On 3/10/2014 1856, Caleb Pal wrote:
Hello all,
We received our RTCM's this week, and I am working to interface them to the Quantar. I've run into a few issues:
1.) AUX TX Audio. I've had success with one machine in getting the audio out of Pin 5 of the Telco connector, but not on the other. Is creating a wildcard table to enable "AUXTX-TX ON" when there is an input on Pin 9 (PTT) the correct method to enable TX audio output on Pin 5?
1.) BEW Mode. My RTCM's show it as unavailable as an option to enable. Is there a trick to enabling it?
2.) I cannot seem to get the squelch calibrated. I get a slow flashing light a little while after I enable squelch cal, which seems to indicate low discriminator noise. I tried enabling jumper JP1 with no change. Does BEW mode need to be enabled to get a proper squelch calibration with the Quantar? Tim suggested that some older firmware version may not provide enough discriminator noise. I want to be sure I've exhausted all options before I hunt for SCM with newer firmware for these machines.
Thanks,
Caleb
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To update my progress: I downloaded the BEW firmware for the RTCM and loaded it on both of our RTCM's. I enabled BEW mode, and attempted to calibrate the squelch again. Still get the slow flashing RX light, but 60-90 seconds into the squelch calibration procedure it finally completed with a squelch cal value of 100-110. The squelch POT lights up the RX light when the POT is turned down to a value of about 150 (post sq cal procedure). Tim mentioned that older Quantar firmware may have low discriminator levels. The above squelch cal was done with a 800MHz Quantar, no antenna attached, with the latest firmware I've been able to find, 20.14.048. Is what I'm seeing normal/acceptable for a Quantar? Also, something I noticed once the BEW firmware was loaded, I no longer have the ability to access the Diagnostics menu on the RTCM. So, I am unable to transmit a 1khz tone, etc. I used the latest BEW SMT FW version (1499) off of the Allstar SVN server. Thanks, Caleb