Signal present line from a GP300
 

Hi with the GP300 by motorola, is there anyway of obtaining a line that
would change its' state when the squelch was broken, giving a PIC
processor an indication of state, ie if there is no traffic on the
frequ then transmit data ?

Is there any such indicator that can be sourced from the PL / CTCSS
chip etc. Providing that CTCSS was used.

HELP !!!

Andy.