High-frequency transmit systems—Continued black dc patch panel, 1-3 couplers, 1-3 cryptoequipment, 1-3 C-1004 transmit keying and receiver control, 1-3 C-1138 radio set control, 1-3 red dc patch panel, 1-3 SB-988/SRT,  1-3 SB-1210/UGQ, 1-3 teleprinter, 1-3 transmitter, 1-3 transmitter transfer switchboard, 1-3 HPA, 2-8 L LNA, 2-8 Low-frequency systems, 1-2 antennas, 1-2 AN/FRT-72,  1-2 AN/UCC-1, 1-2 black dc patch panel, 1-3 converter comparator, 1-3 cryptoequipment, 1-3 receiver, R-2368/URR, 1-3 red dc patch panel, 1-3 printer,  1-3 reperforator, 1-3 SB-1203/UG dc patch panel, 1-3 SB-1210/UGQ dc patch panel, 1-3 SB-973/SRR, 1-3 LPI, 2-8 M MARCONI antenna, 2-19 MIDDLEMAN,  2-14 MPA, 2-8 Multiplexing, 1-8, 2-13 frequency-division (FDM), 1-10 low speed time division multiplexer (LSTDMs), 2-6 time-division  multiplexer  (TDM),  1-10 twinning, 1-10 N Net control station, 1-12 NECOS, 1-12, 1-13 NAVMACS,  2-12 O ORESTES, 2-13 OTAT/OTAR,  1-14 OTCIXS, 2-13 Over-the-air rekey, 1-14 Over-the-air transfer, 1-14 P Patch panels, 1-3, 1-4, 1-6 Primary ship-shore circuits, 1-14 FSK, 1-11, 1-14 PSK, 1-14, 2-7 Q Quality monitoring, 1-18 AN/SSQ-88 equipment, 1-17 AN/SSQ-88 quality monitoring set, 1-18 program, 1-18 system,  1-18 R RF safety precautions, 2-29 burns, 2-30 dielectric  heating,  2-31 equipment, 2-29 precautions,  2-31 INDEX-3