On Wed, 12 Jun 2002 15:36:22 +0100, Jim Martin wrote:
>FSK on Com1 and rig control of MK5 on USB using a USB to serial converter.
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You might try PTT on a com port direct without the USB converter. It
could be Windows is taking it's time polling the converter.
Before you go to the trouble of building a PTT keying circuit, and if
you have a scope, look at the PTT pins RTS and DTR to see if they behave
normally. Unkeyed, they should measure about -12vdc and keyed about
+12vdc. See if the transition corresponds to what it should be doing.
More info is available in the MMTTY help file under "PTT Control of T/R
>From a Serial (Com) Port".
Bill, W7TI
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