[amsat-bb] AO-92 L Band Power

[Mark L. Hammond]

Hi Alan, in the rather safe than sorry category—check your uplink
frequency.    After launch we quickly determined a “best” uplink was 1267.359
MHzMost folks find this to be pretty good.  Then Doppler correction is
important at these frequencies, so adjust for that as well.  One night I
wasn’t quite getting into the bird and knew I should have been.  It was
just a couple kHz off, but enough to make a big difference.  Give that a
shot anyhow. Easy for radios to be off a tad at these high frequencies,
too.

Hope to work you on L-band soon!

Mark N8MH

On Wed, Jul 8, 2020 at 5:52 PM Alan Blind via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> Using 10 Watts, I have not been able to get into AO-92 L Band.
>
> From the AO-92 web site:
>
> ================
>
> ......Since the 435 MHz uplink antenna is used to receive the 1267 MHz
> signals and may present a mismatch at that frequency, pre-launch estimates
> suggest that a power level of 100 watts ERP will be required for
> horizon-to-horizon access in Mode L/v. AMSAT Engineering will issue further
> guidance after in-orbit testing. Look for future articles on the AMSAT
> website and in The AMSAT Journal for equipment ideas and tutorials for
> accessing the L-band uplink.
> ====================
>
> Perhaps my 10 Watts are too low.  Have there been updates from AMSAT on
> recommended L band power?  What power do others run?
>
> Alan
> WA9WUD
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-- 
Mark L. Hammond [N8MH]
AMSAT Director and Command Station