I'm currently working on getting some CM300's installed in our highway department trucks. Up until yesterday, everything went fine. On the newest deuce and a half truck, there was no radio to replace so it's a clean install with a new power cable and antenna.
I double-checked power and ground and made sure the antenna was installed correctly using a meter to verify no shorts. The radio is programmed identically to 9 others. The radio powers up normally and appears to be working fine. However, after one test transmission on the highway channel, transmit stops working. The red TX light comes on but the radio just chirps a couple of times. There is no transmission. All the other channels in the radio continue to transmit properly on multiple radio checks. I can only guess that this chirp is some kind of error message, but I can't find anything about it in any of the maintenance or operator's manuals.
I've swapped out radios 4 times and each radio performs identically in the new truck. As soon as I put any of the radios into another truck or on the bosses' desk, it transmits just fine on the highway channel as well as all others. All of the radios were cloned from the first radio installed which has been in service for 4 months now with no problems so I know the programming is OK.
SWR is OK but not great at 1.3:1 - the boss insisted on a mirror mount for a quarter wave so that's the best we're gonna get there.
Anybody got any insights on this?
Thanks.
I double-checked power and ground and made sure the antenna was installed correctly using a meter to verify no shorts. The radio is programmed identically to 9 others. The radio powers up normally and appears to be working fine. However, after one test transmission on the highway channel, transmit stops working. The red TX light comes on but the radio just chirps a couple of times. There is no transmission. All the other channels in the radio continue to transmit properly on multiple radio checks. I can only guess that this chirp is some kind of error message, but I can't find anything about it in any of the maintenance or operator's manuals.
I've swapped out radios 4 times and each radio performs identically in the new truck. As soon as I put any of the radios into another truck or on the bosses' desk, it transmits just fine on the highway channel as well as all others. All of the radios were cloned from the first radio installed which has been in service for 4 months now with no problems so I know the programming is OK.
SWR is OK but not great at 1.3:1 - the boss insisted on a mirror mount for a quarter wave so that's the best we're gonna get there.
Anybody got any insights on this?
Thanks.