Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [squelch]

A function of receivers which mutes the audio when no signal is present; there are various and mode-dependent ways of making this determination. For PL/CTCSS in particular, use the [tone-squelch] tag.

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How does the baofeng radio eliminate squelch tail?

All tests are performed in Carrier Squelch mode on all radios without any sub-audible tone or digital squelch involved. Scenario 1: The Baofeng handheld radio Keys up. Another Baofeng is listening. When the transmitting Baofeng un-keys, the…
Skyler 440
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My Baofeng UV-5RV2+ will receive a signal with rubber duck antenna but not with a new Nagoya

I bought my self a Baofeng UV-5RV2+ as an inexpensive way to introduce myself to the world of ham radio. With all of the stock components everything has been working fine. I wanted to try to increase the radios performance so I purchased a Nagoya…
T12mack
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Squelch never seems to "open the gate" on Wouxun KG-UV9D

I just got my Technician's license a few weeks ago and I'm trying to figure out if this is user error or if I need to return my radio. My understanding of squelch is that when the received signal strength exceeds the squelch threshold the radio…
Matt KI7CMZ
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Why does P25 occasionally break through tone squelch on my analog HTs?

When listening to our local repeater, which is now a combined P25/analog machine, every once in a while my squelch opens to a blast of digital noise. I've noticed this problem with at least two different Baofeng radios (a UV-3R+ and a UV-82). I have…
MoTLD
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FM squelch SDR algorithm?

What signal characteristics in an SDR receiver signal path should be evaluated or computed to determine whether the audio output should be squelched or not? What sort of computed result should be compared against a scalar squelch "knob" setting? I…
hotpaw2
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What's the difference between the normal and S-meter squelch in IC-2730?

I recently obtained an IC-2730E and can't figure out the difference between its squelch options. Unfortunately, the user manual isn't very helpful. The squelch option had 3 types: off, attenuation and S-meter. From what I could gather, the…
AndrejaKo
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BF-F8HP radios do not receive on 2m unless menu is open

I just got 4 BF-F8HP radios, 2 knockoffs, and 2 "legits"; definitions of knockoff and legit come from a website I found. All 4 of them are having this issue. I can transmit fine on both 2m and 70cm, and I can receive on 70cm fine, but I can only…
Jereme
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Squelch won't stay open on FM 2 meter band

I am currently using a Baofeng BF-F9V2+ radio. I have found that when listening, my squelch won't stay open, despite getting a good clean signal. I am using a homemade vertical dipole antenna for 2-meter band. Compared to the rubber duck, it gets…
Addison Ballif
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Performance gain when turning off CTCSS/DCS?

By turning of CTCSS/DCS can there be an increase in performance*? *Performance: Battery life Latency Range Voice quality From what I understand CTCSS/DCS is extra work for the IC inside the radio. Of course it is going to be minuscule, but will…
user160357
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Bad squelch on a TYT MD-380: user error or hardware?

I have a new TYT MD-380; it works well for DMR channels, but on analog, the squelch doesn't seem to open when it should. I'm relatively new to ham and my first suspicion is user error, but it's tempting to blame it on poor hardware quality…
K0SWE
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Squelch sensitivity decreased when antenna is connected

I have a radio with a really horrible squelch. When the knob is all the way to most sensitive, the squelch has problems, the noise is not constant, the noise comes on and goes off. When the antenna is disconnected, I hear the noise when the squelch…
Skyler 440
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How does a Baofeng radio know an incoming transmission is from a repeater?

Baofeng radio's have two menu options for squelch tail elimination (STE). Item 35 is for general simplex STE, and item 36 is for repeater STE. My question is how would the radio know if a transmission is coming from a repeater in order to apply the…
N4lnt
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Soften the squelch tail sound in Baofeng radio

I have some Baofeng radios, and I set their Squelch Tail Elimination (STE) settings to OFF because I like that there's a signal when the transmitter has ended and when the receiver can start transmitting. However, the squelch squawk at the end can…
ajthealchemist
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Newbie needs help with Wouxun KG UV9D Plus

Just got a radio (a Wouxun KG UV9D) from someone that is supposedly "new in box" although I'm really struggling with being able to listen to anything with it. Not sure if it's me or if it's the radio. Things I have been able to do -- listen to FM…
Rachel
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How can I determine the possible damages of transmission with detached antenna in portable ham radios?

Premise: I had a Baofeng GT-3 TP Mark III 8W stored and never used, this morning my nephew has found It and He tried to "play with It" transmitting at maximum power(8 Watt) despite antenna wasn't attached, (seems He has transmitted for several…
AndreaF
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