DTV 720 USER’S MANUAL
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1.5 Glossary of Terms and Abbreviations
Table 1.2: Glossary of Terms
Term Definition
AC Alternating current
Alarm A condition or notification of a condition that prevents your DTV 720 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 multiplexing
processes, monitors unit operations, and provides interfaces with the net-
work 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 rela-
tionships between all packets and their timing references are unchanged.
ATSC Advanced Television Systems Committee - sets standards for standard defi-
nition 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 programming code.
IEEE Institute of Electrical and Electronics Engineers
LAN Local area network. Your DTV 720 may be connected to an Ethernet LAN.
LCD Liquid crystal display. The front-panel text screen on your DTV 720 is a liq-
uid crystal display.
LED Light-emitting diode. The front-panel indicator lights on your DTV 720 are
LEDs.
Mbps, kbps Megabits per second or kilobits per second - units of data transport rate.
MPEG Moving Picture Experts Group - refers to the method of video compression
established by this group.
NVRAM Non-volatile memory. A memory dedicated to storing the unit’s setup param-
eters. This memory retains its contents through power outages.
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