Yeah sorry , I had forgotten about that: you do so well. But, the
majority of hams now do not use FSK. In fact, with the sound card based
rtty, it has really created a great number of those who use RTTY operation,
and much more so than days past when we had clickity clacks sitting around
with noise and oily smells. For those using FSK, you are correct, if the
receive station also has the same setup. Setting a VFO on a single freq is
easy, but like I say, most do not do that. This has been one of the
problems, talking apples and oranges.
Back when I was using RTTY as part of my daily work routine, we gave the
center frequency, and each of the receive stations would dial that freq on
their VFO, then had hardware that determined the mark and space from that.
So the freq given was neither the mark, nor the space. Other services
sometimes gave the mark freq, and other the space freq. So, it has never
been a real world-wide standard even then.
This problem hardly ever came up, when we just had RTTY. But, once PSK came
in as a popular mode, it has been a problem trying to figure out where
people really meant, when they gave a spot. That has carried over to being
a problem on RTTY, because of the use of the sound card programs.
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: "John Becker" <[EMAIL PROTECTED]>
To: <digitalradio@yahoogroups.com>
Sent: Sunday, February 25, 2007 1:56 PM
Subject: Re: [digitalradio] 14100.5 kHz USB - ALE Channel Bandwidth,
IARUBeacon Guardband
> You do have a problem then. I don't
> As I don't have a waterfall or sound card and can't click
> on a thing. Therefore - again - if I say meet me on 14,075
> you will be right on with my mark & space tone with 2125
> 2295. Now if you have what ever you run way off the standard
> you will have to look for me. Its so easy Ray Charles could
> see it... And yes I do have the same tones time after time
> after time. It never changes. I think you see why I *can't*
> use a waterfall frequency now.
>
> John
>
> At 04:13 PM 2/25/2007, you wrote:
> >But- what is default offset? Not everyone has the same thing for an
offset.
> >It is determined properly, by simply starting on one end of the waterfall
> >and clicking every 100 cycles, and transmitting and observing your
transmit
> >output. Where the RF output is the highest (from the sound card - which
> >drives the rig at its highest power) that is your sweet spot on the
> >soundcard, and where you offset should be set. Every computer sound card
I
> >have used has had a different spot where that happens. My present one
> >happens to have its highest curve setting at 1 kc, but others have been
much
> >lower, and some much higher. RTTY IS easier to find, but if someone
gives
> >me that stupid 14.070 freq, and I go to it (14069 on the VFO plus 1 KC on
my
> >sound card), very likely there is NO signal on that freq. But, there are
> >dozens above it, so which one is he when I go there? I have to
individually
> >go to each one, one at a time, and copy till I get a call readout, or in
my
> >case - using WinWarbler I have wideband copy, and go to that window and
> >search down until a call has indicated where he is. Its just so much
easier
> >to use the correct freq in the first place. I dont care where your VFO
is,
> >or what your offset is, and you shouldnt care where mine are either. If
you
> >spot 14.07380 and I click on it, that is where my program sets my tracer
to
> >copy the signal there, and I have the target copied immediately. If you
> >tell me 14.071 in the freq column, and then put a note in "+1280" , my
CAT
> >control is still going to set my vfo to 14.071 and then the waterfall
tracer
> >will be up 1kc from that, putting my trace on 14.072 which is still 1.8
KC
> >off the target- and there will be a dozen signals between my tracer, and
the
> >real station.
> >
> >This is the reason we should all use the waterfall freq, not the VFO
freq,
> >and should train new ops right off the bat, so there is no confusion.
>
>
>
>
>
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8:14 PM
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