[RTTY] FSK & 1000MP & MTTY Problem

[DJ3IW Goetz]

No, no, the FT1000MP has absolutely no problems handling either
high or low tones in USB or LSB or FSK or AFSK. It's all a matter
of the right menu settings. NB1B should give LSB "reverse" a try.

73 de Goetz
dj3iw at t-online.de
----- Original Message -----
From: <psussmman at pactor.com>
To: "NB1B" <nb1b at comcast.net>
Cc: <rtty at contesting.com>
Sent: Tuesday, September 14, 2004 10:37 AM
Subject: Re: [RTTY] FSK & 1000MP & MTTY Problem


> I am not familiar with the 1000MP, but if you are using a computer to
> generate the tones and feeding them into the MIC (or external input)
> jack you are probably operating AFSK and not FSK.
>
> FSK is usually internally generated by the rig and involves changing
> the rig frequency back and forth using a fixed shift. AFSK uses two
> audio tones which are toggled through SSB which accomplishes the same
> thing. In the case of AFSK on SSB, the modulating frequency determines
> the center carrier frequency. Thus it is typical to use a LOWER audio
> frequency pair when operating AFSK on LSB.. usually 1200Hz and 1400Hz.
> Operating AFSK with standard USB AUDIO tones of 2195Hz and 2395Hz will
> probably be "out of range" on the receive detection frequency of your
> input filters on LSB. Thus, no RX print. Of course, when switching
> between USB and LSB, MARK has to be reversed.
>
> This is covered quite throughly in a back issue of PACTOR NEWS.
>
> Need more? Let me know... good luck.
>
> Phil Sussman - N8PS
> Editor - PACTOR NEWS
>
> -----------------------------
>
> Quoting NB1B <NB1B at comcast.net>:
>
> > I've been trying to key my 1000MP using MTTY and FSK.  I can get it to
work
> > using USB and Rev, but I can't get it to work using LSB and nor.  Any
> > suggestions that I could try?
> >
> > LSB and USB phone both work FB.  I just built the FSK Interface, and the
> > signal sound fine on a second rcvr, but all I get when trying LSB and NOR
> > are "can't print" replies.
> >
> > Its got me stumped.  Just made another RTTY QSO, called several times
using
> > LSB and NOR, no reply, then switched to USB and REV and the station came
> > back in one call.  I think I'm missing something.
> >
> > Dennis NB1B
>
>
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