N1MM RTTY & K3

[terry burbidge]

Perhaps someone can please help. I previously set up N1MM to work RTTY via
N1MM digital interface using LSB mode on my K3 - no problems there. The K3
User Manual suggests using 'Data - AFSK A' mode for soundcard based RTTY
which I have tried to do. In AFSK A mode on the K3, I can only key the radio
via MVARI and not via the N1MM main window (F1-F12 macros). However, if I
set the K3 to 'PSK - D' mode, it does work from the main window.

 

 

Cheers,

 

Terry Burbidge

G4MKP

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[Mike Reublin]

Terry,
I just went through something similar. Make sure the MARK frequency in
MMTTY (which N1MM uses) matches the mark frequency in the K3. In data
mode, hold the PITCH button and you see mark and shift.

ALso make sure that MMTTY is set to use the soundcard (Options, Misc).

GL & 73,
Mike NF4L

terry burbidge wrote:

> Perhaps someone can please help. I previously set up N1MM to work RTTY via
> N1MM digital interface using LSB mode on my K3 - no problems there. The K3
> User Manual suggests using 'Data - AFSK A' mode for soundcard based RTTY
> which I have tried to do. In AFSK A mode on the K3, I can only key the radio
> via MVARI and not via the N1MM main window (F1-F12 macros). However, if I
> set the K3 to 'PSK - D' mode, it does work from the main window.
>
>  
>
>  
>
> Cheers,
>
>  
>
> Terry Burbidge
>
> G4MKP
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>  

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[Richard Ferch]

G4MKP wrote:

> Perhaps someone can please help. I previously set up N1MM to work RTTY via
> N1MM digital interface using LSB mode on my K3 - no problems there. The K3
> User Manual suggests using 'Data - AFSK A' mode for soundcard based RTTY
> which I have tried to do. In AFSK A mode on the K3, I can only key the radio
> via MVARI and not via the N1MM main window (F1-F12 macros). However, if I
> set the K3 to 'PSK - D' mode, it does work from the main window.
>

I suspect this is more of an N1MM Logger question than a K3 question.
Here are some first stabs at it, but for follow up you should perhaps be
asking this question on the N1MMLogger-Digital group at Yahoo.

In your last sentence, I presume you meant FSK D and not PSK D. N1MM
Logger does not support PSK D. In PSK D, all you will get when you
transmit from the Logger is an unmodulated carrier. Also, MMVARI does
not support FSK, so if you are using the MMVARI engine with the K3 in
FSK D, again all you will get is an unmodulated carrier on transmit. To
use FSK D from N1MM Logger, you need to use the MMTTY engine and supply
an on-off keying signal to the K3's FSK input. From your description,
you are using the sound card to provide the modulation, and AFSK A is
the mode you really want to use.

For AFSK RTTY using either MMTTY or MMVARI, you need to ensure that in
N1MM's Configurer under the Mode Control tab you have mapped RTTY to
AFSK for both DI windows. If you map it to RTTY, the K3 will be in FSK
D, which won't work for you. Check this by looking at the mode in the
title bar of the entry window and in the band amp; it must read AFSK.

When you say you can only key the radio via MMVARI, what do you mean by
"key"? Do you mean switch the radio to transmit, or do you mean get
non-zero output?

If it's the former, there is a problem with PTT. If you are using PTT
via radio command or via RTS on the radio control serial line, you do
not need to check any of the "Digital" boxes in the configurer, but if
you are using a separate serial port, you need to check the "Digital"
box for that port, click on the "Set" button and set the "Dig Wnd Nr" to 1.

If it's the latter, I suspect that the problem may be a mode mismatch -
see above.

I'm off to another location now for a contest, but I'm sure there are
other people who can help you either here or on the N1MMLogger-Digital
group.

73,
Rich VE3KI
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