[aprssig] FW: FM Squelch blocks everything!

KF4LVZ aprssigZbr6 at acarver.net
Fri Feb 3 14:52:54 CST 2017


You have a defective or poorly designed radio that won't show the signal
strength regardless of the squelch setting.

On 2017-02-03 05:58, Robert Bruninga wrote:
> Fired up our next UHF cubesat card for first test and the ground station got 
> full S9 carrier but signal was full of noise totally masking the data tones.
> 
> Turned off.  Channel was clear. Then opened squelch and there was S9 noise over 
> 5 Mhz around our UHF downlink.
> 
> Went down the  halls with HT and signal tapered slowly down in all directions.
> 
> Came back and with 1” of wire in the HT antenna connector narrowed it down to a 
> cheap battery charger.
> 
> Lesson over and over again, is that a squelch HIDES everything  Even 20+S9 noise 
> sources.  Zero bars while squelched.



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