11-12 Power spectrum, Fourier analysis, 2/6 Penalty parameter, telephone routing, 5/12 quasi-synchronous operation, 46/4-5 Power supplies, Performance management, 16/5 satellite, 46/13 AC, 24/3-8 Perigee satellite motor, 51/5 standards, 46/8-9 accommodation for, 24/14-15 Periodic signals, 10/6-7 systems, 46/3-4, 46/7 computer systems, 24/14 Fourier coefficients for, 2/6 troposcatter use, 46/8 DC, 24/8-13 Fourier transforms, 2/6, 2/7 trunked, 46/5-6 distribution, 24/13 Periodic time, 10/4 PMs (Peripheral Modules), DMS, interconnected AC, 24/7 Permeability, 6/3 32/19-22 maintenance and costs, 24/14 Permutations, 1/5 POCSAG paging format, 45/9-10 management systems, 24/14 Personick integral, optical receivers, 53/21 PODA (Priority-Oriented Demand mobile, 24/14 Peterson's direct coding solution, 14/9 Assignment), 13/21 prime movers, 24/4 Petrol driven supplies, 24/4 POH (Path OverHead), SDH, 42/5, 42/9, public mains, 24/3 PFD (Power Flux Density), satellites, 51/5 42/12-14 reliability and costs, 24/15 Phase coding, SSMA, 13/15 Point codes, PCNs, 48/7 rural multipoint, 52/11 Phase difference, 10/4 Point-to-point radio systems see Radio satellite supplies, 51/8-9 Phase distortion, 10/9 multipoint systems short break systems, 24/5-7 Phase error efficiency, antenna, 17/9 Pointers, SDH, 42/6-8, 42/14-15 site generation, 24/3 Phaser diagram, 18/10-11 Poisson process, small exchange plant, 24/9-10 Phones on the Move, DTI, 48/3 ALOHA models, 3/16 solar generation, 24/3 Phons, 8/6 call arrival, 5/3 standby, 24/4-8 Photodetection/detectors, 53/14-18 Kendall queuing, 3/4 thermal generation, 24/3 InGaAsp, 53/16 Poisson distribution, 1/7 uninterruptible, 24/7-8 Index/17 wind generation, 24/3 satellites, 51/13 RACE (Europe), 11/9 Power and voltage ratios, decibels, 8/4-5 PSNs (Packet switched networks) see Radar, Power/telephone separation testing, 23/8 Packet switching as EMC source, 23/10-11 Poynting vector, 6/3, 6/8, 6/9 Psophometers, line weighting, 10/12, over horizon, 6/18 PPM (Pulse Phase Modulation), 20/9-10, 30/5 signals,