RP_REMOTE_ACQUIRE distorted pulse edges

Applications, development tools, FPGA, C, WEB
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DavSte
Posts: 6
Joined: Wed Jun 21, 2017 7:17 am

RP_REMOTE_ACQUIRE distorted pulse edges

Post by DavSte » Mon Jul 24, 2017 3:11 pm

Hello,

I'm using the RP_REMOTE_ACQUIRE program von Nils Roos to get Data out of both Channels. When I try to measure a 20kHz square-wave signal from a function generator I get distorted pulse edges, which I don’t get with the oscilloscope app.

Has anyone similar problems or any Idea how to fix it?
For my application I need to measure two channels for 10 ms at the same time.

amike88
Posts: 89
Joined: Tue Mar 29, 2016 7:41 pm

Re: RP_REMOTE_ACQUIRE distorted pulse edges

Post by amike88 » Tue Jul 25, 2017 9:48 am

I am not familiar with Nilses code, however from symptoms that you describe, it looks like Nilses FPGA image does not include a filter that compensates for analog ADC line distortions, that original Red PItaya FPGA image includes.

DavSte
Posts: 6
Joined: Wed Jun 21, 2017 7:17 am

Re: RP_REMOTE_ACQUIRE distorted pulse edges

Post by DavSte » Wed Jul 26, 2017 9:07 am

Yes thanks, I found this link https://forum.redpitaya.com/viewtopic.p ... 8&start=10.
Then I had to activate those Filter in the RP_REMOTE_ACQUIRE program at HV settings and now it works.

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