User's Manual

Glossary
Analog
Transmission
Frequency Modulated (FM) method of sending information with
radio waves. An older, dependable method of transmission.
(See Digital Transmission)
Antenna Actuator The mechanism which deploys or retracts the antenna radio
operation or for landing and take-off.
ASI: Asynchronous
Serial Interface.
Transmission standard used to connect video delivery
equipment within a cable, satellite or terrestrial plant.
BNC Connector The Bayonet Neill-Concelman connector is a type of RF
connector used for terminating coaxial cable. (See TNC
connector)
COFDM: Coded
Orthogonal
Frequency Division
Multiplex
A digital modulation method that divides a single digital signal
across multiple (1000+) signal carriers simultaneously. BMS
Coder II family products use COFDM digital modulation.
Composite Video The format of an analog television (picture only) signal before
it is combined with a sound signal and modulated onto an RF
carrier.
dB: Decibel A unit for expressing the ratio of two amounts of electric or
acoustic signal power equal to 10 times the common logarithm
of this ratio.
dBm A unit for expressing the power ratio in decibel (dB) of the
measured power referenced to one milliwatt (mW).
Digital
Transmission
Digitally Modulated (COFDM and others) method of sending
information with radio waves. Newer more reliable method of
transmission. (See Analog Transmission)
Directional Antenna The final transmit element of a microwave system that
radiates the signal one direction, in a directed or focused
narrow beam. This requires aiming of the antenna toward the
receive site.
DTV: Digital
Television
Digital Television uses digital modulation and compression to
broadcast video, audio and data signals.
DVB-T:
Digital Video
Broadcasting-
Terrestrial
An international digital television (DTV) standard that defines
digital COFDM modulation using MPEG2 compression.
GPS: Global
Positioning System
A navigational system using satellite signals to fix the location
of a receiver on or above the earth surface.