HP 83447A, User'S And Service Manual

Page: 47 / 102

Cleaning Connections for A ccurate
Measurements
A ccurate and repeatable measurements require clean connections . Use the
following guidelines to achieve the best possible performance when making
measurements on a ber-optic system:
K eep connectors covered when not in use .
Use dry connections whenever possible .
Use the cleaning methods described in this section.
Use care in handling all ber-optic connectors .
When inserting a ber-optic connector into a front-panel adapter , make
sure that the ber end does not touch the outside of the mating connector
or adapter .
Because of the small size of cores used in optical bers , care must be used to
ensure good connections . P oor connections result from core misalignment, air
gaps , damaged ber ends , contamination, and improper use and removal of
index-matching compounds .
Use dry connections . Dry connectors are easier to clean and to keep clean.
Dry connections can be used with physically contacting connectors (for
example , Diamond HMS-10/HP , FC/PC, DIN, and ST). If a dry connection
has 40 dB return loss or better , making a wet connection will probably not
improve (and can degrade) performance .
C A U T I O N
Hewlett-P ackard strongly recommends that index matching compounds NOT
be applied to their instruments and accessories . Some compounds , such as
gels , may be dicult to remove and can contain damaging particulates . If
you think the use of such compounds is necessary , refer to the compound
manufacturer for information on application and cleaning procedures .
Cleaning Accessories
Item HP Part Number
Isoprop yl alcohol 8500-5344
Cotton swabs 8520-0023
Small foam swabs 9300-1223
Compressed dust remover (non-residue) 8500-5262
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