SYSTEM DESCRIPTION AND INSTALLATION MANUAL
HS--700 High Speed Data System
23--20--33
30 Aug 2002
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Page 3--4
Figure 3-4. Shield Grounding Example for Rack Mount Connectors
(4) Power/Signal Grounds
(a) The length of exposed unshielded cable and the length of the drain leads is
critical for proper operation and EMC compliance. Figure 3-5 shows the proper
aircraft grounding method. It is critical that the ground pigtails be individually
connected to the tag ring(s). If the are daisy--chained, there will be EMC
compliance issues. Coaxial cables must have a continuous shield from the cable
into the tray connector. Do not put pigtails coaxial cables.
NOTE:
It is very important this grounding technique be adhered to. Do not tie
the various ground wires to multiple aircraft frame points and depend on
the aircraft structure to supply a low impedance path for the individual
grounds. Only chassis grounds and shield grounds are grounded at
multiple points in the aircraft.