10
According to the detailed menu descriptions on the Miklor site:
35 - STE
Transceiver - Squelch Tail Elimination
This function is used eliminate squelch tail noise between UV-5Rs that
are communicating directly (no repeater). Reception of a 55 Hz or
134.4 Hz tone burst mutes the audio long enough to prevent hearing any squelch tail noise.
...
5
The simplest squelch, applicable to almost all modes, and the one provided by most amateur radios' “squelch knob” as far as I've experienced, is power squelch: measure the signal power (in SDR, $I^2 + Q^2$), average over some short time interval, and compare against a threshold. This is done before the demodulator as the demodulator removes amplitude/power ...
4
The fact that you have a static free signal when you press the monitor button or open the squelch sounds like you may have CTCSS or DCS decode (receive squelch) turned on. This feature is normally used to ensure that the squelch does not open on your radio unless the repeater or station you are monitoring transmits its sub audible tone or digitally coded ...
4
I'm not familiar with the exact behavior of that model of radio (and the manual was not very helpful), but a possible explanation in general is that you have CTCSS/DCS squelch enabled, and the repeater is not using the same tone/code.
However, for this to match the observed behavior it would have to be the case that a squelch setting of '0' disables tone ...
3
If your nephew damaged the Baofeng GT-3TP Mark III, the damage is likely to the transmitting circuits of the radio, and not to the receive side. I don't have that model of Baofeng, but I do have a different model, which is notorious for having difficult-to-adjust squelch. On several channels I can't get the squelch to stop the radio from playing static. ...
3
https://www.gpscentral.ca/manuals/Icom_IC-R8600_ENG_Manual.pdf
Page 21 explains the difference between regular squelch and s-meter squelch on any Icom radio.
Noise squelch
The Noise Squelch allows the audio to be heard only while receiving a
signal that includes less noise than a set level.
Activates when the squelch level is set to between 30% and 50% in
...
2
I can think of two possible issues, but both of them are "something to do with the radio".
The first is that something in the signal you're listening to is tweaking the Baofeng squelch tail eliminator. The answer to that question describes menu options that can stop a radio from transmitting the STE tones, but my understanding is that there is no way at all ...
2
According to the web, your Nagoya NA-320A works on both the 2m and 70cm bands, matches the reverse-SMA antenna connector on your Baofeng, and works reasonably well. So you probably chose a reasonably-good model of antenna. Your new antenna might be broken, or there could be something wrong with your radio, or your radio might be set up incorrectly. (Do ...
2
There seems to be quite a bit of confusion. First you should tell us if the squelch is for a VHF/UHF set, or some HF equipment. They are very different!
A VHF or UHF squelch works by detecting the disappearance (or at least lessening) of noise. That means you can't turn the knob clockwise for increasing sensitivity. The 'most sensitive' point is the point ...
2
Thanks all for the tips. Going back to stock firmware fixed the issue.
My radio reports hardware V05.01 and came from the factory loaded with firmware D014.009. I loaded md380tools onto it, which right now is based on D013, but I suspect that's incompatible with my hardware generation.
TYT sent me D015.001, which appears to fix the issue.
1
Whenever you can hear when monitoring analog but not in normal operation, start by suspecting the way the CTCSS tones are set up.
Make sure the Band Width setting is 25 kHz (for most analog repeaters, this corresponds to "WIDE" on the Baofeng).
Make sure the CTCSS Decode is set to OFF or Carrier Squelch (CSQ).
Make sure the CTCSS Encode is set to the value ...
1
It could be a bug in the repeater controller (it's perfectly possible to transmit digital data with a PL tone), but I'd suspect the Baofengs as your problem. They're not the best radios, and they're priced accordingly. Borrow a better HT (ideally Icom, Yaesu or Kenwood, but Alinco makes pretty good handhelds too although they're harder to find) and see if ...
1
Can't speak from experience with this radio, but I looked at the manual and it says about the option that:
Squelch/ATT select FUNC — SQLTYP
Sets to use the S-Meter Squelch or the Attenuator function for the
[SQL] control.
The way I would read this is that it does not change the squelch behavior but controls whether the knob changes the squelch ...
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