Specifications

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Appendix C - Glossary

SkyNMS Network

Management PC

A PC on which the SkyNMS software is installed and running.

The PC is locally connected to a SkyWAN

IDU over the Eth-

ernet port.

SkyWAN

Channel occupies frequency bandwidth on a satellite transponder for a

SkyWAN

network; is configurable by SkyNMS.

SkyWAN

Station Ground equipment that transmits and receives electromagnet-

ic waves in a SkyWAN

network.

SkyWAN

ND SatCom SkyWAN

is an MF-TDMA VSAT system that

supports voice, video and data applications in the most band-

width- and cost-effective manner. Main functionality is provid-

ed by the SkyWAN

IDU series.

Spot Beam 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.

Star network VSAT topology whereby a remote location communicates with

another remote location by routing through a hub

Symbol Rate 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.

Time Division Multiple Ac-

cess (TDMA)

Channel access method that allows applications or users to

share the same frequency by dividing the full bandwidth into

specific timeslots.

Transponder A combination of receiver, frequency converter, and transmit-

ter package, physically part of a communications satellite.

Uplink Transmission of a signal from an earth station to a satellite.