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Re: 2.4 GHz downlink



Reduce the power on the uplink to remove the "splatter". 5 watts is usually 
plenty to get into the satellite on V/S.

Have you listened to a local signal source to see if your downconverter is 
on frequency, or if there is some offset that you'll need to compensate for? 
The local oscilator in the downconverter multiples many times, so a slight 
mistuning on the xtal fundamental freq can put it way off at 2.4 ghz.

Remember the Doppler shift at 2.4 is pretty high too.

73, Drew KO4MA

----- Original Message ----- 
From: "Rob Palmer" <pinevalleymopars@stny.rr.com>
To: "AMSAT-BB" <amsat-bb@amsat.org>
Sent: Monday, November 14, 2005 1:10 PM
Subject: [amsat-bb] 2.4 GHz downlink


> Well, I thought I had my "S" band downlink done and ready to try on AO-51 
> this week but....on an overhead pass, I heard nothing last night. What I 
> do hear is my uplink splattering the downlink. I have never used a 
> downconverter before, should I hear splatter from my 2 meter uplink? This 
> does not seem right to me. I have a correct power inserter with an att. to 
> kill some of the gain of the dish (K5GNA). The antenna and dish are on 
> opposite sides of the rotor about 5 feet apart. Any help would be great.
>            Rob  KB2YCC ----
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