MIL-PRF-22885/90C
Test methods: The text procedure for measuring the NVIS Green A, NVIS Green B or the NVIS Yellow luminance
and color shall be in accordance with MIL-L-85762. The test procedure for measuring the spectral radiance of
the legend for either color shall be in accordance with MIL-L-85762.
(u' - u'1) + (v' - v'1) ≤ r
2
2
2
Formula 1
where:
u', v' - - - -
= 1976 UCS chromaticity coordinates of the test article.
u'1, v'1 - - -
= 1976 UCS chromaticity coordinates of the center point
of the specified color area above.
r- - - - - -
= radius of the allowable circular area on the 1976 UCS
chromaticity diagram for the specified color.
When type S (sunlight readable) displays are required to be night vision goggle compatible, they shall meet the
MIL-L-85762 minimum contrast requirement of 0.4 at rated voltage. Colors for type S (sunlight readable) night
vision goggle compatible displays shall be NVIS Green B and NVIS Yellow (see table III). Colors for the type N
(visible white) night vision goggle compatible displays shall be NVIS Green A and NVIS Green B (see table V).
TABLE I. Electrical ratings.
Contact material
Load
Sea level
50,000 feet
28 V dc
115 V ac, 60 Hz
28 V dc
(amperes)
(amperes)
(amperes)
4
7
7
Silver
Resistive
2.5
7
4
Inductive
2.5
2
2.5
Lamp
Gold
Resistive
1
---
1
Inductive
0.5
---
0.5
Low level life applicable: 30 milli-volts maximum
or peak ac at 10 milliamperes maximum.
EMI shielding (when applicable):
Requirement: The EMI/RFI shielding attenuation shall be not less than 60 dB over the frequency range from
100 to 1000 MHz.
Test method: Switches shall be tested to determine the shielding effectiveness in accordance with
MIL-PRF-22885.
Measurements are to be performed at the following frequencies:
Frequency
Minimum attenuation
100 MHz
60 dB
200 MHz
60 dB
400 MHz
60 dB
600 MHz
60 dB
800 MHz
60 dB
1000 MHz
60 dB
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