[R-390] IF sweep alignment

[rbethman]

I have a couple of receivers or receiver sections of transceivers that 
specify this methodology for alignment.

However, unless this is a "personal" exercise in curiosity, I don't see 
where a sweep alignment of the IF on an R-390 or R-390A has ever been 
part of an alignment.  This simply is not in ANY of the numerous manuals 
out there for these receivers.

It leaves me puzzled as to the reason for doing so.

Just my $0.02 worth.

Bob - N0DGN