On Fri, 18 Aug 2006 16:33:25 +0200, "i3hev, mario held"
wrote:

tim gorman wrote:

You might also ask yourself whether it really matters or not. If your signal
is strong enough to begin driving the AGC to limit the system gain do you
really care what the noise level actually is? ....

But you may very well care for the SNR on an interesting weak signal
which you are trying to listen to, while a strong nearby signal
activates your AGC...

In theory the system bandwidth should not allow that strong signal to
hit the AGC. Of course practical systems this may not be true.

However, manual gain control helps if the stronger signal is not
overloading the front end causing gain compression and
intermodulation.

Allison