Review Blogs - All Comments

RE: Blog 5 – Software defined radio with the Red Pitaya STEMlab 125-14 PRO Gen 2

shabaz — Mon, 02 Nov 2026 22:16:44 GMT

I find all the SDR apps to be pretty low quality and badly documented : ( Pothos SDR doesn't have any documentation regarding what each block does (and not all are intuitive) plus the UI could be better. I never look forward to using any SDR as a result, but it's a necessary evil sometimes, especially when needed for reverse-engineering radio protocols. If you know the modulation (or are willing to spend time experimenting), then it's a lot easier to use something like CC1101 instead of an SDR device, but that of course isn't helpful if you're actually trying to review the SDR itself of course.

Regarding the down-conversion, I think the frequency divider would be very difficult to get success with, it's a lot easier with a mixer (and a frequency generator source of some kind to drive it). A DIY mixer would work really well (NE602 would have been awesome but it's very obsolete, but there are some other possibilities), but you'd still need the 400 MHz-ish signal generation (I can't think of an easy solution for that, other than an off-the-shelf generator or module [or could use a diy oscillator and live with the drift]).

RE: Blog 5 – Software defined radio with the Red Pitaya STEMlab 125-14 PRO Gen 2

DAB — Sun, 01 Nov 2026 20:01:24 GMT

Nice update.

I like your persistence.

RE: Blog 6 – Developing for the Red Pitaya STEMlab 125-14 PRO Gen 2

DAB — Sun, 01 Nov 2026 19:44:29 GMT

I applaud your persistence in trying to get this hardware to work.

RE: Blog 6 – Developing for the Red Pitaya STEMlab 125-14 PRO Gen 2

shabaz — Sat, 31 Oct 2026 23:19:33 GMT

Personally I avoid cross-compiling if I can help it - it was attractive in the past (and is still done with microcontrollers all the time of course) but for application processors (which is what that Xilinx part contains) will have the performance, and there should be enough space to install a native compiler, and even if there isn't, there should be the capability to mount storage, and then build directly on the target. It eliminates all risk of having slight differences in the build environment. Even the raspberry pi people build their images directly on the Pi as I understand (they have banks of them usable as build servers).

I think it should have been the responsibility of Red Pitaya team to have provided an image and instructions as to how to perform builds directly on the target, and then they would not have given you all the problems you experienced - or, the Red Pitaya team would simply have had to throw more resources at providing a precisely matching SDK - and as seems to be the case, that's not all that easy, things go wrong.

RE: Blog 5 – Software defined radio with the Red Pitaya STEMlab 125-14 PRO Gen 2

Qbit — Sat, 31 Oct 2026 12:53:25 GMT

Great deep-dive into the SDR capabilities and limitations of the Red Pitaya! It's impressive to see how you systematically tracked down the format mismatch issues with rtl_433 and the CF32 stream handling.

RE: Blog 4 – Logic analyzer application in the Red Pitaya STEMlab 125-14 PRO Gen 2

colporteur — Thu, 29 Oct 2026 21:46:05 GMT

Confirm O, you purchased the extender module?

The pin picture is the probes. The pin is where a jumper would attached to Red Pitaya module?

RE: Blog 3 – Oscilloscope application in the Red Pitaya STEMlab 125-14 PRO Gen 2

jc2048 — Thu, 29 Oct 2026 21:29:29 GMT

Couldn't you have used a x10 probe to give a -10V to +10V input range?

RE: Blog 3 – Oscilloscope application in the Red Pitaya STEMlab 125-14 PRO Gen 2

DAB — Thu, 29 Oct 2026 20:08:58 GMT

From everyone's descriptions, you definitely need to fully read the documentation before working with this device.

RE: Blog 4 – Logic analyzer application in the Red Pitaya STEMlab 125-14 PRO Gen 2

DAB — Thu, 29 Oct 2026 19:51:19 GMT

Nice update.

RE: Blog 2 – First contact with the Red Pitaya STEMlab 125-14 PRO Gen 2

Qbit — Thu, 29 Oct 2026 10:42:20 GMT

Nice thermal benchmarks! and you are right, they should change the enclosure to something temperature resistance rather then PLA.

RE: Blog 2 – First contact with the Red Pitaya STEMlab 125-14 PRO Gen 2

DAB — Tue, 27 Oct 2026 19:19:51 GMT

Interesting.

At those temperatures I doubt the silicon will last long.

RE: Blog 1 – Unboxing the Red Pitaya STEMlab 125-14 PRO Gen 2 Starter Kit

Qbit — Tue, 27 Oct 2026 09:56:07 GMT

Thank you [mention:c7653d7a22e5406fabcabc369853dbca:e9ed411860ed4f2ba0265705b8793d05] for sharing the detailed unboxing video, and sharing the beauty of it!

RE: Raspberry Pi CM5 roadtest - Finally, the USRP is working

DAB — Tue, 20 Oct 2026 20:19:03 GMT

Very good update.

Well done.

RE: Raspberry Pi CM5 roadtest - Finally, the USRP is working

spinden — Tue, 20 Oct 2026 11:20:56 GMT

Awesome job!

RE: POST 9 Partnering SDR & GNU Radio ...Red Pitaya STEMlab 125-14 PRO Gen 2 Starter Kit

DAB — Fri, 16 Oct 2026 01:35:37 GMT

Nice update.

I admire your persistence, I would not have continued to flog this horse.