[Test-Equipment] Avcom PSA65B info needed

[VE6JY Don Moman]

I have an Avcom PSA65B portable spectrum analyser that is functioning fine,
save for the fact that it is about 10 to 12 db less sensitive then it should
be.  Of course, no documentation is with the unit and a search by Google
didn't turn up anything useful.  Anyone know of a site that one might find
some servicing information?

Thanks,
Don VE6JY