Справочник Пользователя для Microwave Radio Communications LLC STATXU064T1CK
B
Glossary
B-1
STRATA TX Operator’s Guide/Tech Ref Manual
Glossary
This section describes acronyms and abbreviations used in
communications, broadcasting, and in our products and
documentation.
communications, broadcasting, and in our products and
documentation.
Table B-1: Useful Terms
1RU
1 Rack Unit
16 QAM
16-state Quadrature Amplitude Modulation
The signal (video + audio) is imposed onto the 70
MHz carrier by varying both the phase and the
amplitude of the signal while keeping the frequency
constant. There are 16 possible combinations of
phase and amplitude that can be used to carry
information.
MHz carrier by varying both the phase and the
amplitude of the signal while keeping the frequency
constant. There are 16 possible combinations of
phase and amplitude that can be used to carry
information.
3RU
3 Rack Unit
32QAM
32-state Quadrature Amplitude Modulation
The signal (video + audio) is imposed onto the 70
MHz carrier by varying both the phase and the
amplitude of the signal while keeping the frequency
constant. There are 32 possible combinations of
phase and amplitude that can be used to carry
information.
MHz carrier by varying both the phase and the
amplitude of the signal while keeping the frequency
constant. There are 32 possible combinations of
phase and amplitude that can be used to carry
information.
4 FSK
4-state Frequency Shift Keying
8 PSK
8-Phase Shift Keying
8QAM
8-state Quadrature Amplitude Modulation
The signal (video + audio) is imposed onto the 70
MHz carrier by varying both the phase and the
amplitude of the signal while keeping the frequency
constant. There are 8 possible combinations of
phase and amplitude that can be used to carry
information.
MHz carrier by varying both the phase and the
amplitude of the signal while keeping the frequency
constant. There are 8 possible combinations of
phase and amplitude that can be used to carry
information.
64 QAM
64-state Quadrature Amplitude Modulation
The signal (video+audio) is imposed onto the 70 MHz
carrier by varying both the phase and the amplitude
of the signal while keeping the frequency constant.
There are 64 possible combinations of phase and
amplitude that can be used to carry information.
carrier by varying both the phase and the amplitude
of the signal while keeping the frequency constant.
There are 64 possible combinations of phase and
amplitude that can be used to carry information.
A & C
Alarm and Control
ACU
AC to DC Converter Unit
ADPCM
Adaptive Differential Pulse Code Modulation
AES
Audio Engineering Society
AES/EBU
Unofficial name for a digital audio standard
developed as a joint enterprise of the AES and the
EBU.
developed as a joint enterprise of the AES and the
EBU.
AFC
Automatic Frequency Control
AGC
Automatic Gain Control
AIS
Alarm Indication Signal (all one’s)
AMI
Alternate Mark Inversion, line code format for traffic
data.
data.
AVG
Average
Table B-1: Useful Terms (Continued)