ARMY MIL-C-70492 (2)-1990 CIRCUIT CARD ASSEMBLY MODEM《电路板组装调制解调器》.pdf

1、1 INCH-POUND I MIL-C-70492 (AR) AMENDMENT 2 12 Nar 1990 MILITARY SPECIFICATION CIRCUIT CARD ASSEMBLY, MODEM This Amendment forms a part of Military Specification MIL-C-70492(AR), dated 8 May 1989, and is approved for use within the U.S. Army Armament, Munitions and Chemical Command and is available

2、for use by all Departments and Agencies of the Department of Defense. PAGE 5 *l. Delete existing 3.2.1. Add: 3.2.1 Functional. The modem circuit card assembly shall be tested using AN/USM-46%Genrad Tester or equivalent in accordance with Test Station Software-Modem CCA: 9379254. PAGE 9 4.6.1, line 7

3、: Delete the fourth sentence starting with ItUpont1 and substitute: “pon completion of the.20 minute exposure, the temperature of the chamber shall be raised at the rate of 1OOC (180FJ per minute plus orminus lOC (1.8OF) to -4OOC (-40OC). At -4OoC, operating power shall be applied to the unit under

4、test and shall continue to be applied until the end of each cycle. The chamber temperature shall then be raised at the rate of 1OOC (18OF) per minute plus or minus l0C (1.8OF) to +7loC (+160F).“ PAGE 10 4.6.2, line 10: Delete t13.2.1.1 and 3.2.1.7 inclusive. It and substitute Ii3.3.3“. FSC 1220 1 of

5、 2 AMSC NIA DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. AMENDMENT 2 PAGE 10 *2 Change 4.6.3. a. Delete existing 4.6.3 and Table IV b. Add the following: 4.6.3 Per

6、formance. The performance of the CCA/Modem shall be tested using AN/USM-465AGenrad Tester or equivalent in accordance with Test Station Software-Modem CCA: 9379254. Custodian: Army-AR Preparing activity: Army-AR (Protect 1220- A372) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-