Separate ground cable
C-10 Appendix C: Ground and RF protection 98-148248-C
C.6.3 Isolation of the ADU from the mounting base
In cases where the ADU is to be isolated from the mounting base, do as follows:
1. Use shoulder bushings and washers (accessories) as illustrated below. Note that the
isolation must be implemented on all four mounting bolts (including the bolt securing
the ground cable).
2. Connect the ground cable at one of the mounting/grounding bolts on the ADU as
illustrated below.
3. Seal the joint with protective coating to avoid corrosion.
Figure C-7: Isolation of the ADU from the mounting base
Isolating shoulder bush
Isolating washer
Plain washer
(stainless steel)
Spring washer
(stainless steel)
Figure C-8: ADU isolation and grounding cable
Isolating shoulder bush
Plain washer (stainless steel)
Ground cable
Serrated washer (stainless steel)
Plain washer (stainless steel)
Spring washer (stainless steel)
Ground
cable
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