Comtech-ef-data VIPERSAT File Streamer v1.2.x Manual de usuario Pagina 48

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A-4 VFS User Guide
H
HDLC High Level Data Link Control – A standard defining how data may be transmit-
ted down a synchronous serial link.
HPA High Power Amplifier – The amplifier used in satellite communications to raise
the transmit signal to the correct power level prior to transmission to satellite.
HTTP Hyper Text Transfer Protocol – The Internet standard for World Wide Web
(WWW) operation.
Hub The central site of a network which links to a number of satellite earth sites.
I
ICMP Internet Control Message Protocol
IF Intermediate Frequency – In satellite systems IF frequencies are usually
centered around 70 or 140 MHz, or 1200 MHz (L-band).
IP Internet Protocol – A format for data packets used on networks accessing the
Internet.
ISP Internet Service Provider – A company providing Internet access.
ITU International Telecommunications Union
K
Kb/s Kilo bits per second - 1000 bits/second. A measure of transmission speed. See
also bps & Mb/s.
Ku-Band A frequency band used for satellite communications. For terrestrial earth
stations the receive frequency band is in the range 10.95–12.75 GHz and trans-
mit 14.0–14.5 GHz. See also C-band.
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