[TenTec] Orion II AGC Questions

[Richard Detweiler]

A little background might be of help here,

In the Orion,  with the earlier firmware,  we would set up some standard agc 
settings for agc slow, medium and fast, then use the AGC prog for manuall 
adjusting the agc threshold,  that was before the S meter would rise with 
the adjustemnts and when the articles appeard for using the threshold.

However,  many of the orion users would have trouble with this and have a 
hard time in the heat of a contest, even if you know the agc well.

The RF Gain tie in to the AGC along with the S meter adjustment made the 
process easier, however in my opinion, lost some of the finer control on low 
bands.   Good thing is,  I can move to the firmware of choice for the task 
at hand.

I've found that adjusting the AGC Threshold works very well when chaseing 
low band DX.  For contesting,  it's too much trouble to twiddle the control 
so the RF gain method is a good alternative.

Best wishes.
Rich
K5SF


>From: Kim Elmore <cw_de_n5op at sbcglobal.net>
>Reply-To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>To: tentec at contesting.com
>Subject: [TenTec] Orion II AGC Questions
>Date: Sat, 25 Nov 2006 17:18:27 -0600
>
>As a new Orion II owner, I'm trying to learn about the AGC settings,
>as this seems to be one of the most powerful aspects of the radio.
>
>I've read the manual, along with the white paper "Using Orion's
>Receiver," Found on the orion565 yahoo board.
>
>I'm running firmware version 2.037j. I note that setting the AGC
>threshold moves the S-meter (I didn't expect this) and that adjusting
>the RF gain also moves the S-meter. As I understand it from the
>manual, the RF gain control sets *both* the first IF gain and the DSP
>gain, while the AGC threshold sets only the DSP gain. I'm OK with all
>the concepts, though I've never had the chance to actually tinker
>with such things.
>
>*IF* I'm right about the way the AGC threshold and RF Gain controls
>work (feel free to correct me if I'm not), then how does setting the
>DSP gain separately from the 1st IF gain help? Why not set both
>together and be done with it?
>
>Kim Elmore, N5OP
>
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