SDRPlay RSP1a, best gain settings.

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Tom Schuessler

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Apr 20, 2026, 11:43:32 PM (4 days ago) Apr 20

to SkyRoof

Although I have been promoting Skyroof in my amateur radio satellite talks and on the various satellite related nets I run, I have not had that much actual experience with the software until now. I did just get installed an M2 LEO Pack system and Yaesu rotor for tracking. Now I have something I can really play with and spend more time figuring out all the aspects of this software.

My RX is an SDRPlay RSP1a I have, like many users of the SDRPlay devices, been a bit confused by the way they categorize gains.

of the various gain parameters, AGC, RF Gain, IFGR and RFGR, what for the users here, are the best settings for the best gain out of the RSP1a?

Thanks much

Tom Schuessler, N5HYP

Sergey ER1KW

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9:48 AM (8 hours ago) 9:48 AM

to SkyRoof

I have SDRplay RSPdx and 2xFT818ND for satellites QSO.

RF=0, AGC=False - my only way to see moving watefall..
If AGC=True so waterfall stopped.
It seems my TX signal is too strong for my SDRplay RSPdx, hitting the receiver's gain, preventing the program from decoding and correcting it. There are so many interference signals on the screen, it's unclear what my primary transmitter signal is.

I have a 144 MHz filter on the transmitter (FT-818ND), but it doesn't help... the 435 MHz band is clogged with interference during transmission.

Second problem with my TX signal. It seems
Anyway, I can nor recognize my TX signal , too many interference signals on the screen...and very strong and loude audio.
And no way fix it using manual correction. As the result, my TX signal not managing by Doppler at all, no Sat QSO available...
Who can advice anything?

Thanks,
Sergey Konev, ER1KW