ND SatCom SKYWAN IDU 7000 Manual page 150

Appendix C - Glossary
Term
SkyNMS Network
Management PC
®
SkyWAN Channel
®
SkyWAN Station
®
SkyWAN
Spot Beam
Star network
Symbol Rate
Time Division Multiple Ac-
cess (TDMA)
Transponder
Uplink
VSAT
X Band
8-PSK
146
Definition
A PC on which the SkyNMS software is installed and running.
The PC is locally connected to a SkyWAN
ernet port.
occupies frequency bandwidth on a satellite transponder for a
®
SkyWAN network; is configurable by SkyNMS.
Ground equipment that transmits and receives electromagnet-
ic waves in a SkyWAN
ND SatCom SkyWAN
supports voice, video and data applications in the most band-
width- and cost-effective manner. Main functionality is provid-
®
ed by the SkyWAN
A spot beam is a satellite signal that covers a concentrated ge-
ographic area so only antennas in that area will receive the sig-
nal.
VSAT topology whereby a remote location communicates with
another remote location by routing through a hub
Also known as baud or modulation rate is the number of sym-
bol changes (signalling events) made to the transmission me-
dium per second using a digitally modulated signal or a line
code. Often used modulation techniques in VSAT communica-
tions are QPSK and 8PSK.
Channel access method that allows applications or users to
share the same frequency by dividing the full bandwidth into
specific timeslots.
A combination of receiver, frequency converter, and transmit-
ter package, physically part of a communications satellite.
Transmission of a signal from an earth station to a satellite.
See also Downlink.
Very Small Aperture Terminal is a station with an antenna that
is typically less than 3 meters in diameter.
Frequency band with uplink 7.9 to 8.4 GHz, downlink 7.25 to
7.75 GHz. This band is primarily used for military communica-
tions systems.
8-PSK phase shift modulation involves eight levels of phase
shift and encodes three bits per symbol. See also QPSK and
Symbol Rate.
Network Design and Engineering Guide
®
network.
®
is an MF-TDMA VSAT system that
IDU series.
®
IDU over the Eth-
2010-10-26