Neat trick Paul. I tried this and it does resolve the slow keying issue and
like you said, kills the sidetone. It also caused the off-set error because
the vco is no longer shifting frequency on key-down. Keying from the tx-in
vs. key jack produces a 200hz difference in tx frequency much like keying in
fsk mode.
I wonder if this vco shift thing is strictly related to ver. 1.03?
Steve N4LQ
----- Original Message -----
From: "Paul Christensen" <w9ac@arrl.net>
To: <tentec@contesting.com>
Sent: Saturday, August 21, 2004 12:28 PM
Subject: Fw: [TenTec] Omni VI+ firmware rev.
> >So it appears that maybe they screwed up the keying inorder to reduce the
> >chirp. I will find out for sure Sunday. I plan to exchange his chip for
> > mine and see what happens. If anyone else out there knows anything about
> this, please chime in!
>
> It turns out there's an easy way to rule out PLL timing issues and whether
> you're on logic chip V1.02, V1.03 or any other logic chip for that
matter...
>
> If you remove the back TX OUT to TX EN jumper and plug the output of your
> key or keyer directly into TX EN, you will effectively bypass all timing
> circuits (look at the schematic and you will see that all system timing is
> resolved at the TX OUT jack), leaving only hardware issues to resolve. In
> my case, the microchirp was not related to PLL timing or any other
software
> issues. The problem persisted regardless of whether I keyed TX EN or the
CW
> KEY jacks. Note that you will loose side-tone during this test as the ST
is
> a software function.
>
> It's a quick and easy test. Let us know what you find.
>
> -Paul, W9AC
>
>
>
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>
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