S9407-AB-HBK-010 Datasheet, PDF (191/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
a. The separation specified between LL and PASSIVE, XLL and PASSIVE, and SLL and
PASSIVE shall be maintained between the SLL, XLL, LL category cables, and other interference sources.
Examples of other interference sources are separately mounted transformers, fluorescent light fixtures,
power supplies, power panels, motors generators, controllers, and electronic transmitters.
b. If it is not feasible to maintain minimum separation of cables in the LL and SLL category in any
portion of a cable run within a watertight compartment, the entire cable shall be shielded.
5-3-5 Dual Purpose Cables
Cables serving a dual purpose (transmitting and receiving) shall be identified with both categories.
For example, cables between sonar transducers and terminal equipment may function as both
transmitting cable and a receiver cable. Such a cable should be marked with appropriate shielding
category designators such as SHL/SLL. An rf cable between a communication transceiver and the
associated antenna could be marked RHL/LL.
The shielding and/or separation requirement for a dual purpose cable shall be in accordance with
the methods outlined in the cable chart for the category of cable requiring the greater separation or the
better shielding.
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