Re: [amsat-bb] AO-40 data mode

["Jeff Griffin" <jeff.griffin@xxxxxxxxxxx>]

 You could use one of the wide IF front end's sold by Symek. I have a 76k
wide front end IF on my 847, that allows a bypass front-end filtering second
input for a 38k6 baud modem. This also would  allow you to easily find your
d/l(and most everyone else's) , for those of you who are, or have friend's
who are  'find your d/l challenged'

73 Jeff kb2m

----- Original Message ----- 
From: "Joe Fitzgerald" <jfitzgerald@alum.WPI.EDU>
Cc: <amsat-bb@AMSAT.Org>
Sent: Friday, October 24, 2003 11:04 AM
Subject: Re: [amsat-bb] AO-40 data mode


>
>
> One notion I have been thinking about is as follows:  digitize a wide
bandwidth, say 40 kHz with your soundcard.  Lock onto the beacon to run your
AFC loop.  Then you can digitize the desired signal without worrying about
doppler anymore.
>
> Of course the problem with this scheme is that you can't use a standard IF
with 3 kHz bandwidth.  You need at least 40 kHz with I/Q outputs.
>
> -Joe KM1P
>
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