plication) detectors, 53/16 Scintillation, by ionosphere, 9/6 Shielding, minimising EMC, 23/18-20 SANZ (Standards Association of New Scintillation-type fading, 9/13 Ships, satellite communications, 51/17-18 Zealand), 22/27 SCM (Service Circuits Module), Short sight, 7/11 SAPI (Service Access Point Identifier), System 12, 32/10 Shot noise, 10/10-11 layer 1 ISDN, 12/7, 44/9 Scotopic vision, 7/10 Sidebands, SAR (Segmentation And Reassembly) SCP (Service Control Point), AXE AM, 18/4 sublayer, ISDN, 44/16 system, 32/18 television signals, 57/6 Satellite land mobile communication, Screened backshells, 23/26 Sidelobes, antenna energy, 17/5 46/13 SCVF (Single Channel Voice Frequency) Sidereal day, 51/5 Satellites, signalling, 58/4 Sidetone, 30/7, 30/10, 31/4-5 antennas, 17/14-16 SDCCH (Standalone Dedicated Control SIDs (Sudden Ionospheric Disturbances), ARABSAT, 51/3 Channel), ASTRA, 51/18 cellphones, 47/11 Signal flow graph, FFT, 2/10-12 broadcasting from, 51/18 PCN, 48/8 Signal leak, FDM, 20/7 Communication chains, 51/10-15 SDH (Synchronous Digital Hierarchy), Signal listener echo ratio, 30/10 communication with, 6/18, 27/14 11/3, 40/9,40/17-18 Signal space diagrams, modems, 39/6-7 EKRAN, 51/18 basis and need, 42/3-8 Signal to noise ratio, 10/13 EUTELSAT, 51/3, 51/18 broadband standard, 42/26 digital transmission, 19/5-6, 28/4 frequency allocations, 26/7, 26/9-13, control and management, 42/18-19 fibre optics, 53/16-21 26/17, 51/3-5 fibre networks, 53/25-6 FM and AM, 18/9-12 HDTV, 51/19 multipoint application, 52/12 FM and PM, 18/7 history, 51/3 networks, 42/19-25, 56/16 microwave systems, 50/17 INMARSAT, 51/3, 51/17-18 OSI, 16/8 radiowave propagation, 27/5 INTELSAT, 51/3, 51/9, 51/11-12, standards, 42/8-18 satellites, 51/13 51/16-17 SDL (Specification Description suppressed carriers, 18/6 interference problems, 26/7-10 Language), 25/5, 25/6 Signalling, INTERSPUTNIK, 51/3 SDR (Speaker Dependent Recognition), AC line, 43/5-7 launching, 51/5-7 voice, 37/8 analogue network, 43/3-7 MARECS, 51/17 Sea path antenna loss, 6/16