[R-390] IF alignment Using Sweep Generator

Mon, 30 Sep 2002 18:59:56 -0700 (PDT)

Jim,

Tune the IF centre frequency for that narrowest filter you are using. The others filters will be
wider and the bandpass of the Xtal/mechanical filter will fall within the IF.
If the "narrowest" filter were to fall on the "skirt" of the IF bandpass, then the IF gain would
be lower as it would be at the edge of the IF, you would also get considerable distortion on MCW.

Rodney
VK2KTZ

--- Jim Brannigan <[email protected]> wrote:
> Unless one of the filters is way off frequency, the IF bandwidth should be
> broad enough to accommodate the variances.
> 
> Jim
> 
> > Good afternoon list - just thinking abt the procedure thats going to be
> > posted so, here's a topic.  There appears to be an IF frequency unique to
> > each filter and its not exactly 455khz.  Do we align the IF for an average
> > frequency that works for all the filters or just for the filter we are
> going
> > to mainly use?  Does it make any difference?  Food for thought for those
> of
> > us who are retired/bored and looking for when the mil. procedure is
> posted.
> > And if it has been posted and I've missed it would someone please send me
> a
> > copy.
> >
> > Thanks
> > Dave Faria
> 
> 
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