Trouble with RTTY
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I've been fooling
around with RTTY for a few days on my K3. It was working fine yesterday.
I even made a contact and was told I was loud and clear, but today I'm
having a problem on receive. The K3 is in DATA mode and set to FSK
D. It was in this mode yesterday. I have the DUAL PB turned
on. I'm able to tune in an S9+ RTTY signal easily and have it decode on
the K3 screen solidly. I have MMTTY (latest version) running on my
computer. When the K3 is in DATA mode (whether DUAL PB is on or off)
the audio from the radio to the computer is virtually nonexistent. The
audio from the K3 speaker is loud and clear. This is while the K3 is
decoding the RTTY perfectly on it's screen. I have CWT turned on and the
LCD segments are centered. FC says * 1.35 and is not movable. If I switch
the K3 to LSB, the audio to the computer is is now loud and decodes perfectly in
the MMTTY screen. LIN OUT is set to 15 and seems to be more than enough
for MMTTY. I touch nothing else but the MODE. This didn't happen
yesterday. Yesterday while in FSK D DATA mode, the audio to the computer
remained loud and clear. It's almost as if today the K3 isn't putting out
audio when it is in FSK D MODE or that the filter is somehow
shifted.
Roger,
W1EM
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Roger, What is the Mark frequency in MMTTY vs. the Mark Frequency in the K3? > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of Roger Marrotte > Sent: Tuesday, October 14, 2008 12:07 PM > To: [hidden email] > Subject: [Elecraft] [K3] Trouble with RTTY > > > I've been fooling around with RTTY for a few days on my K3. > It was working fine yesterday. I even made a contact and was > told I was loud and clear, but today I'm having a problem on > receive. The K3 is in DATA mode and set to FSK D. It was in > this mode yesterday. I have the DUAL PB turned on. I'm able > to tune in an S9+ RTTY signal easily and have it decode on > the K3 screen solidly. I have MMTTY (latest version) running > on my computer. When the K3 is in DATA mode (whether DUAL PB > is on or off) the audio from the radio to the computer is > virtually nonexistent. The audio from the K3 speaker is loud > and clear. This is while the K3 is decoding the RTTY > perfectly on it's screen. I have CWT turned on and the LCD > segments are centered. FC says * 1.35 and is not movable. If > I switch the K3 to LSB, the audio to the computer is is now > loud and decodes perfectly in the MMTTY screen. LIN OUT is > set to 15 and seems to be more than enough for MMTTY. I > touch nothing else but the MODE. This didn't happen > yesterday. Yesterday while in FSK D DATA mode, the audio to > the computer remained loud and clear. It's almost as if > today the K3 isn't putting out audio when it is in FSK D MODE > or that the filter is somehow shifted. > > Roger, W1EM > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Roger Marrotte-2
Make sure the K3 PITCH value matches the MMTTY MARK
value. The rest of your settings below seem OK. Sometimes, a
discrepancy will show up as the two tones offset from the two yellow lines in
the MMTTY FFT display.
73,
Ed - W0YK
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In reply to this post by Roger Marrotte-2
Chen,
That's it! The radio has come back to life. I don't remember ever hearing about using PITCH and being able to change the frequency for the RTTY tones so I'm pretty sure the K3 side of things wasn't changed. The one thing I forgot to mention, of course, was that I was having trouble trying to set up MMTTY with Writelog so I reinstalled MMTTY this morning in C:\MMTTY vs. the default \Program Files\MMTTY location. It was a Vista problem, I think. That fixed the problem I was having but I guess the tone pair frequency was changed in MMTTY. I learned something and now I'm happy. So, for others out there thinking about using RTTY on a K3 with MMTTY, Vista might bite you if you install in the \Program Files directory, and you can change the RTTY tone frequencies on your K3 by holding in the SPOT button (PITCH) and turning the main VFO knob to match the frequencies set up in MMTTY. Thanks, Roger, W1EM -----Original Message----- From: Kok Chen [mailto:[hidden email]] Sent: Tuesday, October 14, 2008 1:01 PM To: Roger Marrotte Subject: Re: [Elecraft] [K3] Trouble with RTTY Roger, You might check the tone pair that you are using. The K3 and the software must use the same tone pair. If your software is using the 2125 Hz/2295 Hz tone pair, you need to use the PITCH (hold SPOT button) while in the FSK-D mode (or AFSK A mode) and set MARK-SH with the main VFO knob to "2125 - 170" Vy 73 Chen, W7AY _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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