CHAPTER 2 OPERATING INSTRUCTIONS

TM 5-6350-264-14&P-9 NAVELEX EE 181-AA-OMI-100/E121 DZ-204 T.O. 31S9-2FSS9-1-9 CHAPTER 2 OPERATING INSTRUCTIONS Section I. OPERATING PROCEDURES 2-1. CONTROLS AND INDICATORS. There are no operator controls or indicators applicable to this equipment. 2-2. NORMAL OPERATING PROCEDURES. The AA is ready for operation after it is installed, tested, and connected to the J-SIIDS Control Unit. Since the startup and shutdown of the AA is dependent upon the presence or absence of power from the J-SIIDS Control Unit, no operating procedures are required. 2-3. EMERGENCY OPERATION. Operation with incomplete surveillance coverage or faulty tamper circuit should be held to a minimum. Extended periods of operation on battery (stand-by) power should be avoided. 2-4. UNUSUAL OPERATING CONDITIONS. Relocation or storage of large objects within close proximity of equipment cabinet will reduce effectiveness of audible signal. Section II. THEORY OF OPERATION 2-5. FUNCTIONAL DESCRIPTION. The Audible Alarm provides an audible indication of an alarm condition when it receives an alarm signal from the J- SIIDS Control Unit. An alarm signal switches on electronic circuitry that produces a loud (min 108 db @ 10 ft), varying (500 to 2, 000 Hz) tone. This alarm indication will continue until the cause of the alarm has been removed and the Control Unit (CU) has been reset. Primary ac power is provided by the CU. This ac power is rectified to dc and used to operate all electronic circuitry including the battery charger. Emergency power is provided by the battery. If ac power fails, the AA will automatically draw operating power from the battery. A tamper alarm is automatically initiated if the AA enclosure door is opened, if the enclosure is pried away from its mounting surface, or if the inner and outer enclosures are shorted together. Figure 2-1 is a simplified block diagram. Figure 2-1. Audible Alarm Simplified Block Diagram 2-1/(2-2 blank)