Repeater Firmware Updated
In the (seemingly) never ending pursuit of a bug free repeater, I installed the RC210 version 4.30 firmware today. Thankfully, this version loaded and it should take care of the odd audio irregularities we've been having.
4.30 appears to have stable audio levels. I also hope it no longer has the problem where a station on 52.42 will occasionally find that his whole transmission was passed out of the repeater without any audio (just the ptt/cos). Time will tell. At the moment, everything I tested appears to function and I'm crossing my fingers.
Sadly, due to a hardware bug that's somewhere inside the board or Mega128 microprocessor chip, this will be the last firmware update for the forseeable future. The updates produced by Arcom past the 4.30 version appear to cause the 52.92 transmitter to come on and continuously broadcast the weather channel. Oh well.... so it goes.
The code to set the DTMF muting to mute starting at the SECOND (and subsequent) tones was turned on. I verified that it did mute on the second tone while I was standing in front of the rack at the site, but while testing again along the way home it appears as if it's muting (as it had in the past) on the first DTMF tone. Why this is happening will be investigated on the next trip to the site. The theory is that perhaps the 'no-audio-transmission' failure may be related to DTMF muting. While version 4.30 may have a fix for the 'no-audio-transmission' problem, it may also not have such a fix. The theories bantered about when the 4.30 version was originally created wat that the no-audio problem must have been related to DTMF muting in some way, and muting on the second code entered would likely eliminate a false triggering of the mute algorithm (and hence, eliminate the no-audio-transmission problem).