[RTTY] Slow xmit with MMTTY

[Don AA5AU]

I kind of doubt the problem exists with the radio. I've seen instances with PTT delay caused by having both software and hardware PTT enabled within MMTTY. You say PTT is "Operating PTT via DTR/RTS", what exactly do you mean? Do you mean via radio control or via a hardwire cable from a COM port using some sort of interface to key PTT via RTS on the serial port? If you are using both, try disabling radio control or disconnect the hardwire.

I'm not familiar the K3 so I might be missing something.

73, Don AA5AU



>________________________________
> From: Arliss <w7xu at iw.net>
>To: rtty at contesting.com 
>Sent: Sunday, October 14, 2012 10:12 PM
>Subject: [RTTY] Slow xmit with MMTTY
> 
>I'm having a problem getting my K3/MMTTY AFSK system to work properly and am wondering if anyone can help me out.
>
>The problem I am experiencing is that when I attempt to transmit (clicking on TX on the MMTTY screen), the K3 switches essentially immediately to transmit, but it takes almost 4 seconds before the K3 actually sends a signal.  Then when I click on TXOFF, the signal stops immediately, but it's about 2 seconds before the radio switches to receive.  The delays are far too long to do any semi-serious operating.
>
>The radio: K3/100, connected to the computer via line in/line out
>           Data: AFSK A
>           Operating PTT via DTR/RTS
>           TX DLY is at minimum; PTT RLS is at minimum
>
>The computer:  Pentium 4 CPU, 2.60 GHz, 2.98 GB RAM
>               Windows XP, Service Pack 3
>               The sound card does not share an IRQ with any
>               other device
>               Sound board is SoundMAX
>               No other programs running simultaneously
>               CPU monitor indicates it's running at less than
>               10%
>
>MMTTY:  Version 1.68A
>        Priority "Highest"
>        Char. wait & Diddle wait set to far lest
>        Flow control XON/XOFF is set off
>
>I assume it's something basic, but I haven't been able to discover the answer.
>
>Actual transmission and reception are fine, once the changeover takes place.
>
>Makes me long for the days when I had 28ASRs.
>
>Thanks in advance & 73,
>
>Arliss
>
>
>
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