[Orion] AGC Threshold

[Sinisa Hristov]

Gary Tuck wrote:

> If the Threshold setting determines the point at which AGC action
> begins to attenuate the signal, then why does the noise level go down
> when the Threshold is made higher.

The AGC Threshold setting certainly determines the point
at which AGC action begins to attenuate the signal.
But, for convenience, the gain is changed simultaneously,
preventing volume changes for signal exceeding the threshold.

Although implemented differently (DSP),
Orion's AGC Threshold control behaves exactly the same way
as an "ordinary" RF GAIN control (not Orion's).


> I guess I have this image of
> signals below the Threshold level as not being reduced in strength by
> AGC action.

Due to gain change, signals above the threshold retain their volume.


> So, it seems that to turn AGC off would result in a
> maximum Threshold, (>191 uv) not .37uv as the menu reads.

Unfortunately, AGC OFF is implemented incorrectly.
Currently, there is no way to turn the AGC off,
and TenTec seems to have higher priorites.


73,

Sinisa  YT1NT, VE3EA