CDM1250 as a station alerting base
Posted: Thu Feb 17, 2022 6:35 am
I donno what I might be doing wrong here........
I have 3 radios here....CDM1250's......all programmed the same.....trying to get an external alarm output across pins 4 & 7. Pin 4 programmed to go low.
Programmed for select call.....no switch. Programmed for call alert......no switch. constant 12 vdc on pin 4 to ground with power applied to the radio, even if powered off.
One of these radios is new old inventory. Can't have 3 bad radios.......or maybe I do....?
I have 3 radios here....CDM1250's......all programmed the same.....trying to get an external alarm output across pins 4 & 7. Pin 4 programmed to go low.
Programmed for select call.....no switch. Programmed for call alert......no switch. constant 12 vdc on pin 4 to ground with power applied to the radio, even if powered off.
One of these radios is new old inventory. Can't have 3 bad radios.......or maybe I do....?