jwpauler wrote: >Jay, Ed & All... > >Thanks for the pinout list and RSS advice, I'll try all of that tonight. > >In case it matters... The RSS I'm using is for the GM300's, which >works great for those radios, I can program the option pins on the >accessory connector with this software; when connecting a M120 and >using the same software, I have the ability to program the radio, but >I loose the option to customize the pins! This doesn't make sense! > >Again, what I'm seeing doesn't match even the service manual listing >below, two of the pins see a 0.00vdc voltage at idle, and a 6.56vdc >change when a valid signal is received. > >Thanks everyone! > >Justin > > Justin,
It is the audio output IC going to mid voltage when the receiver is unsquelched. The audio output is a bridge mode device and sits at mid voltage when enabled. When muted, it shuts down to lower its power consumption. Try using pin 8 for your COS. Ed Yoho WA6RQD
