Picoscope 5444B Max Signal Gen Frequency

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kyoung
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Picoscope 5444B Max Signal Gen Frequency

Post by 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

Hitesh
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Re: Picoscope 5444B Max Signal Gen Frequency

Post by 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

Technical Support Engineer

Martyn
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Re: Picoscope 5444B Max Signal Gen Frequency

Post by 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.
Martyn
Technical Support Manager

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