By DAPS Saufley Field
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Teletypewriter Sets The Model 28 family and the AN/UGC-143 series are the two tty sets currently used by the Navy. Although the AN/UGC-143 is not shown in figure 2-17, we will discuss its characteristics later. There are several tty sets included in the Model 28 family with varying weights and sizes. They feature high operating speeds, quiet operation, and are particularly suited for shipboard use under the severe conditions of roll, vibration, and shock. One procedural note: Anyone patching or unpatching circuits from a tty panel must be sure to pull the plug from the looping jack before removing the other plug from the set (machine) jack.
The high-frequency transmit signal can contain either voice or teletype information. Figure 2-5 shows a typical shipboard high-frequency transmit system. The same equipment used to receive teletype messages on low frequencies (teletype, DC Patch Panel SB-1210/UGQ, crypto equipment, and DC Patch Panel SB-1203/UG) are used to send teletype messages on the high-frequency system; but of course, in reverse order. Ground-to-Air An AN/UCC-1(V) or CV-2460 telegraph terminal converts a dc signal into a tone signal.
Antennas—Both transmitting and receiving antennas are horn-driven paraboloids providing high gain and narrow beam widths. Reliability—Designed to be operational more than 99% of the time, including periods of poor propagation. 2-13 SINGLE AUDIO SYSTEM (SAS) SYSTEM CAPABILITIES The SAS incorporates basic capabilities for setting up and operating voice communications circuits. An SAS installation provides the unique capability to communicate in a secure or nonsecure mode, at the discretion of the operator, from a single telephone or NTDS device.
electronics technician communications systems by DAPS Saufley Field
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