INDEX-3 Introduction to radio-frequency communications—Continued electrical, 1-2 to 1-3 Navy frequency band use, 1-10 to      1-13 system introduction, 1-4 to 1-10 Introduction to satellite communications, 4-1 to    4-21 fundamental satellite communications system, 4-2 to 4-15 description of communications satellite system, 4-3 to 4-6 earth terminal characteristics, 4-9 to   4-10 satellite acquisition and tracking, 4-13 to 4-15 satellite characteristics, 4-6 to 4-9 shipboard receive-only equipment systems, 4-12 history of satellite communications, 4-1 to 4-2 Defense Communications Satellite Program (DCSP), 4-2 role of satellite communications, 4-15 to   4-19 advantages of satellite communications, 4-15 future satellite communications, 4-17 to 4-19 satellite limitations, 4-16 summary, 4-19 to 4-21 L Lasers, 5-16 to 5-17 Learning objectives, 1-1, 2-1, 3-1, 4-1, 5-1 Line-of-sight system, 5-8 Links, 5-12 to 5-13 Low frequency (lf), 1-12 M Manual gain control (mgc), 2-16 to 2-17 Manual volume control (mvc), 2-17 Medium frequency (ml), 1-12 Medium frequency and below, 5-2 to 5-8 Microwave, 5-8 to 5-10 Modes of operation, 1-15 Modulation rate, 3-18 Multicoupler, 3-13 to 3-14 Multiplexing, 2-9, 3-30 to 3-34 N Naval tactical data system, 5-10 to 5-13 Naval telecommunications, introduction to, 1-1 to 1-15 Navy frequency band use, 1-10 to 1-13 Navy-only networks, 1-18 Navy operational radio and telephone switchboard (NORATS), 1-18 Noise, 2-10 Noise silencer/suppressor/limiter, 2-23 O Operational equipment, 5-15 to 5-17 Orbits descriptions, 4-3 to 4-6 Order-wire circuit, 2-9 P Part, 1-9 Patch panels, 3-25 Perigee, 4-3 Permanent magnet speaker, 2-30 Phase discriminator, 2-28 Point-to-point, 1-13 Portable equipment, 5-13 to 5-17 Programmed tracking, 4-14 R Radio set control unit, 3-2 to 3-3 Radio frequency amplifier, 3-6 Radio-frequency-carrier shift (rfcs), 3-22 to     3-24 Radio-frequency communications, introduction to, 1-1 to 1-20 Radiotelegraph, 1-2 Radiotelephone, 1-2 Receive multicoupler, 3-13 Receiver characteristics, 2-10 Receiver control circuits, 2-16 to 2-29