On 13 Nov 2005 06:53:33 -0800, "BIGSteve"
said in rec.radio.scanner:

So if i tap the descriminator chip then somehow hook it up to the
computer is there a program that will let me hear the trunked system?

There's a program (maybe more than one) that will provide serial port
signals to a scanner that can be computer controlled (only Uniden
scanners can be controlled that way at this point) to make it follow
the trunk groups. But it can be a cheap scanner - as long as it can
be computer controlled and it can cover the frequencies you want. It
doesn't even need a working keyboard or display, since you're not
going to be controlling it, and the computer can't press the keys or
read the display.