HP 70000 series, User Manual

Page: 33 / 447

Electrical Cable Connections
Before making any measurement, be sure that all electrical cables and connectors are clean, in
good mechanical condition, and properly tightened.
CA UTION
T o assure proper electrical connection and no connector damage , all APC 3.5
and SMA connectors must be torqued ve to eight inch-pounds . Do not exceed
eight inch-pounds .
Fiber-Optic Cable Connections
W ARNING
T o avoid the possibility of damage to your eyes , verify a disabled output
at the light source before any cleaning, connecting, or disconnecting of
optical system components .
When making measurements with a lightwave signal analyzer , it is important that all ber-optic
connections be made carefully . Both the front panel tting and the source cable have a
protruding ber-optic tip . Lightwave measurements demand precision mating of awless ber
ends .
CA UTION
The following precautions help prevent ber damage and help assure accurate
light measurements .
Exposed ber-optic tips are easily scratched. Do not allow any object to
touch an unprotected tip . This precaution is particularly important when
installing a connector interface and when making and breaking connections .
Never insert any cleaning tool into an optical connector ferrule; this may
cause damage that can aect the optical system.
Do not touch an exposed ber-optic tip . An oily ngerprint requires cleaning
with cleaning solution.
Before any mating of ber-optic tips , clean the tips with special tape to
assure no dust or other particles remain.
In addition to tape cleaning, clean more thoroughly with cleaning solution
as routine maintenance or if measurements reveal a slightly lower than
expected power level or an increase in reection intensity noise .
Always replace the protector caps on any exposed ber-optic tip .
Cleaning Optical Connectors
The Hewlett-P ackard cleaning kit, HP 15475A, includes recommended cleaning materials and
instructions for optical connectors . F or optical connector cleaning information, refer to the kit
instructions or \Cleaning Dry Connectors" in Appendix C.
1-10 Overview