IQ data collection

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wawdnaw
Posts: 4
Joined: Wed Feb 22, 2023 9:13 am

IQ data collection

Post by wawdnaw » Wed Feb 22, 2023 9:38 am

I am a noob. Now I am using an SDR receiver, how to get the IQ data after digital down-conversion? I don't want to use SDR software.

pavel
Posts: 789
Joined: Sat May 23, 2015 5:22 pm

Re: IQ data collection

Post by pavel » Wed Feb 22, 2023 1:12 pm

You can find two Python scripts that can be used to record and playback the IQ data at this link. They work with the wideband SDR transceiver.

wawdnaw
Posts: 4
Joined: Wed Feb 22, 2023 9:13 am

Re: IQ data collection

Post by wawdnaw » Thu Feb 23, 2023 3:41 am

Thank you very much for your reply. My model is 125-14, is this py script available? In addition, are these two files flashed to the SD card? As a rookie, I don't know the specific operation steps. My current PC is a Windows system. Do I need to change it to Linux?

wawdnaw
Posts: 4
Joined: Wed Feb 22, 2023 9:13 am

Re: IQ data collection

Post by wawdnaw » Thu Feb 23, 2023 3:42 am

pavel wrote:
Wed Feb 22, 2023 1:12 pm
You can find two Python scripts that can be used to record and playback the IQ data at this link. They work with the wideband SDR transceiver.
Thank you very much for your reply. My model is 125-14, is this py script available? In addition, are these two files flashed to the SD card? As a rookie, I don't know the specific operation steps. My current PC is a Windows system. Do I need to change it to Linux?

arutkeerthi
Posts: 5
Joined: Tue Jun 13, 2023 11:16 am

Re: IQ data collection

Post by arutkeerthi » Tue Jun 13, 2023 11:36 am

Can you tell me steps on how to get IQ data and continuous acuqisitions uising my redpitaya?
the model I have is also same as you-2 inputs and 2 outpus stemlab-14

ph2thet
Posts: 13
Joined: Wed Apr 06, 2022 12:53 am

Re: IQ data collection

Post by ph2thet » Thu Jun 22, 2023 10:23 am

pavel wrote:
Wed Feb 22, 2023 1:12 pm
You can find two Python scripts that can be used to record and playback the IQ data at this link. They work with the wideband SDR transceiver.
Looks very straightforward Pavel. Perfect. Are frequencies above 2.5M sampling too high to store to MMC? Or is it Python not keeping up?

pavel
Posts: 789
Joined: Sat May 23, 2015 5:22 pm

Re: IQ data collection

Post by pavel » Thu Jun 22, 2023 10:41 am

I am afraid I do not understand the question and how MMC is involved.

The Python scripts in my comment need to be run on a computer and communicate with the Red Pitaya board via the Ethernet interface.

Here is a link to a forum thread with more details on the project these scripts were developed for:
viewtopic.php?f=7&t=1030&start=10#p32553

For higher sample rates I have a couple of wideband receiver projects:
https://github.com/pavel-demin/red-pita ... eiver_wide
https://github.com/pavel-demin/red-pita ... ide_122_88

They are both dual channel receivers. The sample rates are 3.9 MSPS and 10.24 MSPS. The samples are 16-bit IQ samples.

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