Add very basic QMxFE example

hsx_examples/qmxfe/QuadMxFE_Basic.m

@@ -0,0 +1,41 @@
+% Basic example of looping back Quad-MxFE (AD9081) using FPGA DDSs
+uri = 'ip:192.168.2.1';
+
+%% Tx set up
+tx = adi.QuadMxFE.Tx('uri',uri);
+tx.DataSource = 'DDS';
+toneFreq = 45e6;
+tx.DDSFrequencies = repmat(toneFreq,2,64);
+tx();
+
+%% Rx set up
+rx = adi.QuadMxFE.Rx('uri',uri);
+rx.SamplesPerFrame = 1024;
+
+%% Set NCOs to be the same between TX/RX
+mainNCOFrequency = 1e6*ones(1,4);
+channelNCOFrequency = 2e6*ones(1,4);
+for chip = {'A','B','C','D'}
+    rx.(['MainNCOFrequenciesChip',chip{:}]) = mainNCOFrequency;
+    rx.(['ChannelNCOFrequenciesChip',chip{:}]) = channelNCOFrequency;
+    tx.(['MainNCOFrequenciesChip',chip{:}]) = mainNCOFrequency;
+    tx.(['ChannelNCOFrequenciesChip',chip{:}]) = channelNCOFrequency;
+end
+
+%% Run
+for k=1:10
+    valid = false;
+    while ~valid
+        [out, valid] = rx();
+    end
+end
+rx.release();
+tx.release();
+
+%% Plot
+nSamp = length(out);
+fs = tx.SamplingRate;
+FFTRxData  = fftshift(10*log10(abs(fft(out))));
+df = fs/nSamp;  freqRangeRx = (-fs/2:df:fs/2-df).'/1000;
+plot(freqRangeRx, FFTRxData);
+xlabel('Frequency (kHz)');ylabel('Amplitude (dB)');grid on;