3.10.2.1
Test Method
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NOTE: Expert Government witness should be present
for all final acceptance testing. Note that IEEE
Std 299 requires one magnetic field test (150 kHz),
three electric field tests (200 kHz, 1 MHz, 18 MHz),
and one plane wave test (400 MHz). Also, note that
IEEE Std 299 and NSA 65-6 differ on positioning of
source and receiver.
IEEE Std 299 requires source
outside and receiver inside the shield, while NSA
65-6 requires source inside and receiver outside (to
simulate TEMPEST conditions). For TEMPEST shielding
effectiveness testing, continuous sweeping of seams
at one or more plane wave frequencies should also be
specified, in addition to testing around all door
panels, filters, air duct penetrations and all other
penetrations of the shielding at all test
frequencies. If enclosure is designed specifically
for attenuating microwave frequencies, specify
additional test frequencies above 1 GHz. Such
testing is expensive and should only be used when a
firm requirement exists (e.g., NSA-65-6).
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The test procedure, frequencies, and equipment shall be as specified in
IEEE Std 299 [plus the additional frequencies specified in the contract].
Perform the test as soon as possible after completion of the shielded
enclosure, including installation of services, power/telephone/signal
lines, RF filters, and waveguide vents. Conduct tests with doors closed
and the filters under normal load conditions.
3.10.2.2
Additional Test Points
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NOTE: Use this paragraph if design includes strict
tolerances, high attenuation requirements, and many
penetrations.
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Measure additional test points beyond those specified in IEEE Std 299. Test
points include the periphery of doors and covers, handles, latches, power
filter penetrations, air vent filters, telephone and control line filter
penetrations, and points of penetration by pipes, tubes, and bolts.
3.10.3
Final In Service Testing
Upon completion of acceptance checks, settings, and tests, show by
demonstration in service that equipment and devices are in operating
condition and performing the intended function. Give the Contracting
Officer five working days advance notice of the dates and times for checks
and tests.
-- End of Section --
SECTION 13093N
Page 18
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