If a PSK signal is weak, do I gain any better reception turning up the AF gain? I can see an increase in snow on the screen. Not sure what is the smart way to operate. So, how much snow on the waterfall is detrimental? Thanks in Advance.
Yes and no.
No, increasing the volume level will not increase the signal to noise ratio, which is the baseline for discriminating a signal out of ambient noise. A better antenna, more antenna height, less interference noise can all help.
Yes, most decoders work better when they are fed a 'strong enough' signal. So if you have the volume level too low going into the decoder, the decoder has a more difficult time decoding the spectrum you are sending it. I have found over the years of playing with pskreporter.info that I got a higher number of decodes per day if I have the audio input pushed as far up as possible without running into signal overload.