tywazzu wrote:
When i listen to the fire channel...there is a tone that last for a few seconds, then they tell whats going on. I believe its called tone. I see firefighters where a little pager on their belt, is it like a scanner?
You are most likely hearing what is called "2 tone paging". Sometimes it is a long single tone (group code), so don't let the term confuse you.
As other posters have mentioned, Minitor pagers can be programmed so the person carrying them does not play any radio traffic until they are called. Nowadays many 2 way radio manufacturers sell radios that can be programmed to decode these tones.
Dispatch sends the tone(s) and then speaks. The pagers (and many 2 way radios) may be programmed to open squelch upon recipt of the tone. Then the person carrying the pager (or radio) can hear the call.
I am not aware of any scanners that will decode 2 tone.
ICOM offers an F50/F60 portable, and F121/F221 mobile that can be programmed to decode up to 10 different 2 tone (or long single tone "group") codes.
73's
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