Re: [amsat-bb] New to Satellite and having problems

["Andrew Rich" <vk4tec@xxxxxxxxxxx>]

Or if you have SSB on UHF, sweep back and forth and you will hear a chirp
when you cross over the FM carrier

----- Original Message -----
From: "Robert Bruninga" <bruninga@usna.edu>
To: <kc8zbc@5thelement.com>; <amsat-bb@AMSAT.Org>
Sent: Wednesday, August 04, 2004 10:32 PM
Subject: Re: [amsat-bb] New to Satellite and having problems


>>> kc8zbc <kc8zbc@5thelement.com> 8/3/04 10:47:11 PM >>>
> I have been unable to receive a clear signal from ECHO...
> I have been monitoring 435.300.

That's the problem.  You must account for Doppler and
it starts out at 435.310 and ends at 435.290 and the rate
of change is fastest in the middle.  For an overhead pass
you will get about 4 minutes 10 KHz high, about 3 minutes
5 Khz high about 2 minutes on freq and then 3 and 4
minutes low respectively.

So listening on 435.300 is the
least amount of time available, though if you cannot see
down to the horizon, and will only be hearing signals for
the middle 3 minutes anyway, its the best you can do.

de Wb4APR, Bob
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