Just get a ASL node running with DRA-45. I have set the COS Jumper on the DRA-45 and program the Kenwood 8180 to send “COR or Channel Busy” signal on the DB25 PINs.
However, it looks like the COR signal only lasts about 5 seconds. ASL will recognize about 5 seconds of RX audio and then switch to TX with courtesy tone. Anyone has ideas on how to make it work?
That’s weird. The a look at the actual level on the pin. Is it changing after 5 seconds, too?
I tested it with my multimeter. Normally, when radio squelch is closed, COR and Ground has about 4.9V. When radio start to RX, the voltage on the COR will first drop to 0 for about 3 seconds and then 115mv. I guess the 115mv is what throwing DRA-45 off.