> I'm pretty sure all of the CAT controllers have one > pot to adjust the input level to the DTMF decoder. I'd > have to check each of the manuals to be 100% sure.
If the controller has multiple receiver inputs... is there only one pot for all the receiver inputs? > It doesn't need to be "cranked way down", but it does > need to be adjusted properly and by using a radio that > transmits DTMF at the right deviation level. RTFM; > it's in there. Well... depends on what planet your repeater is on. To deal with the world I tend to adjust the amateur repeater controller decoders for min required decode level versus the industry described standards. I haven't met an out of the box ham radio that didn't have extra hot audio and way too much deviation. > Amateur radio runs 3-5 kHz on voice and 3-5 kHz on > DTMF, so the decoder has a lot more work to do when > trying not to decode a valid digit with voice input. Nahhhh... Probably 85% plus of the Amateur Radios run way too much hot audio and Deviation because "it sounds good". The best hope of most repeater owners is to target their repeater Tx Deviation to make everyone sound equal on the output and the receiver with controller to best deal with the wide range of good and bad input signals levels. Most of the various decoder problems are excessive input levels so the smart money is to park the decoder level pot at the min owner established input level for a valid decode. Most often that is a crank in the down/reduce input level... You'll find most of the users are blowing audio in well above the min decode value... Unless you want to use an audio agc circuit the min set method is probably the most practical way to go. cheers, s.
