BMS Truck-Coder II, Инструкция по установке и эксплуатации

Страница: 49 / 49

MPEG-2 A compression standard for digital video and audio data.
Multipath The radio wave propagation phenomenon that results in the
transmitted signals. reaching the receiving antenna by two or
more paths. This condition is not desirable and usually results
in signal fading and interference.
MUX
Multiplex The combining of multiple signals into a single transmission.
Omni-Directional
Antenna
The final transmit element of the microwave system that
radiates the signal approximately equally throughout a 360
degree circle. Does not require aiming of the antenna.
PAL phase-
alternating line
A color encoding used in broadcast television systems in large
parts of the world.
PAT
Program
Association Table
Indicates which PID the PMT is to be found
PID Packet Identifier
PMT-PID
Program Map Table Yields information about the Program, Video PID, Audio PID,
and PCR PID. The PMT-PID default is 200 for BMS systems.
PCR-PID
Program Clock
Reference A time stamp indicating the system time clock value when the
stamped packet leaves the encoder buffer and enters the
decoder buffer used to Synchronize the receiver System Time
Clock (STC) with the transmitter STC. Default is 101 for BMS
systems.
RF: Radio
Frequency
That portion of the Electromagnetic Spectrum that is used for
radio and television transmission.
SDI: Serial Digital
Interface
A digitized video format used for broadcast grade video.
Stand-by The condition of an RF system where all but the transmit
circuits are energized. In this status the system may be
switched into transmit mode instantaneously. (See Transmit)
TNC Connector Threaded version of the BNC connector (See BNC connector)
Transmit The condition of an RF system where it is sending out signal.
(See Stand-by)
YUV The YUV model defines a color space in terms of one
luminance and two chrominance components. YUV is used in
the PAL system of television broadcasting, which is the
standard in much of the world.