Vast majority of scanners made within the last 4-6 years have frequency counters that only work at close range.trafficninja said:Are there any scanners on the market that can detect the presence of a certain frequency or frequencies nearby? I already know the frequencies, I just want to be alerted when they're nearby. How about on a busy frequency?
I already know the frequencies, I just want to be alerted when something nearby is using it. It needs to be specific frequencies. I don't think Close Call, for instance, would do that?capt_clint said:Vast majority of scanners made within the last 4-6 years have frequency counters
You could go on ebay and buy a cheap scanner for several dollars and have the frequencies put in this scanner and leave it scan all the time this is what I do for several frequencies I want to listen too all the time and not miss anything and not tie up my bc396t scanner.trafficninja said:I already know the frequencies, I just want to be alerted when something nearby is using it. It needs to be specific frequencies. I don't think Close Call, for instance, would do that?
There you go !, I bought a Radio Shack Pro-2045 on ebay for $ 35.00 dollars and use it for several frequencies, police, fire, ambulance, coast guard, and a couple of others, it came with a little plug in back antenna and I leave it in the corner of the room running 24/7 and it works perfect.Don_Burke said:A cheap scanner with a lossy antenna or without an antenna would seem to fill the bill.
Actually...I'm thinking APCO25 control channels. From my very quick reading on APCO25, it's my understanding that all radios in a talk group transmit to the zone controller on a regular basis via the control channels. I was thinking along the lines of the beartracker functionality of the BCT8/12 etc...scanfan03 said:Most new scanners also have an audible or led alert for channels. I'm not quite getting what you would use this for though? When you hear a close frequency being used, most of the time someone is talking on it? So you would hear people's voices.
Smartzone controllers ping idle (on, but not being keyed up) subscriber radios every four hours; I imagine APCO25 systems do the same thing.trafficninja said:Is it true that all the radios in a talk group report their presence to the zone controller on a regular basis?