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How do I upload a custom waveform on the desktop and iPad app?

Written by Sarah Elgamal

Updated at August 2nd, 2024

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The Arbitrary Waveform Generator can load custom waveforms from comma- or newline-delimited text. The maximum number of points depends on the sample rate. The relationship between the number of points and the sampling rate for each device can be found by clicking the “i” located on the graph on the desktop app ("?" on the iPad") which is indicated In Figure 1. These values can also be found in the user manuals or in Tables 1 through 3 found below for each device. 

 

Graphical user interface, text, application, chat or text message

Description automatically generated

Figure 1: Desktop App icon for the relationship between maximum points and sampling rate for each device.

 

Please note that the LUT data from a csv file needs to be a 1D array of amplitude values. The AWG assumes that they are evenly spaced over the set waveform period. The values will be normalized to the range [-1.0, +1.0] and then scaled to the desired amplitude and offset.

 

 

For the iPad interface:

Following the selection of the 'Custom' option from the available waveform types, simply tap on the graph and the drop-down shown in Figure 2 should appear. Here you can upload your waveform from a file or data from the system's clipboard. 

 

Figure 2: Using the iPad App to upload a custom waveform on the AWG

 

 

For the Desktop interface:

Upon selecting the 'Custom' option from the available  waveform types, you can load your waveform via a right-click action on the graph. Subsequently, hovering the mouse pointer over the 'Load waveform' option presents a menu of loading options, including loading from a file or the system clipboard. Figure 3 depicts the desired setup.

 

Text

Description automatically generated with medium confidence

Figure 3: Using the Desktop App to upload a custom waveform on the AWG

 

Maximum recommended sampling rate

  • The maximum safe frequency of the generated waveform is equal to the sampling rate
    divided by the number of points in the custom waveform.
    • For example, the maximum safe frequency of a 1000-point waveform is 1 GS/s /1000 Samples = 1 MHz
  • Exceeding the maximum recommended frequency will result in some points being skipped.

 

Moku:Pro

Max Number of Points

Sampling Rate

16,384

1.25 GSa/s

32,768

625 MSa/s

65,536

312.5 MSa/s

Table 1: Moku:Pro's maximum number of points for each sampling rate 

 

Moku:Lab

Max Number of Points

Sampling Rate

8,192

1 GSa/s

16,384

500 MSa/s

32,768

250 MSa/s

65,536

125 MSa/s

Table 2: Moku:Lab's maximum number of points for each sampling rate 

 

Moku:Go

Max Number of Points

Sampling Rate

8,192

125 MSa/s

16,384

62.5 MSa/s

32,768

31.25 MSa/s

65,536

15.625 MSa/s

Table 3: Moku:Go's maximum number of points for each sampling rate 

 

 

 

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  • Custom Arbitrary Waveform Generator example
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  • How can I upload custom waveforms from the iPad?
  • What file formats are supported in the Moku Data Logger instruments?

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