The URI and modified fobs need to see a hardware signal that goes to ground on an active hi or low state. If one is using hardware cor from a radio, then it needs to pull to ground if active low or active hi. It does not need to have a voltage output. It just needs to pull to ground. If your radio is sourcing a voltage but doesn't pull to ground then the URI or fob may not see a signal change and think the cor is open. App_ Rpt may think the receiver is open depending on your settings in usbradio.conf in the "COR from" line. This is because any sourced voltage from the radio is blocked by the diode going to one of the input lines. The CM108 chip has internal pullup resistors on its cor input lines so it doesnt need external voltage, hence the diode in line. In all may systems I modify the radios to have open collector that pulls to ground on a signal. All my systems are "active low" this way. If you have a radio that doesn't pull to ground then you can use the cor signal to drive an NPN transistor. connect the collector to the fob/ URI and invert your setting in usbradio.conf. One other thing, On simplex nodes I have seen some radios where the cor goes active on transmit when connected through the Packet interface to fobs/URIs. In this case you might want to use DSP squelch instead of external hardware for cor. Just some thoughts. Jon VA3RQ On 11/5/2010 8:23 AM, Neil Addis (WA5JXY) wrote:
Did it ever work correctly? Have you checked the COR line or COR settings?
Neil _______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users