User's Manual Part 2

Digital ATSC Exciter-Modulator System Appendix D: Glossary
Axcera Axciter, Rev. 0 D-1
Appendix D: Glossary of Terms
Acronyms Definitions
1x clock 10.762238 MHz symbol clock
8x clock 86.097902 MHz clock
AEQ Adaptive Equalizer
AES Audio Engineering Society (standard for digital audio)
AES/EBU
Audio Engineering Society/European Broadcasting Union
(standard for digital audio)
AFC Automatic Frequency Control
ALC Automatic Level Control
Alias A false signal from beats between signal frequency and sampling frequency
API Application Program Interface
ATSC Advanced Television Systems Committee / Digital TV / DTV
Aural Analog television sound signal
AVGNL Averaging of nonlinear equalizers
BEQ Baseband equalizer
Channel Coder
PC board that accepts SMPTE data and produces clock signals
and ATSC-compliant symbols
Combiner
Notch diplexer for combining separately amplified NTSC
visual and aural signals
dB Decibel measurement of a power. 10 * log (base 10) of the power ratio.
dBm Decibel measurement with respect to 1milliWatt. Measurement of power.
DDS Int 32 bit – Direct Digital Synthesizer – generates a frequency
DSB Double Side Band
DTV Digital Television
DTVAEQ Digital Television Adaptive [linear] Equalizer
EDH Error Detection and Handling
EVM Error Vector Magnitude – measured in percentage
FCC Federal Communications Commission
FPGA Field Programmable Gate Array
Ideali Ideal I (in-phase) channel signal
Idealq Ideal Q (quadrature) channel signal
IEQ Integer Equalizer
IF Intermediate Frequency