Showing 21 - 40 of 81 results

Simplex operation

May 19, 2015

That mode of operation in which communication between two points occurs in only one direction at a time. Contrast with half duplex or duplex operation. ... Read More

Transponder

May 19, 2015

Satellite component that receives, amplifies, and retransmits a TV signal or perhaps many narrower-band data or audio channels. ... Read More

Ultra High Frequency (UHF)

May 19, 2015

The band in the 500 to 900 MHz range, including TV channels 14 through 83. ... Read More

Uplink

May 19, 2015

To transmit to a satellite for relay; also, the dish used to transmit. ... Read More

Very High Frequency (VHF)

May 19, 2015

The band in the 30 to 300 MHz range, including TV channels 2 through 13. ... Read More

Very Small Aperture Terminal (VSAT)

May 19, 2015

A means of narrowcast transmission of video, voice and data by SCPA means to a satellite, typically used in business applications. ... Read More

Video Transmission Services (VTS)

May 19, 2015

The transmission of compressed or wideband video signals. ... Read More

Virtual Circuit (VC)

May 19, 2015

A communication arrangement in which data from a source user may be passed to a destination user over various real circuit configurations during a single period of communication. ... Read More

Virtual Private Network (VPN)

May 19, 2015

A capability that allows users to create their own private information network. ... Read More

Transceiver

May 19, 2015

A combination transmitter and receiver. ... Read More

Time Division Multiple Access (TDMA)

May 19, 2015

A method of accessing a satellite using time separation; sending simultaneous data streams interleaved using a clock to separate the various data packets. ... Read More

Solid State Power Amplifier (SSPA)

May 19, 2015

A high power amplifier using semiconductors to amplify the signal. ... Read More

Spot beams

May 19, 2015

The focusing of energy from a satellite to the ground to concentrate the limited available effective radiated power (EIRP). ... Read More

Synchronous transmission

May 19, 2015

Digital transmission in which the time interval between any two similar significant instants in the overall bit stream is always an integral number of unit intervals. Note: Isochronous and anisochronous are characteristics, while synchronous and asynchronous are relationships. ... Read More

T1

May 19, 2015

TDM digital channel carrier (1.544 MBPS) ... Read More

Telemetry, Tracking and Control (TT&C)

May 19, 2015

Means of accessing the control systems in a spacecraft in order to position and configure the spacecraft; or the facility which monitors and controls the health of a satellite. ... Read More

Teleport

May 19, 2015

Ground facility used to interface with a satellite during communications. ... Read More

Television Receive Only (TVRO)

May 19, 2015

A satellite receiving antenna, also known as a downlink or a backyard dish ... Read More

Terrestrial

May 19, 2015

In communications parlance, this refers to Earth, land or ground-based telecommunications systems. ... Read More

IRD

May 19, 2015

Integrated Receiver/Decoder ... Read More