Microwave Radio DVC 4000, Руководство оператора

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Glossary A-8 DVC4000 Operator’s Guide/Tech Ref Manual
PC Personal Computer
PCM Pulse-Code Modulation
PCR Program Clock Reference
PCS Personal Communication Services, for example, for
cell phones and beepers.
PDF or pdf Portable Document Format
PER Parity Error Rate
PLC Public Limited Company (UK)
Pwd Password
ØLK Phase Lock
PID Program Identification
PLL Phase Lock Loop
POTS Plain Old Telephone System.
Refers to standard analog phone service sometimes
used as a backup method for communications.
PRBS Pseudo Random Bit Sequence
QAM Quadrature Amplitude Modulation
QPSK Quadrature Phase Shift Keying
The signal (video + audio) is imposed onto the 70
MHz carrier by varying the phase of the signal while
keeping the amplitude and frequency constant.
There are 4 possible values of phase that can be
used to carry information.
RC Right Circular polarization
RCL Received Carrier Level
The strength of a received RF signal in dBm.
RCP Right Circular Polarization
Table A-1: Useful Terms (Continued)
RCU Receiver Control Unit
Rcvr Receiver
RD Receive Data
RDS Radio Data System
RF Radio Frequency
RF B/W Radio Frequency Bandwidth
RF Level RF Power from the transmitter.
RFU Radio Frequency Unit
RMA Return Material Authorization
RPU Remote Pickup
R-S Reed-Solomon
RSSI Receiver Signal Strength Indicator
RX Receiver
RXU Receiver Unit
RZ Return to Zero
SBE Society of Broadcast Engineers
SC Service Channel
SC Single Carrier
SCM Single Carrier Modem or Single Carrier Modulation
SD Standard Definition
SD EMB Synchronous Digital Interface Embedded
SDI Serial Digital Interface
A serial communications interface operating at 270
Mbit/sec. SDI can operate at 1.5 Gbit/sec for HD.
Table A-1: Useful Terms (Continued)