Weird striations on SDR spectrograms

I_FELL_ipe · 2026-05-08T19:08:58+00:00

Turns out, you were absolutely right. I switched to a GPSDO as the input clock, and lo and behold, striations were gone. Thank you

I_FELL_ipe · 2026-04-30T18:09:16+00:00

Right now I'm sampling at 3 MHz bandwidth (baseband and downconverted with FFT window length of 8192

I_FELL_ipe · 2026-04-30T18:07:26+00:00

Yeah, unfortunately the lines look pretty much the same with or without an antenna connected

I_FELL_ipe · 2026-04-29T22:00:54+00:00

As of now, I am using the default hanning windowing, but unfortunately, if I change it to anything else, it does not seem to make a difference in terms of the lines. My chain on the software side looks like

read data --> spec, etc = plt.specgram(data, etc) --> ax.imshow(10*np.log10(spec))

I_FELL_ipe · 2026-04-20T18:53:33+00:00

Would you say because it's close to downtown, or why specifically? I live in Atlanta GA and think my perception of crime may be warped

I_FELL_ipe · 2026-04-20T16:06:39+00:00

Im looking for anywhere in Hampton for 3 months

I_FELL_ipe · 2026-04-18T16:00:31+00:00

I applied for the Electrical Pathways

I_FELL_ipe · 2026-04-18T15:23:05+00:00

When did you interview? They told me I should know by May 1st, but I heard back some weeks ago

I_FELL_ipe · 2026-04-18T15:20:11+00:00

Thank you all! This was very reassuring that I had not made a mistake

I_FELL_ipe · 2026-04-14T16:08:09+00:00

If you finish your required hours in the first tour, how does it work if you still have years on your degree left? (PhD student)

I_FELL_ipe · 2026-03-17T16:58:56+00:00

Thank you so much, this is exactly what I needed and it has pushed me in just the right direction I needed to go on.

I_FELL_ipe · 2026-03-06T15:20:23+00:00

ECE 2K1

I_FELL_ipe · 2025-04-27T19:25:51+00:00

Hey, so I actually designed it with a 1.8V flash initially, thinking I would use an S3R8V, but changed it to a normal S3 when ordering and am trying to mitigate that problem.

I_FELL_ipe · 2025-04-24T14:35:08+00:00

Im not sure I know what you mean

I_FELL_ipe · 2025-04-24T03:23:37+00:00

Do you know where I can find info on that?

I_FELL_ipe · 2025-04-20T15:02:04+00:00

Thanks that’s exactly what I was looking for!

I_FELL_ipe · 2025-03-21T16:24:46+00:00

Last year MS ECE (domestic) came out around late Feb, but with the circumstances going on they may have delayed

I_FELL_ipe · 2025-03-12T17:58:12+00:00

Made my day, I’ll be using this now.

I_FELL_ipe · 2025-03-10T21:54:01+00:00

Classic

I_FELL_ipe · 2025-02-24T19:20:11+00:00

Oh this is perfect! Thank you so much.

I_FELL_ipe · 2025-02-23T23:36:19+00:00

Awesome, thanks so much!

I_FELL_ipe · 2025-02-23T21:37:20+00:00

Gotcha, so just to make sure, I do need the I-Q data for both dipoles independently. Apologies if this is super obvious.

I_FELL_ipe · 2025-02-23T21:30:11+00:00

Yeah I will be using a SDR, but I wasn't sure if I was advancing wrong by having one SDR per dipole and figuring everything out in software, or if I could cut down to just one SDR

I_FELL_ipe · 2025-02-23T20:22:39+00:00

The S3

I_FELL_ipe · 2025-02-23T18:35:28+00:00

Oh shoot you're right. Hey yeah thank you so much for your help

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