MIL-DTL-24215 Attenuators, Variable \(Coaxial\), General Specification ForThis specification covers variable continuously and variable in steps attenuators for use as attenuating elements in coaxial lines. These attenuators are used for armed services application in the transmission lines of radar, radio, and associated equipment \(see 6.1\).

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MIL-DTL-24215D

4.7.8 Thermal shock (see 3.5.13). Attenuators shall be subjected to method 107 of MIL-STD-202. The

following shall apply:

a. Special mounting: None.

b. Test condition letter: A except temperature extremes shall be those specified (see 3.1) .

c. Measurements: During test, at both temperature extremes, normal operation of the dial assembly

shall be maintained. After cycling, the dial calibration and VSWR shall be tested as specified in 4.7.2.

4.7.9 Humidity (see 3.5.15). Attenuators shall be tested in accordance with MIL-STD-202, method

103, test condition B. The following limits apply:

a. At high humidity, the VSWR and attenuation range shall not deviate more than 10 percent from

those specified in 3.5.2 and 3.5.5.

b. After drying, the VSWR and attenuation range shall be as specified in 3.5.2 and 3.5.5.

4.7.10 Temperature coefficient (when required) (see 3.5.6). The temperature coefficient shall be

determined in accordance with MIL-STD-202 test method 304.

a. Reference temperature shall be those specified (see 3.1).

b. The attenuator shall be measured at each temperature extreme at each setting for step type and

at minimum and maximum setting for continuously variable types.

4.7.11 Seal-coaxial type attenuators (when specified) (see 3.5.14). The attenuator shall be tested in

accordance with MIL-STD-202, method 112, condition B.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the

contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD or in-house

contractor personnel, these personnel need to contact the responsible packaging activity to ascertain

packaging requirements. Packaging requirements are maintained by the Inventory Control Point's

packaging activity within the Military Service or Defense Agency, or within the military service's system

command. Packaging data retrieval is available from the managing Military Department s or Defense

Agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging

activity.

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not

mandatory.)

6.1 Intended use. The attenuators described herein are intended for use in microwave systems to

reduce RF power by a known amount or to a required level. Calibrated precision attenuators may also be

used to calibrate other attenuators having a lower order of accuracy.