On Nov 4, 2007, at 9:35 AM, James H Vernetti wrote: > everyone says that the repeater audio is excellent. >
Not trying to sound too obnoxious here, and this is just a general comment, not necessarily meant to reflect this particular controller or setup but... *I've heard hams say that a LOT of things that are done wrong at the audio level "sound great".* There's a difference between subjective comments and objective measurements. The only way to know for sure that your repeater is right is to sweep it. Or rely on the engineering that someone else did who did sweep theirs when they set it up the same way. For a quick-and-dirty sweep, a series of tones from the low end to the high end (as many as you like) and seeing if the repeater repeats them at relatively the same deviation level, is usually "good enough" for this test. A good system won't "tilt" that audio toward either end of the 300-3000 Hz AF spectrum. The other way to tell that's even easier: Listen to stations on the input and output of the repeater alternately with the reverse button on a radio with a good high-quality speaker and plenty of audio in a quiet listening environment. If you can't tell the difference between the input and repeated signal (assuming of course that the stations you've chosen to monitor in this way aren't over-deviated, etc) then the repeater is "done right". If you hear any colorization of the audio (more bass, "tinny", compressed, or a different deviation level, which manifests itself as a change in audio level at your speaker if all you are doing is hitting the reverse button)... it's not done right. Pretty easy to test, harder to get "right" in practice. To get it "right", there are a couple of camps/religions. Either one can effectively do the job, if enough attention is paid to detail. -- Nate Duehr, WY0X [EMAIL PROTECTED]
