this post was submitted on 09 Feb 2024
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After some more toying around and reading, I think you’re right. There’s a periodic strong pager signal at 152Mhz that must be bleeding into my 148Mhz signal range a bit. I’ve already got a SAW filter that’s cutting it down substantially, so I don’t think it has much impact on the actual data.
Now to work on decoding that pager signal…
hmm, 152MHz seems quite a long way out from 137MHz to cause issues, but if it's very strong I guess that could the issue.
Yeah, the only reason I'm leaning towards it is because the typical periodicity and duration seems to match with my dropouts. I might try running an experiment with two SDRs tuned to the different frequencies to see if they line up.
Yeah, I was going to suggest that if you had a second SDR
137MHz is also quite close to the airband, sometimes nearby aircraft can cause overload
Oh that’s very interesting. We live right next to an airport! Planes flying around all the time.
I’ll have to take a look at that.
yeah, that might do it