Q on Repairing an HP 332A Distortion Analyzer

[Norm Dresner]

After taking off the back panel [I thought] very carefully, I've discovered
that the coax from the front panel switch that selects either Normal
[baseband] or RF [Demodulate] input to the [grand]daughter board on the back
panel that contains the RF input network was torn loose because there's no
service loop in the coax and absolutely no way to free the daughter board
from the back panel.

That done, I now want to reconnect the coax to the daughter board with at
least some service loop so the problem won't repeat itself. Before I select
a repair technique, however, [I think] I need to know the bandwidth of the
signal to be carried on this coax. If it's already demodulted and the coax
is only there for shielding then a careful splice would do, but if it really
carries the RF, then [I think] I need to put in a new coax section with
[perhaps] BNC connectors to make it removeable.

I'd appreciate it if anyone with either a manual or knowledge of the unit
could provide some guidence as to the proper way to proceed.

Also, if anyone's done this before, how is the back panel supposed to be
removed without damaging the connection of the coax to the daughter board.

Thanks
Norm

 

[Tweetldee]

The AM detector input on the 332A goes up to 65 Mhz. The output cable of
the RF module carried only the demodulated signal... no RF.
It's been many years since I've been inside a model 331A or 332A, but I
think you will have to resort to removing all the connectors and mounting
hardware for anything that is mounted on the back panel. There are no magic
tricks.. everything is hard-wired.

Cheers!!!
--
Dave M

Good judgement comes from experience, and a lot of that comes from bad
judgement.
"Norm Dresner" <ndrez@att.net> wrote in message
news:Jsdec.8342$K_.261474@bgtnsc05-news.ops.worldnet.att.net...

very carefully, I've
discovered
that the coax from the front panel switch that selects either Normal
[baseband] or RF [Demodulate] input to the [grand]daughter board on the
back
panel that contains the RF input network was torn loose because there's no
service loop in the coax and absolutely no way to free the daughter board
from the back panel.

That done, I now want to reconnect the coax to the daughter board with at
least some service loop so the problem won't repeat itself. Before I
select
a repair technique, however, [I think] I need to know the bandwidth of the
signal to be carried on this coax. If it's already demodulted and the
coax
is only there for shielding then a careful splice would do, but if it
really
carries the RF, then [I think] I need to put in a new coax section with
[perhaps] BNC connectors to make it removeable.

I'd appreciate it if anyone with either a manual or knowledge of the unit
could provide some guidence as to the proper way to proceed.

Also, if anyone's done this before, how is the back panel supposed to be
removed without damaging the connection of the coax to the daughter board.

Thanks
Norm