MIL-PRF-49166/3A(CR)
intended function when it is assembled. Verification of the supplier meeting the overall
performance requirements shall be the governing acceptance standard.
3.3 Description. The MX-9872(V)3/UA Scanner, herein known as the MX-9872(V)3/UA,
shall consist of the MIL-PRF-49166, MX-9872(V)/UA Scanner with a phase-shift lens and counter
weight assembled and adjusted for 42 Hz operation.
3.4 Construction. The MX-9872(V)3/UA shall be constructed in accordance with drawing
SM-D-807690-3, Mechanical Scanner Assembly, and shall meet the form, fit, function, and
interface requirements of this specification.
3.4.1 Weight. Weight of the MX-9872(V)3/UA shall be 1.55 pounds maximum when
weighed with a scale having an accuracy of 1% or better.
3.4.2 Dimensions. The dimensions and dimensional tolerances of the MX-9872(V)3/UA
shall be in accordance with Drawings SM-D-807690-3 (Mechanical Scanner Assembly), SM-D-
657713 (Cover, Scanner Housing) and SM-D-657620 (Housing Scanner) to ensure items built IAW
this specification physically interface with existing hardware.
3.4.3 Components.
a. Scanner, Mechanical MX-9872(V)/UA
b. Phase-shift lens assembly
c. Counterweight
3.5 Performance characteristics. The characteristics specified herein shall apply as defined in
3.1 through 3.5 described herein except that the particular tests required in MIL-PRF-49166,
including modular transfer function (4.5.8), shock (4.6.4) and vibration (4.6.5) will apply with the
phase shift lens, counterweight and associated hardware removed. Operation shall be at 42 Hz
using the Scan-Interlace, PL-1408/UA.
3.5.1 Scan angle and frequency.
3.5.1.1 Variable scan frequency. Not applicable.
3.5.1.2 Specific scan frequency (42 Hz). Scan frequency of the MX-9872(V)3/UA shall be
adjusted to 42.0, ±0.5 Hz. Scan frequency drift shall not be greater than ±4.2 Hz. Scan frequency
drift shall not be greater than ±4.2 Hz from the frequency at ambient setting (see MIL-PRF-49166
para. 3.14.3) when exposed to high and low temperature environmental conditions (see MIL-PRF-
49166).
3.5.1.3 Synchronous scan frequency. Not applicable.
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