[RTTY] NAQP RTTY on NCDXF Beacon]

[Joe Subich, W4TV]

Robert,

The standard way of reporting the frequency of a FSK signal is
to report the RF frequency of the MARK (higher) tone.  Yaesu,
among other radios, will automatically offset the display frequency
by the mark tone when in RTTY mode.  Reporting the "carrier" frequency
of AFSK operation is just plain wrong ... particularly when the tones
can be high/low/non-standard and the sideband can be either upper or
lower.

Similarly, PSK operation should be reported as the RF frequency ...
not the dial (suppressed carrier) frequency and some offset (which
direction)?

73,

    ... Joe, W4TV



> -----Original Message-----
> From: rtty-bounces at contesting.com
> [mailto:rtty-bounces at contesting.com] On Behalf Of robert
> Sent: Tuesday, January 10, 2006 6:02 PM
> To: RTTY at contesting.com; Wolf (DL6JZ)
> Subject: Re: [RTTY] NAQP RTTY on NCDXF Beacon]
>
>
> Hi Wolf.
> thanks for all.
> What kind of a radio di you have?
> I ask because I never have heard about a radio who sends DC to the rf
> stages.
> In the KAM+ Manual and in the arrl handbook, also in the manual for my
> kenwood radio as well in the manual for the dxp38 modem I see
> the same thing about the frequency from the transmitting starion.
>
> Frequency sent = displayed frequencu +- the mark/shift tones.
>  the plus or minus depends if you send USB or LSB.
>
> in my case 14.100 + 2125 = 14.102125 KHZ
> also  14.097875 + 2125 = 14.100 khz
> soundcards use different frequency but it can be calculated.
> I was testing this with my friend tonight and it did work this way.
> Me transmitting on 14.09787 KHZ and he did receve me on 14.100 KHZ
> by doing revers FSK I had to use minus and get the other sideband.
>
> regards robert tf3tty...... 73
> ----- Original Message -----
> From: "Wolf (DL6JZ)" <dl6jz at t-online.de>
> To: <rtty at contesting.com>
> Sent: Tuesday, January 10, 2006 8:23 AM
> Subject: Re: [RTTY] NAQP RTTY on NCDXF Beacon]
>
>
> > Hi Robert,
> >
> > first, you must be a good RTTY-contester because we had a QSO in the
> > Roundup.  :-))
> >
> > Plus/minus 2 kHz is too much for the free space for the NCDXF beacon
> > system. I think plus/minus 500 Hz will do it.
> >
> > I am running FSK. And when my radio shows 14100 kHz then my
> two tones
> > will be at 14100kHz and 14099.830 kHz.
> >
> > Soundcard users who are running AFSK can configure their software to
> > show the real mark frequency. So I think there should be no
> problem with
> > transmitting in a forbidden area.
> >
> > 73 + 55
> > Wolf, DL6JZ
> >
> >
> >
> > -----Original Message-----
> > Date: Mon,  9 Jan 2006 19:41:41 +0100
> > Subject: Re: [RTTY] Fw: RE: NAQP RTTY on NCDXF Beacon]
> > From: "robert"
> > To: ,
> >
> > hi all.
> > Those who use souncards or use FSK keying and set the rig to 14.100,
> > where
> > does the signal go.
> > FSK shift is 2125/2295 for mark/space or 1275/1445 mark/space. When
> > using
> > soundcards this can be almost anywhere, I use 1100/1300
> because it goes
> > into
> > the filters passband on my rig.
> > The 2 KHZ safetyzone is the minium to set for us not to
> interfere with
> > the
> > beacon. It should be 2500 HZ. There are too many hams out there who
> > don't
> > know about this mark/space stuff.
> > But on the other hand I wonder those who send/receve on the beacon
> > frequency, don't they have interference from the beacon??
> >
> > regards & 73 tf3tty robert..
> >
> > p.s. I wonder how I am doing as a rtty contester!
> > am I good or bad?
> >
> > c u all
> >
> >
> >
> > _______________________________________________
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> > RTTY at contesting.com
> > http://lists.contesting.com/mailman/listinfo/rtty
>
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