Interesting pulse at slightly lower than listening frequency

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samjaynes
Posts: 1
Joined: Wed Sep 30, 2020 5:11 pm

Interesting pulse at slightly lower than listening frequency

Post by samjaynes » Wed Sep 30, 2020 5:15 pm

While listening to a station, I noticed that the upper graph will decline to around -45, and then a pulse appears a frequency lower. If I move to that frequency of the pulse, the pulse happens again at a lower frequency. I doubt that has anything to do with the repeater

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rtlsdrblog
Site Admin
Posts: 2773
Joined: Mon Nov 19, 2012 11:54 pm

Re: Interesting pulse at slightly lower than listening frequency

Post by rtlsdrblog » Wed Sep 30, 2020 11:42 pm

This is a strong signal which is causing the SDR to overload and generate images. If you search around the spectrum you should be able to find where it is strongest, which is the true frequency it's broadcasting at.

You can then look into making filters to filter it out.

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