[amsat-bb] Re: PL tone
glasbrenner at mindspring.com
Mon Jun 23 17:14:15 PDT 2008
We shut the PL tone off around the beginning of 2007 if I remember
correctly. We found that the PL tone caused access problems when the
satellite was very busy, due to competing signals blocking the receiver, and
no downlink being passed to clue the operators into standing by and letting
the other guy through. The PL tone also just masked non-amateur or
out-of-bandplan signals on the uplink, but the signals were still there
blocking the users, with little chance of being found and eliminated if we
couldn't hear them.
We have a new PL mode we can try sometime that will turn the downlink on for
n minutes, and switch to a nonPL'ed uplink for that time. This mode may let
us run a higher power downlink, but it makes battery management problematic.
73, Drew KO4MA
----- Original Message -----
From: "Ollie Eisman" <ollie at ollietech.com>
To: "AMSAT-BB" <amsat-bb at amsat.org>
Sent: Monday, June 23, 2008 7:44 PM
Subject: [amsat-bb] PL tone
> Just out of curiosity, why is there currently no PL tone for AO-51
> Ollie, AJ1O
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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