Vislink Strata RX, Техническое справочное руководство

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Glossary B-4
Strata RX
Operator’s Guide/Tech Ref Manual
PAL Analog color television standard used in many
European countries. Provides 625 horizontal lines of
resolution. Not compatible with NTSC or SECAM.
PER Parity Error Rate.
PLL Phase Lock Loop.
Q Quadature phase.
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.
RCL Received Carrier Level. The strength of a received
RF signal, in dBm.
Rcvr Receiver.
RDS Radio Data System
RF Radio Frequency, any frequency of electromagnetic
radiation or alternating currents in the range from 3
kHz to 300 GHz; as in RF Signal or RF Transmission.
RF Level RF Power from the transmitter.
RFU Radio Frequency Unit - also called ODU
R-S Reed-Solomon
Rx or RX Receiver.
S/W or SW Software.
SC Service Channel.
SC Single Carrier
Table B-1: Useful Terms (Continued)
SDI Synchronous Digital Interface
A serial communications interface operating at
270 Mbit/sec., generally used for in-studio news
operations.
SECAM Analog color television standard used in France,
Russia, and other countries. Provides 625 horizontal
lines of resolution. Not compatible with NTSC or PAL.
SER Symbol Error Rate
Setpt Set point.
SFN Single-Frequency Network
Simplex A channel capable of transmitting information in only
one direction.
Site ID A physical location where any number of modems,
transmitters, or receivers are installed.
SMPTE Society of Motion Picture and Television Engineers
SNR Signal-to-Noise Ratio
STDBY Standby.
Subcarrier An electromagnetic signal that is used as a medium
for placing an information channel above another
information channel.
S-Video Video signal in which the chrominance (color) and
luminance (brightness) information are separated
into separate subcarrier signals. Also called Y/C
Video. Composite Video combines them into one
signal.
SYNTH Synthesizer
T1 1.544 Mbps traffic rate.
Tx Transmitter.
VCO Voltage Controlled Oscillator.
Table B-1: Useful Terms (Continued)