[WriteLog] WL/MK2 TX hang-up using MTTY

[Joe Subich, W4TV]

Make sure Writelog is *not* using "COM PTT"  (PTT commands on the serial
port) as several rigs appear to have a subtle race condition between PTT
via CAT commands and hardware PTT.

My suspicion is that the rigs in question mask changes on the PTT input
while processing CAT PTT commands but ignore a CAT PTT off if the PTT
input is asserted ... then when unmasking the PTT input the transition
has been missed.  I've never seen the issue (or heard reports of it)
in systems where COM PTT (or equivalent software PTT) has been disabled.

73,

   ... Joe, W4TV


On 2014-12-07 9:28 PM, Ed Muns wrote:
> I have the same problem, but only when the K3 is FSK-keyed from a Rttyrite
> window tied to the sub-receiver.  It is intermittent, failing to release PTT
> about half the time, and behaves as though the %E is ignored in the message.
> Hitting ESC will release PTT, but it is a pain to constantly be hitting ESC
> throughout the contest.
>
> I've never had this problem with a Rttyrite window tied to the main
> receiver, but I can't figure out what the difference is.  In your case, I
> guess it is the single Rttyrite window linked to the main receiver.
>
> I do not use a microKeyer, just simple homebrew FSK/PTT Com port cables.
>
> I suspect that whatever the cause, it may be common to both our cases.  It
> "seems" to be in WriteLog, but not sure.
>
> Ed W0YK
>
> -----------------------------------------------------------------
>
> Eric W3DQ wrote:
>
> My station is a Microkeyer 2 and an Orion 565.
>
> My plan was to use MTTY as my RTTY engine w/WL for today's 10m RTTY
> contest.
>
> I was able to receive well, but on TX it wouldn't stop (unkey) after the
> message was sent.
>
> Not sure what went wrong, as it worked with the same settings with N1MM.
>
> I would guess that it's something to do with the PTT and/or keying line,
> but beyond that, I haven't a clue.
>
> Any thoughts?
>
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