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Temperature Control
POWER SUPPLY-VIDEO CONVERTER ASSEMBLY

Aviation Electronics Technician 1 (Organizational)
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Figure 6-15.-FLIR positioning/stabilization block diagram. The LOS of the receiver is selected in one of three ways: . By a program in the aircraft’s computer (or a video tracking computer when the system is used with a laser system) . By inputs from the target tracking sight control . By operator adjustment of the azimuth and elevation controls on the control box The control servomechanism WRA processes these azimuth and elevation commands, no matter from which source they come. This WRA will then apply drive signals to the receiver head positioning motors and gimbals. The receiving head is aligned to the desired LOS. If the aircraft should pitch or roll, the gyros (mounted on the receiver head) initiate error signals to a capture loop. This loop creates azimuth and elevation rate signals. The rate signals are fed back to the control servomechanism (CS). The CS will then process these rate signals and apply them to the receiver head as drive signals to maintain the correct LOS. In the manual mode (which uses the target tracking sight control), the stabilization system is inhibited in the control servomechanism assembly. BITE System Most FLIR systems are equipped with a built-in test equipment (BITE) system. The receiver- converter BITE subsystem monitors status signals from the following subassemblies: Camera video Refrigerator unit Gimbals from the control servomechanism assembly Scan mirror and TV camera scan Focus drive of the lenses Heat exchanger 6-13







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