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Re: Funny tones

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  • j0hnburt0n
    I believe those tones are correct, at least for 1200 baud. That s wierd, I wonder why it sounds funny.
    Message 1 of 9 , Apr 11, 2011
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      I believe those tones are correct, at least for 1200 baud. That's wierd, I wonder why it sounds funny.

      --- In tracker2@yahoogroups.com, "j0hnburt0n" <j0hnburt0n@...> wrote:
      >
      > Measured tones with freq. counter... 1200 baud, high= 2.2kHz, low= 1.2kHz. 300 baud, high= 2.3kHz, low= 2.1kHz.
      >
      > Nice, pretty sine wave on both, no clipping. Have tried output levels ranging from min to max.
      >
      > I'm going to rip into one of my other tnc's to measure the freqs to compare.
      >
      > JB
      >
      > --- In tracker2@yahoogroups.com, James Ewen <ve6srv@> wrote:
      > >
      > > On Mon, Apr 11, 2011 at 10:45 AM, j0hnburt0n <j0hnburt0n@> wrote:
      > >
      > > > By "good audio level" I mean that I've adjusted the audio output from
      > > > the Tracker2 as received by a second packet station, to be roughly
      > > > equal to other stations that I hear on the band in terms of volume.
      > >
      > > So that means they might be good, or they might be bad depending upon
      > > what the reference tones are set up like... 8)
      > >
      > > Try dropping your level and having a listen to see if the tones clean
      > > up... drop the level all the way until you can't hear them anymore,
      > > just to ensure that you drop them enough to get out of clipping if
      > > that is indeed the problem.
      > >
      > > Also remember that the tones are being produced by a DAC, these are
      > > not pure sinewaves, so they will sound a little different than pure
      > > sine waves.
      > >
      > > James
      > > VE6SRV
      > >
      >
    • Jason KG4WSV
      ... Is it a bit off frequency, RF-wise? Or maybe all he can hear are TTs, which make the in-spec OT sound odd? :) -Jason kg4wsv
      Message 2 of 9 , Apr 11, 2011
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        On Mon, Apr 11, 2011 at 8:24 PM, j0hnburt0n <j0hnburt0n@...> wrote:
        > I wonder why it sounds funny.

        Is it a bit off frequency, RF-wise?

        Or maybe all he can hear are TTs, which make the in-spec OT sound odd? :)

        -Jason
        kg4wsv
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