I've found this page (http://www.febo.com/packet/layer-one/transmit.html) to be VERY helpful at understanding the deviation (loudness) issues as well as providing a step-wise procedure to fix it. They recommend starting low and going UP until you hear no change and then backing DOWN a bit. YMMV
Lynn (D) - KJ4ERJ Fred Hillhouse wrote: > > > 4) I can hear the packets fine with my stand alone HT radio, > with APRS. They should like everyone elses packets. But maybe I do > need to adjust the volume settings (what is that command?) so that > the modulation is improved. Maybe I am undermodulating the packet, > with my audio from the TRACKER? > > > My guess is that under modulating the packet is rarely the problem. In > actually the greatest fault is too much modulation. More means better, > right? No. Many directions say to start at max and work down until the > signal sounds good again. I have never been successful doing that. I > can't hear the difference between an over modulated signal to one that > is good. > > My method of setting the output is to turn the TXLEVEL to 0 and work > up from there. When I hear a signal, I stop and that is usually good. > I have bumped it up a couple of levels but I have not found it to be > detrimental. What is a 'good signal' to me? Glad you asked. I listen > with another radio and when I can hear the audio, I am happy. > > You are better off not being as high as 3.5 kHz, than being over it. > > I did recently get a deviation meter and will have to go in a measure > my current settings. I am curious where they really ended up. > > > Best regards, > > Fred >
