Wegener DTV742, User Manual

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DTV 742 User’s Manual
wegener.com 11 800057-01 Rev. B
1.5 Glossary of Terms and Abbreviations
Table 2: Glossary of Terms
Term Definition
AC Alternating current
Alarm A condition or notification of a condition that prevents your DTV742 from performing
properly
Application Soft-
ware The main host software which sets up the unit hardware, runs the process of acquiring
transport stream sources, sets up and monitors the demodulation and multiplexing pro-
cesses, monitors unit operations, and provides interfaces with the network and local users
ASI (or DVB-ASI) An “asynchronous” bit-serial physical interface for Transport Streams; Transmitting
and receiving functions are designed such that the time relationships between all pack-
ets and their timing references are unchanged.
ATSC Advanced Television Systems Committee - sets standards for standard definition and
high definition television in the U.S. Sometimes used to mean the HDTV standards
Boot loader Software residing in non-writable zone of flash which executes at unit reset
Carrier An RF signal containing coded audio, video, and/or other data
DVB-ASI see ASI
EIA Electronic Industries Association
Ethernet The widely-used LAN technology specified by IEEE standard 802.3
Flash memory A memory dedicated to storing the unit’s software and an image of some hardware pro-
gramming code
IEEE Institute of Electrical and Electronics Engineers
LAN Local area network; Your DTV742 may be connected to an Ethernet LAN.
LCD Liquid crystal display; The front-panel text screen on your DTV742 is a liquid crystal
display.
LED Light-emitting diode; The front-panel indicator lights on your DTV742 are LEDs.
Mbps, kbps Megabits per second or kilobits per second - units of data transport rate
MIB Management Information Base - the database of object definitions
MPEG Moving Picture Experts Group - refers to the method of video compression established
by this group
NVRAM Non-volatile memory; this memory is dedicated to storing the unit’s setup parameters.
This memory retains its contents through power outages.
PAT Program Allocation Table - master table which identifies all the programs in the trans-
port stream. This table associates Program numbers to the PIDs bearing the associated
program’s PMT.