Question about Garmin GPSMAP 430 GPS Receiver

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The squelch stays open all the time, had it programed fixed by lowering the adjust numbers. While in the air, other planes can hear me, in ground nobody can. Is it adjust wrong?

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Have interference after incoming transmission which remains til mic is keyed stays clear til after next incoming.


perhaps the squelch is set too "open". Try to program a tone code into the radios. Many times the manufacturer expects you to use a tone and they set the squelch too high, or open. This causes the squelch sound because the radio is trying to pull in weaker signals. If you are using a tone code, the model of the radio is needed to tell you if the squelch can be adjusted.

Nov 02, 2015 | Uniden Lot Of 3 Gmrs 10-mile Range Uhf...

2 Answers

I was given a uniden police scanner and I need to know the frequencies and how to get the static out. . Thank you . Rhonda Hansen


First thing to try is to change the "squelch" setting. If you squelch is set wrong, you will hear static all the time and the scanner may not scan. Turn the squelch until you no longer hear the static and the scanner scans.

Nov 07, 2014 | Radio Communications

2 Answers

Yaesu ftm-10e squelch problem


The FTM-10E is the european version of the dual band amateur radio capable of transmitting in the amateur VHF & UHF (144Mhz & 440Mhz ) bands, that is equal to the FTM-10R sold in the US.

Many repeaters require a predetermined sub-audible tone or signal to be sent when transmitting. If several repeaters in the area operate on the same frequency, they would all transmit at the same time unless they all have different sub-audible tones. These tones allow the user to select which repeater on the same frequency will be used. The tones are either CTCSS or DCS type. CTCSS is "continuous tone coded squelch system" and DCS is "digital coded squelch". CTCSS is expressed as a frequency in Hertz and DCS is a code expressed as a number. CTCSS is more popular, since it has been around longer. When programming or tuning the radio, you will need to provide the repeater's output frequency (and the input frequency if the shift direction and amount isn't programmed - often a 600 hertz shift either up or down depending on isn't already programmed is a default value depending on the repeater output frequency) and whether or not the repeater requires a tone. If it does require a tone (most do), you will need to know the type (CTCSS or DCS) and the value (frequency for CTCSS or code number for DCS) in order for your transmitter to open the repeater and cause it to repeat your transmission AND open the squelch on the radio's receiver so that you can hear replies to your call and other conversations. Repeater directories (both printed and online) will provide all the information needed to access a public repeater, including geographical location, input & output frequencies, squelch type and values to name a few.

If you do not have the correct CTCSS or DCS set, you will see the signal meter on the radio indicate traffic - but you will not hear anything because the radio is squelched. Check the manual page 40 for information on how to program the squelch, and page 42 describes the "shift" I mentioned above. Page 64 & 65 details the theory of squelch via CTCSS and DCS and will help you understand it better.

Basically, you have a "standard" squelch - the knob on the radio and a second squelch that is either CTCSS or DCS. Both types must be set to hear anything. Not having the CTCSS or DCS set will prevent your signal from being repeated by the repeater.

If you have more question, please add them in a comment. I hope this helps & good luck!

Jun 17, 2012 | Yaesu FTM-10R VHF/UHF Mobile Dual-Band...

1 Answer

How can i stop the squelch ive tryed turning the sqcuelch doesnt help


Plug the AC adapter into the back of the scanner and into a wall electrical outlet. Screw the antenna into the receptacle on the back of the scanner (extend the antenna to full length for best reception).

  • 2 Set the squelch level to allow signals to be heard by turning the squelch knob counterclockwise. Rotate the volume knob clockwise until you hear static. Slowly turn the squelch knob clockwise until the static noise disappears.
  • 3 Start programming frequencies into the scanner by pressing the "Manual" button.
  • 4 Press the up arrow or down arrow key until the channel you wish to program is visible on the display.
  • 5 Use the numbers on the keypad to enter the frequency for the local transmitter you wish to receive.
  • 6 Press the "E" key to complete the process of entering the frequency.
  • 7 Repeat steps 3 through 6 for each additional frequency you wish to monitor.
  • 8 Press the "Scan" key to start the scanning process. The scanner stops on a channel when it detects a signal strong enough to hear over the squelch setting. Two seconds after the signal stops, the scanning process resumes.
  • Dec 06, 2011 | Uniden BC248CLT Base Scanner

    2 Answers

    My blackbox radio breaks squelch only when button is pushed.


    I am familiar with radio programming software , but not your model. You could have squelch adjustments or settings that need to be set in the software end. Did you set something to mute? Can you set the signal level for the radio to open squelch? Are you able to connect to a service monitor and inject a signal and see where it does break squelch? These are things I would check.

    Aug 25, 2009 | Klein Electronics Blackbox-U 2-Way Radio

    1 Answer

    My Pro 96 does not come out of Squelch mode on any channels


    Are you hearing any communications at all? Sounds to me like someone has programmed the ctcss tones for each frequency. Try programming a frequency without a tone and you should get a squelch. If not then you probably have to return to the repair shop. GOOD LUCK.

    Apr 13, 2009 | Radio Shack Pro-96 Scanner

    1 Answer

    Uniden UH-013 squelch


    Had an issue with this unit since new. Squelch adjusted too high. Not hearing some signals showing on meter. Solution - find a trim pot labelled "Meter" on the PC board and adjust it like a knobby squelch control. Made a big difference to the number of received stations. Down side is I need to use SQT tight squelch sometimes.

    Feb 20, 2009 | Radio Communications

    1 Answer

    Radio Mic


    Check the squelch on your radio thats not recieving. If there is a monitor button ( when pushed you will hear static) try pushing it.. then get someone to call you so you can check if you can hear them. On these radios you have 2 types of squelch....1 is called carrier squelch.... it basically opens when there is a strong enough signal. This lets you only hear strong signals and "squelch out" the distant ones and background static. The2nd. is "tone squelch" ... with your radio they are often called privacy tones. If you have 2 radios set with the same privacy tones you will only be able to hear each other... only radios that are transmitting with that privacy tone will be heard on your radio. Its a high frequency tone that can't be hear by the human ear that gets "embeded" with the transmitting signal. The recieving radio hears it and opens the squelch. So... if the radio thats rxing (recieving)your signal has its squelch set for just carrier squelch it will hear any signal thats strong enough to break the squech open.... basicaly any radio within a certain range. But if your radio (one with problem) has its squelch set for privacy tones you will not hear any other radios except the ones set with the same privacy tone.... the squelch will not open until it gets a tx signal with the right tone.... so if the txing (transmitting) radio is not using tone squelch but is using carrier squelch.... and the rxing radio is set for tone squelch... the rxing radio will not hear it. With tone (privacy tones/codes) squelch you need a tone to open the squelch and then the audio can be heard... with carrier squelch the squelch will open if ANY radio is within a certain range. Check the squelch setting on the problem radio... it could have a privacy tone set. Try pushing in the monitor button so you can hear static ( you want to hear everything including static) on both radios... tx on one radio at a time and listen if it can be heard on the other with the monitor button pushed. If you can't hear any audio when the broken one is transmitting then it COULD be the mic.... if you can hear both radios with the monitor button activated than the radios are txing and have tx audio and are working... if thats the case its the privacy tones that are the problem. Take care

    Sep 12, 2007 | Garmin Rino 120 2-Way Radio

    2 Answers

    Squelch is open all the time


    Often the potentometer (squelch control) becomes worn or dirty, this can be sometimes cured by spraying a WD40 or similar oil and then rapidly moving the control down and up. Do not use oil that is conductive.

    Sep 11, 2007 | Radio Shack Pro-2096 Base Scanner

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