[RTTY] N1MM and MMTTY setup

[Alex Malyava]

I think this is the place to pay attention to:

... everything seems to tune OK.  I can tune on a signal, see the signal
level, waterfall and XY tuning indicator appear
to work, but I don't get a really clean XY pattern.  The signal level seems
to be fine, well above the squelch setting in MMTTY and sometimes full
scale....

Tad,
You suppose to see twin-peaked RTTY signal on MMTTY screen.
Those peaks must be aligned with two white lines - more or less precisely,
but AFC will help you a little bit here.
Then you should see XY pattern pretty clearly. If it not the case - you need
to check the path how audio signal from your radio gets to the computer.
Is it connected to Line-In or Mic? What is the signal level? Do you have, by
any chance, "digital or mic boost " turned on? try to turn it off. Any
chance you get 60Hz buzz in that line? Listen to it with your headphones.

I dont know what else.

2008/1/3, Tad Danley <tdanley at verizon.net>:
>
> Tad Danley wrote:
> >
> > Any suggestions on things to check out?  Thanks in advance!
> >
>
> I got several offers to help with requests for more info - thank you!  I
> am able to TX RTTY OK and diddle, but in RX 99% of what I print is
> garbage.  I am tuning _very_ slowly and am able to get the internal RTTY
> decoder in my ProII to print just fine.  I have tried selecting the
> Reverse button in MMTTY but it doesn't make any difference.  Here are
> some more details.
>
> I'm using N1MM v 7.12.4.  The microKEYER is running USB router 5.1.1.  I
> have used N1MM with the microKEYER for just over a year, and everything
> works great for CW and SSB.  The rig and N1MM talk to each other fine
> and I am able to send CW from N1MM using WinKey built in to the
> microKEYER, and send wav files from the sound card is SSB.
>
> Here are some of my RTTY settings:
>
> ProII:
> set to 9600 baud
> RTTY mode
> AGC Fast
> RTTY filter ON
> As I mentioned before, the RTTY decoder in the ProII works fine - I was
> able to print the W1AW RTTY bulletin last night on the ProII scope.
>
> USB router:
> set to 9600 baud
> Radio on Com 6
> FSK on Com 7 with PTT box checked
> Winkey on Com 8
> Ausdio switching for FSK/digital set to BBB
> PTT for FSK/digital set to PTT2 (rear panel jack)
>
> N1MM:
> set to 9600 baud
> Radio on Com 6
> Com 7 has Digital and CW/Other buttons selected with DTR = always off
> and RTS = PTT
> Digital Interface 1 TU type = sound card
> Digital Interface 1 MMTTY has FSK selected
> As I mentioned before, everything seems to tune OK.  I can tune on a
> signal, see the signal level, waterfall and XY tuning indicator appear
> to work, but I don't get a really clean XY pattern.  The signal level
> seems to be fine, well above the squelch setting in MMTTY and sometimes
> full scale.
>
> MMTTY:
> Demodulator: Discriminator set to IIR resonator, Mark = 2125 Hz, Shift =
> 170 Hz, BPF and AFC Connection both selected
> AFC: AFC selected and Shift = Fixed
> Decode: baud rate = 45.45, bit rate = 5, stop length = 1 bit for RX, 1.5
> for TX, parity = none, default RX stop bit = 1 bit for RX, 1.5 for TX,
> BAUDOT codeset = S-Bell
> Misc: Soundcard FIFO RX = 12 and TX = 4, Priority = Higher, Device = 1,
> Source = Mono, sound loopback = Int.
>
> Thanks again for the help!
>
> 73,
>
> --
> Tad Danley, K3TD
> EM10dq
>
>
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