RF Input vs Scope Voltage Level

Applications, development tools, FPGA, C, WEB
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omereis
Posts: 21
Joined: Mon Jan 27, 2020 1:10 pm

RF Input vs Scope Voltage Level

Post by omereis » Mon Sep 14, 2020 6:43 am

Hi All,
I'm reading RF input signal using rp_AcqGetDataV function on a 125-14 board.
It's working, based on the C code here:
https://redpitaya.readthedocs.io/en/lat ... exm1.html.

However, on the Scope application, and on an external scope, the voltage is much different.
For example, when injecting 2v peak-to-peak, the output sine from a generator, rp_AcqGetDataV reading show 40mV peak-to-peak.

Please note that the board is calibrated, and IN1 channel is set to HV.

What am I missing?

Thanks in advance,
Omer

radiationman
Posts: 9
Joined: Tue Mar 16, 2021 4:53 pm

Re: RF Input vs Scope Voltage Level

Post by radiationman » Mon Apr 19, 2021 8:37 pm

Bumping this post. Hopefully @red pitaya will reply.

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redpitaya
Site Admin
Posts: 881
Joined: Wed Mar 26, 2014 7:04 pm

Re: RF Input vs Scope Voltage Level

Post by redpitaya » Fri Apr 23, 2021 12:11 pm

Is the issue still manifesting after you manually
update the Red Pitaya OS to the latest BETA OS by using this guide:
https://www.youtube.com/watch?v=Qq_YRv2nk3c
?

omereis
Posts: 21
Joined: Mon Jan 27, 2020 1:10 pm

Re: RF Input vs Scope Voltage Level

Post by omereis » Sun Apr 25, 2021 10:52 am

Unfortunately yes

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