Regarding Observation 10472886 …
I have been trying to figure out why my ground station has so much noise. It is too consistent, and the intensity doesn’t change with direction, so I don’t think it is from my environment. I even turned off my rotor to make sure it wasn’t causing any noise and increased my gain. Has anybody had a similar experience or have any advice on how to cut down on the noise?
I would say its from a source on the ground as there is no doppler correction taking place i.e. the lines are going diagonally across the waterfall as the ground station corrects for doppler. If doppler correction took place from a moving object then the signal lines would be a vertical as its corrected for the doppler shift.
check all your connections make sure there is no other electrical equipment near by or anything else that could create interference.
are you near to an airport? as the frequency 137.000MHz is very near to the aeronautical band you could be picking up interference???
I am at an aeronautical university, so we have an airport a few miles away and have planes flying over constantly. But this has been persistent 24/7 and, on every observation, across a wide range of frequencies, which is why I suspect it might be part of my rig
The signals you’re seeing looks like those of an RTLSDR with a USB problem. My RTLSDRs sometimes get into this mode after many observations. Try unplugging it from the USB port.
Do you allways run the rtl-sdr on a gain of 2.7 dB ?
And can you run some rtl_tcp or alike tool to take a spectrum view of the same band to check the gain settings and which frequency the noise is from ?
Good to know, we are ordering some backups and will swap it out just in case.