2017-07-19, 11:20
The LP filter requires the optional chips to be installed and to be honest that little bit of noise around 120 kHz I'd not worry about. Take a look at my station for noise/interference. Currently unfiltered in manual, equal gains but with higher threshold for the second channel.
What I do find curious from your station is that only Ch1B (yellow on LMO) is predominantly reported with only the occasional Ch1A (red). The red channel also appears to have a large spike a bit above 20 kHz that doesn't appear on the other channel. And when the red channel does appear it's signal doesn't really match that on the yellow. OK they rarely do match but are normally a similar shape with the peak levels different, the phase isn't important. Something not quite right with the antennas?
What I do find curious from your station is that only Ch1B (yellow on LMO) is predominantly reported with only the occasional Ch1A (red). The red channel also appears to have a large spike a bit above 20 kHz that doesn't appear on the other channel. And when the red channel does appear it's signal doesn't really match that on the yellow. OK they rarely do match but are normally a similar shape with the peak levels different, the phase isn't important. Something not quite right with the antennas?