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I have a question

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bravo14

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For many years I have heard this tone in between radio transmissions, and I have a clip from Chicago fire department with the to e and wondering what brand and who owns it and what is it called, it is in the start of the video
https://youtu.be/xmtbYaNiV-k

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I believe it's Xmit for that tone. Not sure what radios puts that out.
 

riccom

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gatekeep

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Thats a tone remote signal, this signal isn't generated by subscriber radios and usually goes unheard. Its generally used with a voted reciever system. You tend to hear it when PTTs from subscriber radios are quick enough that the transmitter does not drop.

The tone remote signal is generated by the radio infrastructure to tell the transmitter for that specific channel to start transmitting.
 

cmjonesinc

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Yes that's it, I wonder what i need to have one or make one

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Its commonly called a "pilot tone". Normally they are 2175, 1950, 1600 or 2700 hz. and as mentioned above used for voting systems. If you have a radio capable of transmitting a single tone you can program it for one of those tones. You'll just have to play with the lenght. I've had several Motorola's with this feature and it's pretty common with commercial equipment. With Motorolas you can set a tone for the beginning or end of transmission. Some radios there's also an option to program a tone when you key the radio that doesnt go over the air. It's just to let to user know they hit the ptt button.
 
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