Well, RVQ1 seems to be a squelch adjustment, and RVM1 seems to be an audio adjustment, not sure about RVQ3, but I also had a problem with the Cobra Ultra-III being off frequency, as when talking to someone else, they stated that I was transmitting on 27.182.0, instead of 27.185 for Channel 19, so it appears to be off frequency, and below frequency, so that was one reason why I didn't sound right on 27.185 MHz.