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Old 06-06-2020, 11:33 AM
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tempestwizz (Brian)
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tempestwizz is offline
 
Join Date: Jun 2005
Location: Townsville, Australia
Posts: 208
Sounds a bit like interference from another source. Normally the agc (automatic gain control) in your receiver should knock down weaker interfering signals, but propagation is fickle.
If you are using a directional antenna already, maybe you could try rotating it to tune for minimum interference (rather than the usual - maximum signal). If you have good signal strength normally, you could also try changing the polarisation of your receive antenna. (ie rotating from horizontal to vertical orientation) That will (theoretically at least) drop the receive strength by 26 dB.
Not sure what the frequency band that your tv source is operating at. That might provide some clues as to what the interference source may be.
In my time, Digital tv used to be in the vhf band around 220 MHz, but I’m not sure what frequencies it uses these days.
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