Use AnalogOut SDK function to generate Sine Wave

[lokobob99]

Hey everyone,

I have a (simple) question: How could you use the SDK functions to generate a sine wave, which is a combination of e.g. 2 different frequencies? So, lets say for example, you have the following code:

print("Generating sine wave...")

dwf.FDwfAnalogOutNodeEnableSet(hdwf, c_int(0), AnalogOutNodeCarrier, c_int(1))

dwf.FDwfAnalogOutNodeFunctionSet(hdwf, c_int(0), AnalogOutNodeCarrier, funcSine)

dwf.FDwfAnalogOutNodeFrequencySet(hdwf, c_int(0), AnalogOutNodeCarrier, c_double(12000))

dwf.FDwfAnalogOutNodeAmplitudeSet(hdwf, c_int(0), AnalogOutNodeCarrier, c_double(0.705))

dwf.FDwfAnalogOutConfigure(hdwf, c_int(0), c_int(1))

 

This generates a sine wave with a frequency of 12000 Hz. Now let's say I want to generate a second sine wave with a frequency of 5000 Hz:

print("Generating sine wave...")

dwf.FDwfAnalogOutNodeEnableSet(hdwf, c_int(0), AnalogOutNodeCarrier, c_int(1))

dwf.FDwfAnalogOutNodeFunctionSet(hdwf, c_int(0), AnalogOutNodeCarrier, funcSine)

dwf.FDwfAnalogOutNodeFrequencySet(hdwf, c_int(0), AnalogOutNodeCarrier, c_double(5000))

dwf.FDwfAnalogOutNodeAmplitudeSet(hdwf, c_int(0), AnalogOutNodeCarrier, c_double(0.705))

dwf.FDwfAnalogOutConfigure(hdwf, c_int(0), c_int(1))

 

Now I would like to add these two sine signals, so that the output signal contains frequency components of 12000 Hz and 5000 Hz.

Thanks in advance for any help! 

PS: My goal with the custom signal is to use the FFT to get the 2 frequency components (5000 and 12000 Hz).

Kind regards

 

[attila]

Hi @lokobob99

With the ADP3X50 you can apply to the AM/SUM (and FM/phase modulation) options.
With any device use custom waveform, generate and add, 5 and 12 periods of sine and run at 1kHz.

[lokobob99]

Hey attila,

thank you for your answer. The problem is that I would like to use the waveforms SDK to generate the signal and not the software. Do you know if this is possible? :)

Kind regards

[attila]

Hi @lokobob99

Yes, see WF SDK/ samples/ py/ AnalogOut_Custom.py