The Orion RF gain control now works by combining AGC threshold (which is
really DSP gain) with RF gain. As you reduce the RF gain setting, AGC
threshold is increased. When AGC threshold reaches its limit as the RF gain
control is further reduced, then the control begins reducing actual RF gain.
Also, as the RF gain control is reduced, the S meter minimum is brought up
to show the reduced sensitivity because of AGC threshold being increased.
The AGC threshold control in the AGC settings sets a limit on the lowest AGC
threshold the RF gain control can use.
Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Robert Carroll" <rlcarroll@patmedia.net>
To: <tentec@contesting.com>
Sent: Saturday, December 04, 2004 9:11 AM
Subject: [TenTec] New Orion Firmware
> I used the new firmware overnight in the 160m cw with no crashes, quite a
> difference from the previous version. The new RF gain control arrangement
> seems very effective, though if anyone can explain just what it does, I
> would appreciate it. I have read that if combines hardware and RF gain,
but
> have also read it affects AGC parameters. I continue to hear some
clicking
> in the right audio channel, more I think than with the previous firmware.
> Also in listening carefully to SSB I can hear some slight rasp in the
right
> channel audio (main receiver on both channels) which I am certain was not
> there using the previous firmware version. I suspect this is related to
the
> click.
>
>
>
> I also have one problem which is easy to clear. When I turn the rig off
and
> later turn it back on, I find that the indicated AGC type is where I left
> it, but the AGC is actually off. Pressing the desired mode restores it.
I
> had not encountered this behavior until the new firmware and am wondering
if
> this is a new or previously reported defect and if anyone else has seen
it.
>
>
>
> Bob W2WG
>
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