[RTTY] NAQP RTTY on NCDXF Beacon]

[Wolf (DL6JZ)]

Hi Robert,

thank you for your interest in this problem.

There are radios on the market wich have a menue item that corrects the
special offset of  the rtty mark tone.  In my case it is the FT-1000MP
and I know that there are many other radios with the same feature. I had
a Kenwood TS-570 some time ago and I am quite sure that there I had this
feature too. But you have to go into the menue and select it. The
default setting is as you described.

If you are running FSK this frequency problem doesn't depend on how you
generate the RTTY signal, by a hardware TNC or by software. It depends
only on your radio!

73 + 55
Wolf, DL6JZ


-----Original Message-----
Date: Wed, 11 Jan 2006 00:02:03 +0100
Subject: Re: [RTTY] NAQP RTTY on NCDXF Beacon]
From: "robert" 
To: , "Wolf \(DL6JZ\)" 

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)" 
To: 
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
>