HP 87114B, Service Manual

Page: 82 / 174

A5 Receiver Assembly Replacement
Caution
Please read the following carefully . F ailure to follow instructions may result in
an improperly operating analyzer .
P erform the following only at an approved ESD workstation.
There are four receiver assemblies available for replacement. There are both 50 and 75
versions for the HP 8711B or HP 8712B . There are also 50 and 75 versions for the HP 8713B
or HP 8714B . Make sure the correct version is ordered.
If one or both RF port connectors are damaged, you must replace the plate that contains both
connectors . Do not attempt to replace a single connector by itself. These connectors have been
machine-pressed into the plate to prevent undesired rotation. It is not possible to duplicate this
in the eld.
The replacement A5 receiver assemblies are supplied in their minimal format which may not
work in all instances depending upon installed options . P erform all of the required steps below ,
if applicable .
Note
F or analyzers with option 1E1:
If the analyzer contains the optional 10 dB step attenuator , it is necessary to
remove the attenuator/board assembly from the original receiver and install it
onto the new assembly . Carefully replace the attenuator assembly , ribbon cable
(if required), and any semi-rigid RF coax cables .
F or analyzers with option 1D A or 1DB:
If the analyzer contains the AM delay option, it is necessary to remove the
AM delay board assembly from the original receiver and install it onto the
replacement assembly . Carefully replace the AM delay assembly , ribbon cable
(if required), and any semi-rigid RF coax cables .
Assembly Replacement 3-9