SDRTrunk RSP1a adjust center frequency

[Phil Pang]

Is there a way to adjust the center frequency in SDRTrunk? I'd like to center the tuner around 771-ish Mhz if that's possible.

I'm using the sammy1am fork with a SDRPlay RSP1a. I've noticed that the app seems to have the CC centered, but in fact the system I monitor has frequencies from 769-774, which based on the spectral display is right in the fringe area where reception drops off and I do get some garbled voices due to that. But the tuner is going down to 767, wasting the bandwidth available. 

Thanks!

 

-Phil

[noko...@gmail.com]

I don't think that you can change it on the UI itself, as you said it automatically sets the center frequency. I had a similar issue with a system and an SDR that couldn't perfectly cover all the frequencies.

[Nick R.]

This should be a feature. I'm listening to a p25 system with an RSPdx that spans just shy of 8 MHz. The CC is toward the lower end of this range. There is one channel at the top SDRTrunk tries to tune to, but it is outside of the IF bandwidth range because the program insists on keeping that CC in the middle ( [   ----+-------]*- ). Ironically, the only time it does change is by putting one of the lower frequencies in the center, in which case half of the analyzed spectrum is completely useless ( [       ----+---]----*- ). Why it will tune down but not up is nonsensical. 

If I manually tune to a frequency in the middle of the spread, I can see each and every channel in the system pop up perfectly fine within the IF bandwidth range ( [----+--------*-] ). Without an option to adjust the center, the program is basically underutilizing the capabilities of the receiver.