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|  MIL-D-70789A (AR)
4.8.5.16 EMI-EMC.
The DRU shall be subjected to EMI-EMC
tests in accordance with part 4 of MIL-STD-461, MIL-STD-462 and
MIL-STD-463. Field strengths for RS03 shall be as specified in
3.7.14.
4.8.5.17 Maqnetic compatibility. The DRU shall be tested,
in a facility approved by the government, to ensure that exposure
to a 3 gauss steady-state magnetic field, oriented vertically and
horizontally in three orthogonal directions, shall not result in
degradation in performance.
The DRU shall pass the requirements
of paragraph 3.7.13.
Any demonstrated sensitivity to applied external magnetic fields
shall constitute failure of this test.
4.8.5.18 Electrostatic discharge. The equipment shall be
connected to an electrostatic generator through a 1000 pf
high-voltage cable. After being charged to a potential
difference of 300,000 volts, the equipment shall be discharged
through a 500 ohm resistor. The equipment shall be subjected to a
total of 30 charge/discharge cycles using both positive and
negative charging polarities and at least 3 different discharge
points. Damage to or failure of the equipment to perform as
specified, after exposed to the charge/discharge cycles, shall
constitute failure of the test. The DRU shall meet the
requirements of paragraph 3.7.15.
4.8.5.19
Lightning.
The equipment shall be installed in a
lightning discharge test facility and subjected to 10 lightning
pulses, approximating Figure 19, at a distance of 10 meters. The
equipment shall be operating in the Survey Mode when subjected to
half the strikes and inactive for the remaining exposures. The
DRU is permitted to shutdown when exposed to lightning strikes.
This shutdown is defined as an abnormal shutdown.
4.8.5.20 NBC survivability. The DRU shall be analyzed or
tested for conformance with the requirements in "NBC Contaminants
Survivability Criteria for Army Materiel". Testing shall be
conducted at facilities approved by the government using
accept/reject criteria established by appropriate Government
Agencies. The DRU shall pass the requirements of paragraph
3.8.3.
4.8.5.21 Nuclear survivability. The DRU shall be analyzed
or tested for conformance with paragraph 3.8.2. Testing shall be
conducted at facilities approved by the Government.
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