Message-ID: <3A587B33.E1D3A4BD@usa.net>
Date: Sun, 07 Jan 2001 15:20:35 +0100
From: "Alberto di Bene" <dibene@usa.net>
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To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: ARGO Build 113
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LAWRENCE MAYHEAD wrote:

> Good morning Alberto,
> I have another small problem with build 113 recently downloaded.A signal
> which produces a good display on build 110 seems to be far too strong for
> 113.So I have to reduce the sensitivity greatly, or I have to switch OFF the
> AGC. It seems as if this switch function is reversed! on build 113. What do
> you think. 73s Laurie.

Hello Laurie,
              thanks for the feedback.
The fact is that the program is optimized for weak, very weak, signals, and the
last mods to the AGC routine are a further step in that direction.
So, with strong signals Argo is blinded, so to speak.
The AGC function is not reversed. Probably you were in a condition of low
noise and strong signal, and this new AGC compares the strength of the signal
to the background noise level to compute the brightness to put on the screen.
Build 110 used a different method.
I will put in the next version a low sensitivity mode, for when the signals are strong.

73   Alberto   I2PHD