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Index > B - Pg. 312

312 Index Amplitude modulation (AM) , 159 , 160f . See also Quadrature amplitude modulation Amplitude shift key (ASK) , 162 , 163f Analog-to-digital converter (ADC) for data conversion , 34 , 118 for digital TV , 252f parallel output of , 120f serial output of , 120f Antenna , 151 , 170­175 dipole , 170 , 172f electromagnetic fields from , 152f ground-plane , 170 , 171f horn , 172­173 loop , 171­172 microwave , 172­175 , 174f patch , 171­172 , 174f transmission lines to , 172 , 174f Yagi , 170­171 , 173f Arithmetic circuit , 111 Arithmetic logic unit (ALU) , 10 , 10f accumulator in , 130 in computer , 10 , 10f , 126 data processing by , 130f as logic circuit , 111 operation of , 129­131 ASCII . See American Standard Code for Information Interchange ASK . See Amplitude shift key Aspect ratio , 248 , 249f Assembly (programming language) , 142­143 Astronomy, radio , 179­181 Asynchronous transfer mode (ATM) , 216 , 217 ATM . See Asynchronous transfer mode Atom , 16 , 17f Audio amplifier , 63 digital , 231­239 dynamic range of , 233 early recording media for , 232 electronics , 229 Audio-video receiver (AV receiver) , 239­243 diagram of , 241f radio in , 242 Automatic gain control , 166 AV receiver . See Audio-video receiver B Band-pass filter (BPF) bandwidth of , 75 response curve of , 74f symbol for , 74f Band-reject filter (BRF) , 74f Bandwidth of BPF , 75 modulation and , 161f of radio , 160 , 161f BASIC (programming language) , 143­144 Battery , 29f cell voltages in , 30t charging of , 31 as DC source , 29­31 diagram of , 30f multimeter measurement of , 56f as power supply , 82 primary cells in , 31 secondary cells in , 31 types of , 30t BCD . See Binary-coded decimal Binary data word , 92 Binary digits , 90 Binary numbers , 90­100 decimal conversion from and to , 90­92 hardware representation of , 91 maximum number of states in , 93t Binary phase shift keying (BPSK) , 163 , 163f spectral efficiency of , 197t Binary-coded decimal (BCD) , 93­98