SYNCHRO SIGNAL CONVERTER

Figure 4-5 is an illustration of a synchro signal amplifier. Indicator lights for input and output excitation, servo follow-up, fuses, an alarm switch, and a dinner switch are mounted on the front of the amplifier. The indicator lights, when lighted, indicate that power is available and the servo system is operating. The 2-amp slow blow fuses are contained in indicators that light when a fuse blows. The alarm switch silences the audible alarm during an alarm condition. An audible alarm will sound for a loss of input or output excitation and for a servo follow-up error. The dimmer switch adjusts the brightness of the indicator lights. A heading dial is also mounted on the back of the panel with a window for viewing ship’s heading. SYNCHRO SIGNAL CONVERTER Synchro signal converters are used to increase the capacity of a synchro signal transmitter system, converting 60-HZ to 400-HZ synchro transmission, 400-Hz to 60-Hz synchro transmission, and converting relative bearing signals to true bearing signals. Additionally, they can convert to a different synchro speed or frequent y, and isolate reflected oscillations from the input synchro bus. Synchro signal amplifiers can be paralleled to increase load capacity. AN/WSN-5 INERTIAL NAVIGATION SYSTEM The AN/WSN-5 inertial navigation sets are installed on larger, newer ships—cruisers and earners. They continuously indicate the bearing and the zenith, thus serving as a reference for measuring the ship’s roll, pitch, heading, and velocity north and east. The sets are a motion-sensing system that provides digital data (i.e., geographical position; horizonal and vertical velocity; attitude angle, and rate of heading, roll and pitch), and analog dual-speed synchro signals (i.e., heading, roll, pitch, velocity north and velocity east) for use by ownship equipment. Two ANWSN-5 sets are usually installed, one in the forward IC gyro room and one in the aft IC gyro room. Ship’s position can be updated automatically by NAVSAT/NAVSTAR or manually from the keyboard. The operational program, which resides in the control power supply, performs the functions necessary to gather navigation and status data, compute position, velocity and attitude, and route the data. It processes this data into a suitable format, and transmits the formatted data to various combat systems users. Also the AN/WSN-5 operational program gathers AN/WRN-5A (V)2 reference data as an additional in- put for updating the AN/WRN-5 navigation data. The Figure 4-5.-Synchro signal amplifier, 4-6