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RE: [tracker2] XMODEM firmware upload/tuning/decoding

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  • Mark Miller
    ... I see. Nothing has changed in world of AX.25. I typically set my deviation with the high tone, or with both tones alternating. I have always had good
    Message 1 of 5 , Aug 29 1:19 AM
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      >The big problem, as I see it, is that people tend to crank up the audio
      >level too high on transmit. But the limiter is AFTER the pre-emphasis
      >circuit, so the high tone gets clipped more and after passing through
      >de-emphasis it winds up lower than the low tone. This negative twist REALLY
      >kills the 2211, and that's why the passive filter network is there on the
      >T2. It's supposed to lower the low tone to keep it in line with the high
      >tone. A little bit of extra twist in that direction isn't as harmful for
      >normal signals.


      I see. Nothing has changed in world of AX.25. I typically set my
      deviation with the high tone, or with both tones alternating. I have
      always had good luck with 3.3KHz peak.

      73,

      Mark N5RFX
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