http://elecraft.85.s1.nabble.com/PSK31-on-my-K3-tp4748845p4752635.html
> 1. Re PTT: If you are using the same (virtual) port for PTT
Not true. microHAM interfaces provide the PTT signal on the
mic cable or the rear panel PTT connection. They DO NOT pass
the DTR/RTS lines through to the K2 or K3.
... Joe, W4TV
> -----Original Message-----
> From:
[hidden email]
> [mailto:
[hidden email]] On Behalf Of Richard Ferch
> Sent: Wednesday, March 17, 2010 9:32 AM
> To:
[hidden email]
> Subject: Re: [Elecraft] PSK31 on my K3
>
>
> Garry,
>
> 1. Re PTT: If you are using the same (virtual) port for PTT
> as for radio
> control, then there are two issues you need to be aware of:
> (i) the K3's
> CONFIG:PTT-KEY must be set to RTS-OFF, not OFF-OFF - if it is set to
> OFF-OFF, PTT will not work via this pathway; and (ii) some
> digital-mode
> software may not support this configuration. Using a separate virtual
> port to control the PTT signal on the K3's ACC port should
> work without
> the need for any configuration setup in the K3, but of course your
> software will have to be set up to use the correct port.
>
> 2. If you have a configuration that works in USB, the identical
> configuration should work in DATA A. The only catch I can think of at
> the moment is that you should check the audio switching in
> the Router to
> make sure it is appropriate in both cases.
>
> 3. For AFSK RTTY with MMTTY, you should really use AFSK A
> mode, not DATA
> A. If you use DATA A, you will have to set MMTTY to REV and the
> frequency readout on the radio's dial will be incorrect. If
> you select
> Sound + Com-TxD(FSK) in MMTTY, you can switch seamlessly back
> and forth
> between AFSK A and FSK D without retuning or changing any
> settings other
> than the mode on the radio. I use such a setup, and the only
> difference
> I can see between AFSK A and FSK D is that my transmitted
> signal appears
> to be slightly cleaner in AFSK A.
>
> 73,
> Rich VE3KI
>
> NI6T wrote:
>
> > I have spent considerable time trying to nail down PSK31 operation
> > with
> > my K3. I have made some Q's, but questions remain.
> >
> > My setup is a K3, MicroKeyer (Router 7.2.4) and DX4WIN
> 7.03. I use the
> > AF4TY PSK app. included in DX4WIN. I have pestered Ira, K2RD who
> > recently co-rewrote the setup guide for MicroKeyer, and he has been
> > graciously helpful with my many MK issues in the past. What
> I would like
> > is to reconcile what is in the K3 Owners Manual (rev. D5)
> with what is
> > in the MicroKeyer (MK) setup guide, and to fully understand
> and access
> > my data mode options.
> >
> > Page 31of the K3 Owners Manual, under /Data Mode Selection,
> /suggests
> > that soundcard-based data communications can utilize either
> LSB/USB or
> > DATA mode--in this case DATA A. (PSK D does not appear to
> be relevant to
> > this discussion.) Tonight, with K2RD's help, I achieved
> transmitted PSK
> > using USB mode. The MK Router setup guide appeared to be
> incorrect for
> > this approach, as follows. Step 3 instructed to assign the /same
> > /(virtual) port for PTT as for the Radio, but Ira
> instructed instead to
> > assign a /separate /virtual port, which was necessary to place the
> > Router in Voice mode during transmit to allow keying the K3. This
> > appears to be OK, but it will require some on-air operation
> to verify. A
> > minor annoyance is the necessity to zero out Compression, which is
> > performed automatically in DATA A mode.
> >
> > Several days earlier, I had managed to achieve PSK output using TX
> > DATA
> > mode with DATA A mode--but I have been unable to duplicate
> that success!
> > I believe I succeeded at that time by following the
> instruction in Step
> > 3 of the MK Router setup guide to assign the /same /virtual
> port for
> > both PTT and the Radio, but now the MK remains in Digital
> mode and there
> > is no output when TX mode is initiated.
> >
> > I would like to use DATA A mode so as not to have to
> remember to zero
> > the Compression and would also like the option to use AFSK
> RTTY, which
> > would also require DATA A. (For RTTY, I have avoided this
> issue by using
> > FSK with MMTTY, and I have so far had no interest in text decoding.)
> >
> > I regret that I find the Data Modes discussion in the K3
> manual to be
> > thin and incomplete, and therefore confusing.
> >
> > I am sure this audience can fill in the holes.
> >
> > Garry, NI6T
>
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