Possible aliasing in CW decoder
Observation 6121325 shows the CW signal of 49274 at 437.3784MHz, but also the CW signal of 42790 at 437.4015MHz. This signal is absent in a simultaneous STRF recording, which only shows 42790 transmitting at the known frequency of 437.2440MHz. It appears the strong CW signal of 42790 is aliased into the 48kHz bandpass of the CW waterfall. The frequency difference of the alias with the fundamental is 0.1344MHz, which is 2.8 times the 48kHz waterfall bandpass.
Does the factor 2.8 make sense in explaining this alias given the flow-chart parameters? Can the out-of-band signals be suppressed further?