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|  MIL-R-23016(Wep)
(Continued)
3.2.9.4.1
necessary, the use of miniaturized components is preferred.
Susceptibility:
3.2.9.4.2
The equipment shall be designed to minimize susceptibility to
interference from other sources. The enclosing case construction
shall be designed not only to minimize interference propagation,
but also to minimize interference pickup from external sources.
Where conducted energy on the power leads or any external leads
might cause interference, the leads shall be isolated from other
leads to avoid coupling, and, where necessary shall have line
filters at their entry into the enclosing case. Receiving antenna
inputs, or any other low-level signal circuits shall be low
impedance or of balanced design, so that coaxial or other shielded
transmission lines can be used to insure an interference-free
installation. Routing of receiving antenna input or any low-level
signal circuit within the equipment shall be so designed and in-
stalled that interference is not picked up from power or control
leads owing to coupling. Antenna or low-level signal circuit
return paths or ground circuit paths shall be so arranged that
interference will not occur owing to common conductive paths with
other circuits, or with the enclosing case grounding path.
Case Shielding:
3.2.9.4.3
The number of mechanical discontinuities in the case (such as
covers, inspection plates, and joints) shall be kept to a
minimum. All necessary mechanical discontinuities in the case
shall be electrically continuous across the interface of the
discontinuity so as to provide low impedance current path.
Multiple-point spring-loaded contacts will be used as needed to
obtain low impedance continuity. Ventilation openings shall
permit conformance to the radiated interference limits. Electrical
bonding shall be provided where access doors or cover plates form
apart of the shielding. Hinges, in themselves, shall not be
considered satisfactory conductive paths.
Chassis, Case and Mounting Continuity:
3.2.9.4.4
The mating surface of the chassis, case, and mounting shall be
free of all insulating finishes in order to provide a continuous
electrical bond between these items and to enable the installing
activity to accomplish bonding contact to the basic structure.
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