User Manual
Table Of Contents
- Notices
- Contents
- Introduction
- Product Description
- Routine Operation
- 3.1 Chapter Overview
- 3.2 Overview of Controls
- 3.3 Function Buttons
- 3.4 Status LEDs
- 3.5 Display and Keypad
- 3.6 Frequently Performed Tasks
- 3.6.1 Turning the power ON and OFF
- 3.6.2 Activating and deactivating the transmitter
- 3.6.3 Switching between HI and LOW power
- 3.6.4 Selecting Channel and Offset
- 3.6.5 Switching between antennas
- 3.6.6 Switching antenna polarization
- 3.6.7 Switching bands
- 3.6.8 Switching between Analog and Digital modes
- 3.6.9 Setting for Remote operation
- 3.7 Menu Maps
- Channels & Frequencies
- Glossary
- Index
B
Glossary B-1CodeRunner 2 Operator’s Guide/Tech Ref Manual
Glossary
This section describes acronyms and abbreviations used in
communications, broadcasting, and in MRC Products and
documentation.
Table B-1: Useful Terms
Term Explanation
16QAM 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.
3RU 3 Rack Unit height.
4FSK 4-state Frequency Shift Keying
64QAM 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.
A & C Alarm and Control.
ADPCM Adaptive Differential Pulse Code Modulation.
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.
AVG Average.
ASI Asynchronous Serial Interface
A serial communications interface operating at
270 Mbit/sec., generally used in field news-gathering
operations.
Baseband A composite signal in which video and audio signals
are combined together, with video occupying
approximately 0-4.5 MHz and audio modulated onto
subcarriers in the 5-6MHz range. Also called
Composite.
B8ZS Bipolar 8 Zero Substitution, line code format for traffic
data.
BB Baseband.
BER Bit Error Rate.
BiasT A type of interconnection between the IDU and the
ODU. In Bias T wiring, IF and DC are combined and
carried on the coax cable up the ODU; blocking
circuitry prevents the DC from entering the IDU.
BNC Bayonet lock coaxial connector.
BPF Band Pass Filter.
BPS Bits per second.
BPSK Binary Phase Shift Keying
CCITT International Telegraph and Telephone Consultative
Committee, a telecommunications standardizing
committee of the ITU.
CNR Carrier-to-Noise Ratio
COFDM Coded Orthogonal Frequency Division Multiplexing
Table B-1: Useful Terms (Continued)