Regarding Observation 1194164 …
This observation was automatically marked as Good, which I assume is because it has ‘decoded’ two CW data fragments (“ETEH” and “KKAT”)… however I cant really see a straight line in the waterfall that would indicate a Doppler corrected signal, is this data just spurious noise which happens to make it through the decoder?
Also I see the noise pattern on the left around 145.850 MHz, which I assume to be terrestrial from the post Doppler correction output on the waterfall, but I am curious as to why this appears to pulse about once per second and wonder if this is overloading the RTL-SDR?
Note I have +10 dB LNA with 2m bandstop filter which is tuned to 137mhz, and looks to have about -4 dB loss at 146 Mhz but tapers off pretty quickly so shouldn’t be any significant amount of out of band signals hitting the LNA…
However the RF chain is not shielded beyond an Alu case for the SDR and ferrite rings on the 1m usb extension, could the SMA connection between the LNA and SDR could be a weak spot that is picking up local interference?