MIL-DTL-24215D
4.7.4 Life (rotational)(see 3.5.9). The attenuators shall be tested as specified in 4.7.2 and 4.7.3. They
shall then be operated from minimum through maximum attenuation the specified number of times in
a. Cycle shall be from stop to stop.
b. Test condition letter A.
c. Temperature shall be as specified (see 3.1).
d. After test, VSWR and attenuation shall be measured.
The following details shall apply:
a. Unit shall be rigidly mounted.
b. Reference surfaces: Applicable.
c. Test condition letter: I.
d. Measurements - During each of the shock positions outlined, the attenuator shall be adjusted
sequentially to mid range and at each extreme of the attenuation range. After each shock
pulse, it shall be observed that the dial, knob or other type manual adjustment shall not have
moved from its initial position and that the mechanics of the system are sound.
202. The following details and exceptions shall apply:
a. Mounting: Rigid.
b. Electrical load conditions: Not applicable.
c. Test condition letter: A, except the cycle to be performed four times for a total period of 3
hours.
d. Method of determining resonance: Not applicable.
e. Measurements: During the test, the attenuator dial, knob or other type manual adjustment
shall be adjusted to mid range and sequentially to each of the end limit positions at least once
during each of the three directions of vibration. At the completion of each frequency
excursion, it shall be observed that the dial, knob or other type manual adjustment shall not
have moved from its initial position and that the mechanics of the attenuator are in
satisfactory working condition.
f. After test, VSWR and attenuation as specified (see 3.1).
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