R: [amsat-bb] more tests

["i8cvs" <domenico.i8cvs@xxxxxx>]

----- Original Message -----
From: Francesco Messineo <iz5dwf@AMSAT.Org>
To: <amsat-bb@AMSAT.Org>
Sent: Thursday, August 02, 2001 12:24 PM
Subject: [amsat-bb] more tests


> Now the question is: I'm hearing something that is well known? Or it's
> a product of an image frequency? Can I assume that the LO frequency of
> my dowconverter is reasonably precise (given that they say it should
> convert 2400 MHz frequency to 144 MHz)? How can I test that the LO freq
> is what it should be?
> Has anyone a sample wav file of the AO-40 beacon, just to hear how it
> should
> sound like?
>
> Thanks and best regards.


Hi Francesco,

I was not able to find you in to the Callbook because you are probably
a relatively new licenced.

>From your  locator i see that you are very close to Florence in wich we have
many very well equipped Radio Hams  in condition to help you and check
the frequency of your Parabolic converter using HP calibrated generators.

In any case to verify at first your LO XTAL frequency is a simple matter to
open the converter box and  use a frequency counter to read directly the
XTAL frequency.

If the Parabolic converter covers 2400-2402 MHz with an IF of 144-146 MHz
the LO should be 2256 MHz

The most popular multiplication is by 18 so that your XTAL should be
2256/18=125.33333 MHz
Please verify.

About the 400 PSK beacon  please call me on the phone any time 081 -8474135
and i will let you hear on the sound from my tape recorder.

I would like to know if your converter is directly connected to the helix or
if  you run coax cable in between.

Waiting for your comments 73 de i8CVS Domenico


> --
>
> _ _ _ ___   ___ _ ___ ___   ___ ___ _ _ _   _ _ _ ___ ___   ___ _ _   _
>
> Francesco Messineo iz5dwf@amsat.org
> _ _   ___ ___ _ _   _ _ _ _ _   ___ _ _   _ ___ ___   _ _ ___ _
>
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