discovery2 W2 is not working with AnalogOut

[AndiCh]

I want to output a stereo Signal on wavegen. W1 is working as expected but W2 gives no Signal on oscilloscope.

The hardware is tested with Waveform tool and it is fine. I can output two different custom signals on W1 and W2. The SDK is up to date.

I assume to have a fault in initialisation of the channels. See the code is in the attachment. The problem is in play_Digilent() method.

A working example to output a custom signal on both channels would be very helpful.

record.py

[attila]

Hi @AndiCh

In the code for stereo data (self._dataRx.shape[1] == 2) you are configuring AWG 1 Carrier and FM nodes.

To play on AWG 1 and 2 use:

        channelw1 = c_int(0) # AWG 1
        channelw2 = c_int(1) # AWG 2
...
            dwf.FDwfAnalogOutNodeEnableSet(hdwf, channelw1, c_int(0), c_bool(True))
            dwf.FDwfAnalogOutNodeEnableSet(hdwf, channelw2, c_int(0), c_bool(True))
...

[AndiCh]

Hi

Thanks a lot for your fast answer. The Problem is solved. I post the working code as an example.

One thing for understanding. What is the parammeter "node" used for. I did missunderstand that as ch1 and ch2. In the SDK Refrence Manual is no explanation for that.

 

record.py

[attila]

Hi @AndiCh

Most of the analog-out functions have device handle, channel index and node arguments. The node represents the carrier, frequency and amplitude modulation.
For instance you can specify sine carrier and modulate the signal, or stream/play data in FM or AM buffer.