c.
Symbol generation and position relative to the center of the CRT shows the threat lethality, it does not show or represent any lethality of range, but of condition/mode of the emitter. Highest priority threats (most lethal) are shown

4-4 Change 4
nearest the center. Each symbol de.nes a generic threat type, symbols are modi.ed to show change in the status of the emitter. The symbols are unclassi.ed, the de.nitions of what the symbols mean are classi.ed. The complete set of symbols and de.nitions are contained in TM 11-5841-294-30-2. Each theaterized library EID has a speci.c classi.ed pilot kneeboard produced with it. The unit electronic war-fare officer (EWO) should contact PM-ASE if sufficient cards are not available within his unit for the installed EID.
d. The RSDS on speci.c aircraft has been interfaced with other aircraft survivability equipment. The equipment includes the AN/AVR-2 laser detection set, AN/APR-44(V) continuous wave receiver and the AN/AAR-47 missile warning system.
4.3 INFRARED COUNTERMEASURE SET AN/ALQ-144(V).

Do not continuously look at the infrared countermeasure transmitter (Figure 4-1) during operation, or for a period of over 1 minute from a distance of less than 3 feet. Skin exposure to countermeasure radia-tion for longer than 10 seconds at a dis-tance less than 4 inches shall be avoided.
Ensure the countermeasure set is cooled off before touching the unit.

Observe that the IRCM INOP caution legend illuminates when the OCU ON/ OFF switch is set to OFF. After 60 sec-onds, observe that the IRCM INOP cau-tion legend extinguishes.

The countermeasure system provides infrared counter-measure capability. The system transmits radiation modu-lated mechanically at high and low frequencies using an electrically-heated source. A built-in test feature monitors system operation and alerts the pilot should a malfunction occur. The system is made up of a control panel on the instrument panel and a transmitter on top of the main rotor pylon aft of the main rotor. The countermeasure system gets dc electrical power from the No. 2 dc primary circuit breaker panel and the No. 2 junction box. The 28 vdc is routed through the IRCM PWR circuit breaker in the No. 2 junction box to the transmitter. The No. 2 dc primary bus also supplies 28 vdc through the IRCM CONTR circuit breaker on the No. 2 dc primary circuit breaker panel to the control unit. Panel lighting of the control unit is controlled by the INSTR LTS NON FLT control on the upper con-sole. The source begins to heat, the servo motor and drive circuits are energized, turning on the high and low speed modulators, and a signal is applied to stabilize system op-erations before energizing the built-in test function. After a warmup period the stabilizing signal is removed, and the system operates normally. Placing the ON-OFF control switch momentarily to OFF causes the power distribution and control circuits to de-energize the source and initiates a cooldown period. During the cooldown period, the servo motor drive circuits remain in operation, applying power to the motors that cause the modulators to continue turning. The IRCM INOP caution legend will be lit. After the cooldown period, the power distribution and control cir-cuits de-energize, all system operating voltage is removed and the IRCM INOP caution legend will go off. If a sys-tem malfunction causes the IRCM INOP caution legend to appear, the IRCM INOP caution legend will remain until the control panel ON-OFF switch is momentarily placed OFF. The system can be returned to operating mode by momentarily placing ON-OFF switch OFF, then ON, pro-vided the cause of the malfunction has cleared. For addi-tional information, refer to TM 11-5865-200-12.
4.3.1 Infrared Countermeasure System Control Panel. Control of the countermeasure set is provided by the operator control panel on the helicopter lower console (Figure 2-7). Power to operate the countermeasure set is supplied from the No. 2 dc primary bus through a circuit breaker, marked IRCM CONTR.
　
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