box can be used to stabilize the frequency of continuous wave lasers.

Python: Laser Lock Box (plotting)

Published December 22nd, 2020 by Paul Cracknell

Example Python script to implement the Laser Lock Box (plotting) # pymoku example: Plotting - Laser Lock Box # # This example demonstrates how you can configure the laser lock box # instrument and monitor signals at each oscilloscope probe point. # # (c) 2019 Liquid Instruments Pty. Ltd. # from pymoku import Moku from pymoku.instruments import Laser

How do you adjust the setpoint in PID controller?

Published December 22nd, 2020 by Paul Cracknell

The setpoint of Moku:Lab PID is controlled by the input offset. The error signal is offset by the value user entered here. This effectively make the setpoint be negative input offset.

What is the maximum rate at which I can save data, and how many points can I save?

Published December 22nd, 2020 by Paul Cracknell

The sample rate of the built-in Oscilloscope is dynamically adjusted by the horizontal zoom of the display, and can be set up to the full ADC sample rate of 500 MSa/s. Currently you can save 16k points for two channels simultaneously. For longer term data taking, use the data logging mode. Logging to .CSV is supported at up to 1 kSa/s. For faster d

Frequency Response Analyzer and harmonics

Published December 22nd, 2020 by Paul Cracknell

Yes, the Moku:Lab Frequency Response (FRA) can analyze up to the 15th harmonic of the fundamental swept sine. This can be useful for active systems, non linear systems or electrochemical or biological applications. The harmonic setting is under the 'Advanced' tab. In the first video, we have attached a MiniCircuits MK-3 frequency doubler. On the ini

LabVIEW datalogger full-app

Published December 22nd, 2020 by Paul Cracknell

How do I access datafile from the LabVIEW datalogger app ? When using the LabVIEW datalogger full-app; the log file is created on the Moku:Lab in either the internal RAM or external SDcard. The filename and path of this log file is shown in the bottom right of LabVIEW interface below. This file can then be accessed via HTTP e.g. Internal Moku RAM :

How can I read data from .li files?

Published December 22nd, 2020 by Paul Cracknell

The Data Logger can create files in a .LI format; this is a fast and compressed format. The LI File Converter can be used to convert binary data from a .li file into plain text data in .CSV (comma-separated values) format, or to a MATLAB .mat file. You can download the LI File Converter on the utilities page. The LI File Converter is also built into

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