That little bit of code I put here only really helps if the carrier of interest is somehow spread across 2 or 3 spot frequencies (bins in the FFT world). Otherwise it has little to no effect at improving the indicated frequency. It's main use is with FFT's, but I thought might help here too.
I haven't looked at the receiver architect in your TinySA, so I don't yet know how you detect the amplitude of the carriers as you scan across the frequency range. Do you just have a single real value given to you from the detector chip, or do you have an I/Q pair which you use to create the power spectrum lines I wonder ?
Is there a schematic available ?
Mines been working OK, though have noticed a couple of firmware bugs at times. I really like the unit, extremely handy for RF sniffing while out in the car, interesting what you come across at times ;)
