This is a recording of the first Danish satellite, Ørsted. A clear signal can be seen on the waterfall, but if you listen to the audio, a clear voice can be heard on top of the tone. It sounds like an AM broadcast station being demodulated with an SSB receiver, so you can’t make out what they say, and one minute before the end of the recording, you can hear music.
How is this possible on 2296 MHz? Also, the strength of the voice follows the strength of the signal.
The reason I started looking for this satellite is that there is talk in Denmark now about start listening to it again.
Also it found be the upper side band of the AM signal being demodulated by the lower side band part of the demodulator which causes a lot of distortion.
this would have been on my 2.4ghz parabolic grid, fed in to a ursp b200 mini.
That’s weird, and seems to be mixed in for all of my observations, and not impacted by doppler correction.
I looked at this frequency on my desktop and didn’t see anything local, but I do have a broadcast FM station next door which is likely where the signal is getting mixed in from. (the LNA has an FM notch filter in it)
If its intermodulation interference it could be “tuned in” to the resulting signal… That said, 2296Mhz is not mathematically an intermod product of the FM station next to me (100.7Mhz). The other stations on that same tower are around 851Mhz and would not be broadcasting continuously like the signal we hear.
this is where I brain-dump without a clear answer so I (or someone else) can dive in further later.
