Having read through the relevant messages on the topic of Squelch, it was not clear whether there is an answer other than "get a different radio" to the problem of why the radio randomly decides a carrier is present (when one is not). So I thought I'd see if anyone has identified a workaround.
My usage scenario is typical - I would like to use the UV-3R+ to monitor local repeater channels while I am at home doing my usual daily activities.
However, instead of sitting silently, the radio periodically emits a burst of noise as though it detects activity. On several/many channels, the squelch gets opened up for a very short period, sometimes far shorter than a second, other times for 5-10 seconds. This repeats sporadically at some random interval.
I tried a few things so far to resolve it:
* Enabling a receive tone just blocks "real" transmissions from the repeater.
* Different squelch levels did not really seem to make any difference. But I will try going back to level 5 which was the default and try again.
One big question I have is whether other typical RF emissions in a home, such as Wifi access points, would cause this to happen?
Has anyone tried looking into sources of RFI in the home environment to see if they contribute?
Also curious if there are any other settings besides SQL that could be changed in the radio that might help?
FWIW, my other HT is a TYT-UVF1 and it does not show this problem in the same environment at home. I was thinking of getting another UV-3R but hesitate to do so with this behavior. Does the UV-5R have the same problem?
Willie / AC0UK