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Picoscope 5444B Max Signal Gen Frequency

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Picoscope 5444B Max Signal Gen Frequency

Postby kyoung » Thu Sep 17, 2015 12:57 am

Why is the SDK limited to 1 MHz when the scope is specified to 20 MHz? It breaks if I try to go faster than 1e6.

Thanks,
Kevin
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Re: Picoscope 5444B Max Signal Gen Frequency

Postby Hitesh » Thu Sep 17, 2015 8:35 am

Hi Kevin,

Which programming language example are you using?

How are you calling the ps5000aSetSigGenBuiltIn/ps5000aSetSigGenArbitrary function and what is the status code if it is non-zero?

Regards,
Hitesh

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Re: Picoscope 5444B Max Signal Gen Frequency

Postby Martyn » Thu Sep 17, 2015 10:47 am

I would suggest taking a look at Glitchy AWG

This is a standard effect of Direct Digital Synthesis (DDS) waveform generation.

The Generator DAC has a fixed update rate, in our case 200MS/s, so the output signal can only change every 5ns. If you are generating a square wave then the DAC can only output an edge on the 5ns boundaries, so if your signal period is not a multiple of 5ns the edge will jitter around by one sample.
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