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588RE: [tracker2] Firmware update

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  • scott@opentrac.org
    Jun 3, 2006
    • 0 Attachment
      There are, but the other one is used for clock recovery on the receive side.
      If I wanted to use an extra I/O pin, I guess I could switch it between hi-Z
      and low to sink the audio signal to ground through a resistor. That'd give
      two distinct audio ranges.

      Scott

      > -----Original Message-----
      > From: tracker2@yahoogroups.com
      > [mailto:tracker2@yahoogroups.com] On Behalf Of
      > juha.nurmela@...
      > Sent: Saturday, June 03, 2006 3:45 AM
      > To: tracker2@yahoogroups.com
      > Subject: Re: [tracker2] Firmware update
      >
      >
      >
      > On Fri, 2 Jun 2006 scott@... wrote:
      >
      > > TXLEVEL command is now implemented, and will scale the
      > audio level over
      > > a fairly wide range. I wouldn't take it below about 32 though, or
      > > quantization noise might start being a problem.
      >
      > Are there two hardware PWMs on that chip ? Wondering if there
      > is a neat
      > way to "choke" the PWMA by dc from PWMB. Increasing component count,
      > tempco problems, ... Just a thought.
      >
      >
      > Juha, OH5NXO
      >
      >
      >
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