HP 83481A, User Manual, Page: 23 / 98

The Instrument at a Glance
The HP 83481A Optical/Electrical Plug-In Module
Getting the best performance
T o ensure you obtain the specied accuracy , you must perform a plug-in
module vertical calibration. The calibration must also be performed when you
move a plug-in module from one slot to another , or from one mainframe to
another . Refer to Chapter 3 for information on performing a plug-in module
vertical calibration.
Installing the plug-in module
Y ou do not need to turn o the mainframe to install or remove the plug-in
modules .
Firmware requirements The HP 83481A is compatible with HP 83480A rmware revisions A.03.01
and above . If your HP 83480A has a rmware revision below A.03.01,
a rmware upgrade is required. F or information on ordering the latest
version of the operating system rmware refer to \Ordering information "
earlier in this chapter . F ollow the procedure for upgrading the rmware
described in the HP 83480A, 54750A User's Guide . If your system includes
an HP 83483A, 83484A, 54753A or 54754A follow the procedure for
re-initializing the modules described in the HP 83480A, 54750A Service
Guide . It is not necessary to remove the side panel to enable the switch as
described in the service procedure . The module is shipped with the switch
enabled.
C A U T I O N
Only electrical modules , such as the HP 83483A, 83484A, 54753A or 54754A,
have to be re-initialized.
DO NOT re-initialize optical modules . If your system includes an optical
module , such as the HP 83481A, 83485A or 83485B , it should NOT be
re-initialized. All optical calibration data would be lost and the module would
have to be returned to the factory for calibration.
1-11