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Re: Help designing transponder AGC



I haven't had any experience designing a linear transponder, but the AGC
time constants will have to be similar those in an SSB receiver. Attack time
should be 1 ms or less to avoid transient overloading. It could be as short
as 10 microseconds if there are no filters in the loop.  A release time of
1-2 seconds should be fine.

73,

John
KD6OZH

----- Original Message -----
From: "Pieter Ibelings" <elpieter@hotmail.com>
To: <amsat-bb@AMSAT.Org>
Sent: Monday, 11 June 2001 19:59 UTC
Subject: [amsat-bb] Help designing transponder AGC


> Hi,
>
> I am designing a 435 to 2401 MHz linear transponder and would like to know
> what the typical values are for:
>
> 1. Total conversion gain (435 antenna in to 2401 antenna out)
> 2. Total AGC range ( I am thinking something in the 30 dB range should be
> sufficient)
> 3. AGC time constant (maybe 1 to 2 seconds ?)
>
> This is for a crazy experiment of mine. Who knows if I can get one of
these
> in an Altoids can, we can put them everywhere.
>
> Pieter
> N4IP
>
> ----
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>

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