If you are listening to a 3khz wide SSB signal at 14.150 mhz, the center of
the signal will be at 14.15015. This is true because we hams use the
suppressed carrier frequency as the frequency for the signal. Since the
suppressed carrier is at 14.150, the center of the USB signal will be 1500
hertz higher.
Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message -----
From: <CaseKE@aol.com>
To: <tentec@contesting.com>
Sent: Monday, July 03, 2006 11:58 AM
Subject: [TenTec] Sweep on Orion II
> Sorry this is so long - the question is short, but the extended story is
long.
>
> OK. This MAY be a senior moment. I have owned both an Orion and an Orion
> II. When I look at the sweep on USB and tune such that the PEAK of the
signal
> on the sweep is at 0, I must then tune down approximately 1.8 kHz to hear
a
> natural voice. Put differently, when I am listening to a natural voice on
USB,
> the peak on the sweep is then showing about 1.8 kHz above 0, of course.
>
> On LSB, the effect is the same, but reversed as would be expected (the
sweep
> peak is 1.8 kHz lower than 0 when listening to the natural voice).
>
> On CW, a perfect audible 700 Hz signal is right at the peak - WONDERFUL!
>
> NOW FOR THE QUESTION (I understand already about sidebands, etc., and
don't
> need a technical explanation): HAS IT ALWAYS BEEN THIS WAY? I WAS TOLD
BY TT
> THIS MORNING THAT BOTH THE ORION AND THE ORION II HAVE ALWAYS BEEN LIKE
THIS
> AND THAT IT IS OPERATING EXACTLY AS IT SHOULD. IS THIS TRUE? I want to
recall
> on the Orion and even during the first two months of the Orion II
(pre-return
> to the factory to fix another problem - see below) that the peak was right
at
> 0 when listening to the natural voice of a station, regardless of USB or
LSB.
> Since the current offset bugs me so much, I'm surprised that I never
noticed
> it before. AGAIN, HAS IT ALWAYS BEEN THIS WAY?
>
> IF YOU ARE STILL WITH ME, LET ME TELL YOU WHY I AM ASKING YOU. When I
first
> got my Orion II, I could not make AFSK operate correctly using EXACTLY the
> same setup that worked so well with the Orion where you need to set the
PBT at
> +1.96 kHz per TT instructions. I called TT service about three times and
> finally, after much experimentation and discussion, I discovered that AFSK
would
> work fine using a PBT setting of -1.96 kHz (minus 1.96 Hz). During the
next call
> to TT to report that this was happening and indicated a possible problem,
I
> was told that OF COURSE a value of -1.96 kHz should be used and that that
was
> how it was on the Orion, also. Well, I still had my Orion at the time and
> could prove differently. That seemed to carry NO WEIGHT. Well, there is
more to
> the story. Another problem came up and I had to return the Orion II to
the
> factory. They not only fixed the problem, but when the rig came back,
AFSK
> worked perfectly JUST LIKE THE ORION at a PBT setting of +1.96 kHz!!!!!
>
> What did I learn?
> 1. Just like in REAL LIFE, people are somewhat disinclined to listen to
the
> facts and to assume that JUST MAYBE the caller has a point and even some
hint
> that should be investigated because it may indicate a more pervasive
problem.
> 2. Just like in REAL LIFE, people's defense mechanisms go sky high right
> away and they seek to justify whatever is the current situation.
> 3. IF YOU ARE TICKED OFF THAT I SEEM TO BE BASHING TT, READ THIS ONE. I
> still think TT is the BEST. I've been a TT user since 1976 and would rate
TT 9.5
> on a 10 point scale. I am now, and will continue to be, a repeat buyer.
> Their service, when something goes back to the factory, is prompt and
excellent.
> 4. I am exceptionally pleased with my Orion II.
>
> 73 to all, Ken K5KC
> _______________________________________________
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> TenTec@contesting.com
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