VVS-2\(V\).

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MIL-PRF-49149D(CR)

2.1.1 Reference documents, drawings and publications. The following

other Government documents, drawings and publications form a part of this

document to the extent specified herein. Unless otherwise specified, the

issues are those cited in the solicitation (see 6.2.d).

DRAWINGS

USA COMMUNICATIONS-ELECTRONICS COMMAND

SM-D-771336 - Electronic Control Assembly

(Copies of specifications, standards, drawings and publications required

by contractors in connection with specific procurement functions should be

obtained from the procuring activity or as directed by the contracting

officer.)

2.2 Order of precedence. In the event of a conflict between the text

of this document and the references cited herein, the text of this document

takes precedence. Nothing in this document, however, supersedes applicable

laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 Description. The electronic control is mounted to and limits

operation of the Viewer, Driver's Night Vision AN/VVS-2(V) under damaging

light brightness level.

3.2 Construction. The electronic control shall be constructed to

assure compliance with the contract configuration baseline and in accordance

with SM-D-771336 as applicable.

3.3 First article testing (FAT). When specified in the contract (see

6.2.c and 6.2.f) the contractor shall furnish units for FAT inspection and

approval (see 4.2).

3.4 Materials. The contractor shall select parts and materials that

are fully capable of meeting all of the operational and environmental

requirements specified herein. The materials specified in the applicable

drawings are recommended, but not mandatory. Selection criteria of the class,

grade or type part shall ensure the material will be able to perform its

intended function when it is assembled. Verification of the supplier meeting

the overall performance requirements shall be the governing acceptance

standard. Recovered materials shall be used to the maximum extent possible.

3.5

Performance characteristics.

NOTE: The performance tests of 3.5 shall be performed with a 51 �2

ohm load between pins 1 and 4 of the electronic control.

3.5.1 Power output. When the photo-detector is blocked, the electronic

control shall be within �0.3 Vdc of the input voltage when energized with a

BA-5567/U battery, or equivalent DC power source.

3.5.2 Power cutoff. The output voltage of the electronic control shall

be reduced to 0.2 Vdc or less when the photodetector views a bright target

area between 0.1 and 0.18 footlamberts.

3.5.3

Power restoration.

Output voltage shall return to within + 0.2