User-mode Soundmodem TX Problems

From: Jason Stewart (mrp.hgcmanoc@cashcade.co.uk)
Date: Fri Aug 10 2001 - 15:52:15 EEST

  • Next message: Hamish Moffatt: "Re: User-mode Soundmodem TX Problems"

    Greetings fellow hams,

            I am using the User-Mode soundmodem. I have everything set up to go with
    afsk1200, the PTT circuit is built and keying from the serial port. When I
    tested the setup last night, it seemed as if only the last part of the
    packet was being transmitted or the transmitter was not keying up soon
    enough (is there a delay setting that I can use for this?). There is also
    noise in the background (possibly because my PTT is on the same mic pin as
    TX Audio). This morning the radio got stuck in TX while using the call
    program. I am pretty certain that the circuit is OK because I tested it
    quite extensively. Could it be a sound card problem? I am using an old 486
    with 12 megs of ram and an old OPL-SA2 soundcard with linux 2.2.

    Any help will be appreciated

    73's
    Jason Stewart
    KC8NJX

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    This archive was generated by hypermail 2b30 : Fri Aug 10 2001 - 15:53:06 EEST