MATLAB: Lock-in Amplifier
Written by Paul Cracknell
Updated at December 22nd, 2020
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Moku:Go
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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 the desired instrument
m = MokuLockInAmp(ip);
%% Configure the instrument
% Configure the two DAC outputs to provide the R (magnitude) and
% demodulation (local-oscillator in this case, see below) outputs.
% Give the main ('R') channel 100x gain
m.set_outputs('R','demod');
m.set_gain('main',100);
% Demodulate at 1MHz (internally-generated) with a 100Hz, 2nd-order
% (6dB/octave) LPF.
m.set_demodulation('internal','frequency',1e6);
m.set_filter(100,2);