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.
dBd Gain referenced to a perfect dipole
dBi Gain referenced to a perfect isotropic point source
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.
MPEG-2 A compression standard for digital video and audio data.