From: Hamish Moffatt (wbjouiln.jdiddm@limes.kompakt.pl)
Date: Fri Aug 10 2001 - 16:34:00 EEST
On Fri, Aug 10, 2001 at 08:52:15AM -0400, Jason Stewart wrote:
> 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
Sounds like you want to adjust TX Delay. It's a standard parameter on
all packet modems (TNCs, soundmodem, etc). It's the amount of time
between key up and the transmission of actual data. Between key up
and start of data, the modem transmits a preamble.
> 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.
Could be RF feedback. If your antenna is a Yagi fed with coax, do you
have a balun at the feed point (eg rolled up coax)?
Hamish
-- Hamish Moffatt VK3SB <eecz.idvzxyqwp@jfax.com> <terhi.victor@logonet.com> - To unsubscribe from this list: send the line "unsubscribe linux-hams" in the body of a message to aoja@ktis.net More majordomo info at http://vger.kernel.org/majordomo-info.html
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