With radio off all is quiet in cabin of 2010 edge. with radio on hissing noise starts within 5 minutes. amplifier problem?

SOURCE: My Binatone Marina 300 Walkie

Hello andy300,

Does the "RX" indicator show on the LCD screen constantly?

This radio does have a monitor function which disables the squelch control, allowing the user to listen to weak signals on the channel. Enabling this function in absence of any signals will cause the user to hear any background static or noise on the channel. You enable this function by pressing Menu + Up at the same time and disable the function by pressing Menu.

I assume that you are familiar with this function from the fact that you mention these keystrokes have no affect on the radio's behavior.

It is possible that the area you are using the radios in / channel you are using them on has a very high noise level. If the noise level is higher then the radio's automatic squelch threshold, then you would hear constant static, hiss, or white noise and the receive ("RX") indicator would show a constant signal. A local noise level can be caused by atmospheric conditions or very busy nearby adjacent-channel radio signals.

Try operating the radios on a different channel and see if that helps. If it is practical, you might try operating the radios in a different local area just to see if that has any effect at all. This would help you determine if the problem was a local one specific to the area you are operating in.

If it is local area related you might consider switching to a different model of radio that includes a Continuous Coded Squelch System (CTCSS) function (called "privacy codes" or "quiet tones" by come manufacturers. This function does not appear to be included in the model you are using and can help keep your radios silent unless you receive a call from another radio using the exact same privacy code.

If the problem persists regardless of channel or area, then you might have a problem with the radio that would require factory service.

Hope this helps. Best regards!
Ken
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Bill Hower

• 75 Answers
• Posted on Dec 31, 2009

SOURCE: Garmin Rino 530 radio noise even with squelch turned up. Hissing

Are you carrying a cell phone with you at the time? A cell phone can interfere with these units. You may want to call Garmin to ask questions on this problem. They are very helpful and professional.