Question about Radio Communications
Posted by Anonymous on
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Posted on Jan 02, 2017
Many two-way radios have a Monitor function that disables the squelch control. The squelch is what keeps the radios quiet when they are not receiving an incoming signal. However the squelch feature can also cause weak signals to cut out and not be understood, so the Monitor function provides a way to disable the squelch in those circumstances. It sounds like you have the Monitor enabled / squelch disabled on the units that you hear constant static.
For the Cobra MicroTalk 4100 it appears that you enable the monitor by holding down the Light/Max Range button for 5 seconds until the radio beeps twice. You may have activated this function inadvertently. To disable the monitor and re-enable squelch simply press the Light/Max Range button again or change channels.
If this doesn't fix the problem there may be a problem with the auto squelch function on the radios. Or the channel you are operating on may have a noise level that is above the radio's squelch level. You can try changing channels. Or another possible solution would be to activate the CTCSS (Continuous Tone Coded Squelch System) on all the radios. This function will mute the radio's receiver unless a signal is received from another unit using he same CTCSS code. This should keep the units quiet regardless of the noise level on the channel. However all the radios MUST be set to the same CTCSS code or they will not be able to communicate with each other.
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Posted on Jul 07, 2008
Sounds like the radio was subjected to electrostatic discharge. If you have your manual, and it describes a way to do a "master reset" on the radio, follow the instructions. This usually involves pushing down on one key while turning the radio on. Otherwise you have to find a licensed dealer for factory service, as there is no way to repair the radio yourself. The use of surface mount technology still confuses many Techs unless they have been to a company's two or three week seminars.
Posted on Jul 24, 2009
No, the radios should be silent (squelched) when not receiving a transmission. Appliances (computers, televisions, even refrigerators) can generate enough "hash" to break the squelch and give you that "rushing" noise. Make sure that the radios are at least 4 or 5 feet apart, and try moving them to different locations to clear up the problem.
Posted on Jun 02, 2010
Testimonial: "Squelch was failing on both handsets for some reason. Took back to shop and exchanged. Thanks for your help."
depending on what radio you have, they are programmed in different ways, rx means recieve signal
and tx means transmit signal, if you have a mode button, you will have to scroll through it until you
get to the menu that allows you to change the radio transmission. it looks like that radio is only
programmed to receive signals and not transmit. good luck!
Posted on Mar 10, 2011
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