It just doesnt make sense to give someone the incorrect frequency when
spotting a digital station. Nor does it make sense to give them a VFO freq,
since we all know that the station IS NOT THERE. It is the VFO plus the
audio card freq added together. That is where we will find the digital
station, no matter what rig we have, or what our offset freq is. I really
detest seeing someone giving a vfo on the spot, and giving a offset to add
to it, in the notes. Just give me the freq. I dont care what your vfo or
offset is. Mine may or may not (probably not) be the same exact things.
But you can bet that if you give me the vfo plus offset as one figure, that
when I click on it, my CAT program will put me on top of the signal, and I
can read it immediately, without having to look around at a dozen different
signals before I can do so. It is the same with CW signals. I may have 800
cy offset , and you may have 600 or 759, it doesnt matter. If you are using
a waterfall, and I am, the signal will be right where we want to copy it.
If not using a waterfall/computer readout, it will still be in the correct
place in our earphones.
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesy I upload to eQSL but if you
use that - also pls upload to LOTW
or hard card.
moderator [EMAIL PROTECTED]
moderator http://groups.yahoo.com/group/DXandTalk
----- Original Message -----
From: "Jose A. Amador" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, February 23, 2007 2:26 PM
Subject: Re: [digitalradio] 14100.5 kHz USB - ALE Channel Bandwidth,
IARUBeacon Guardband
> KV9U wrote:
>
> > SSB nets are not running digital modes and their frequency is the
> > dial frequency, whether USB or LSB. CW nets are based on the zero
> > beat frequency, but different rigs have different CW offsets. Many
> > rigs have the ability for the operator to change the CW pitch to
> > center the received audio frequency in the filters as well as meet
> > operator preference. The other operator has no idea that you are
> > doing this as long as you are zero beat on the frequency.
> >
> > KV9U
>
> I think everything is relative, and SSB is broad enough to fiil your
> filter with a single signal.
> So there should be no mistakes.
>
> But with data modes, some other reference, preferably related to its
> spectrum on
> the air is to be preferred, as RTTY has long done with the mark frequency.
>
> Taking it to the extreme, on 14070 (dial) USB I can sometimes find up
> to some 20 filling
> my 2.7 kHz wide filter. But it could be fairly easy to unmistakably
> identify a PSK31 signal on
> 14071.225 among the others as a combination of dial frequency and
> waterfall frequency.
> I believe it is my duty to do that math.
>
> I am lucky enough to have had my radio calibrated to 1 Hz off from WWV.
> At least, I am
> trusting Spectran to say the true frequency, and on 14999 USB (dial) my
> radio gave a
> 1001 Hz beat note. I gave up attempting to rock the reference trimmer
> with any precision
> beyond that, it is really not repeatable.
>
> 73,
>
> Jose, CO2JA
>
>
>
> __________________________________________
>
> V Conferencia Internacional de Energía Renovable, Ahorro de Energía y
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