Posted by
Richard Ferch on
Mar 17, 2010; 1:31pm
URL: http://elecraft.85.s1.nabble.com/PSK31-on-my-K3-tp4748845p4750259.html
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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