SYSTEM DESCRIPTION AND INSTALLATION MANUAL
HS--700 High Speed Data System
23--20--33
30 Aug 2002
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(b) The mating surfaces must be free of all paint and other non--conductive
elements and are burnished to ensure a good bond. If the aircraft mating surface
is not conductive, a bonding strap of a least 1/4--inch wide (preferably 1/2--inch
wide) tin coated copper braid can be used between the LRU mounting tray (or
LRU itself if a tray is not used) and the nearest airframe grounding point.
(3) Shield Grounds
(a) The shield wires in the HSU have the shield grounded at both ends. This is
called multi--point grounding and is specified to minimize the adverse effects of
HIRF and lightning.
(b) The shield must not be connected to any LRU or bulkhead connector pin.
(c) Examples of multi--point shield grounding methods are shown in Figure 3-2 and
Figure 3-3. The shield grounding method for rack mount units is detailed in
Figure 3-4. This is the preferred shield grounding method for the HSU rack
mount unit.
Figure 3-2. Example 1, Multi--point Shield Ground
Figure 3-3. Example 2, Multi--point Shield Ground
