The locut and hicut controls are really for SSB and not CW. They move the
passband just on one side of the passband, where as PBT moves both sides in
the same direction. When you move the hicut control, only BW changes
because all the filters have the same locut frequency. Since you only want
the hicut of the passband to change, simply changing filters performs the
hicut job. When you move locut, in order to keep the hicut constant, both
pbt and the filter have to change together. Both controls do exactly what
they say.
So, on SSB if you have interference on the low side of your signal, move the
locut control. If you have interference on the high side of your signal,
move the hicut control.
On CW, these controls work backwards on Orion version 2.062a.
Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message -----
From: "Mark DeBord" <markinkpt@hotmail.com>
To: <tentec@contesting.com>
Sent: Monday, June 25, 2007 5:06 PM
Subject: [TenTec] hi/lo cut on Orion II
> I have read many of the posts dealing with hi/lo cut on the Orion.
> However, just when I thought I had it figured out, I am a little
> confused again.
> I basically have correlated the hi/lo cut functions to that of twin
> passband tuning of the Icom rigs. I can use PBT on the Orion to tune the
> entire passband one way or the other (which is like turning both
> controls on the Icom rigs at the same time). However, I thought with
> hi/lo cut I would be able to tune either side of the passband (like
> turning only one control on the Icom). In operating the hi cut control,
> I can see the change in BW at the same time as change in the PBT (this I
> expected). However, I do not see the same effect when using the lo cut
> option (it also does not matter which mode I am in). Therefore, seeing
> the reaction of lo cut has confused me. The lo cut changes are no
> different to me than adjusting the BW control.
>
> Can someone please help me understand what is going on with this? Just
> for reference, I am using the Orion II with the latest firmware (which
> is outstanding BTW!!) I have never really used this function on the
> Orions, but thought this might be just another tool to help me deal with
> close-in interference (along with all the other tools available with the
> rig!).
>
>
> Thanks,
> Mark
>
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