[Elecraft] K3s & P3 used with Data

[Bob]

Interesting...

Guess I am having trouble wrapping my mind around it.  The bandwidth of the
channel is supposed to be 2.4 KHz.  But the implication on the P3 scope is
that it is an AM signal -- 1.2 KHz below the carrier and 1.2 KHz above the
carrier.  That's not enough bandwidth for a SSB signal.  Maybe the scope is
centered so that it is 2.4 KHz above the carrier and 2.4 KHz below.  That
might make sense (although it would imply a 4.8 KHz wide AM/DSB signal).

No matter what the scope says, I don't understand why it has to be put into
DATA REV in order to decode signals obviously sent as USB.

Glad to know something isn't broken, but I don't understand the DATA REV
bit.

73, Bob

On Thu, Jan 31, 2019 at 6:20 PM Bob McGraw K4TAX <rmcgraw at blomand.net>
wrote:

> That is normal to comply with the 60M frequency and BW allowed.
>
> 73
> Bob, K4TAX
>
>
> Sent from my iPhone
>
> > On Jan 31, 2019, at 5:15 PM, Bob <WB4SON at gmail.com> wrote:
> >
> > I've been using my K3 & K3s for years using the DATA mode.  It has worked
> > as if it were in the USB mode, and shows on the P3 scope to the right of
> > the dial frequency just like a USB signal would.
> >
> > Today I tried 60 meters for the first time.  I could pick up signals and
> > decode them just fine in USB mode, and the P3 showed the signals to the
> > right of the dial frequency as expected.  However, when I shifted the
> radio
> > into DATA mode, the P3 seemed to shift as if it was showing a double
> > sideband signal (half below the suppressed carrier and half above).  At
> > this point, when in DATA mode, nothing would decode until I selected REV
> > DATA.  The result of that was that calculated frequencies were wrong
> > (appearing that signals were significantly outside the US channel limit.
> >
> > Am I missing some setting, or is there something unique about how the
> DATA
> > mode works on 60 meters?
> >
> > 73, Bob, WB4SON
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