But the other point that Paul (or was it Clemens?) made is that the 'trick' for magic SNR reports in WSPR is just to narrow the BW below 100Hz. 73 Clemens DL4RAJ -- Original Message -- From: andy.g4j
Yes, as Paul suggests, it does look as if AGC is the culprit. Narrowing the Rx bandwidth right down to 7Hz won't make any difference to decoding ability provided there is no AGC pumping from out of
This phenomen,or rather bug,has been reported here by several list members. I have made the same observations. Reducing the RX BW from e.g. 250Hz to something below 100Hz results in an increase of *r
Andy, maybe the "magic" lies in a narrow filter (either IF or audio). If I switch from a 2.5kHz (SSB) filter to a 270 Hz filter I also get a significant increase in SNR values reported by WSPR. Unfor
All the critical filtering is done in the software, and results in a 1.46Hz noise bandwidth - which is what the software measures and reports upon. Your observation that a narrower IF bandwidth is
Andy, I am using a Kenwood TS440 where the AGC cannot be disabled. Strong signals and/or QRM-QRN ofter affect the AGC, but far less at 270Hz bandwidth. Maybe the AGC action affects on the reported SN
