1 Answer

In laymans terms I'll try not to be too technical here, (Maybe because I'm not quite so sure myself) basically a frequency counter is a tool used by radio manufacturers, Programmers etc. to fine tune radio transceivers to check the frequency output of a radio, the frequency counter is constantly "listening" for frequencies being transmitted when it receives (hears) a frequency the frequency received is displayed on the lcd screen. This little tool has now been adopted by Scanner enthusiasts for finding radio frequencies, Imagine you are in your shopping precinct and you see a shoplifter being chased by a security wouldn't it be good to know the frequency that security guard is transmitting on? Well with a frequency counter you will have his frequency logged as soon as he keys up his radio.

http://www.ukmidlandscanner.co.uk/freqcount.htm