EPAK DSi13Ku Pro, Инструкция по установке и эксплуатации

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8 Glossary
ACU Antenna Control Unit. Used to control the antenna and provide the vessel with internet
access.
Azimuth The horizontal angle a parabolic antenna must be rotated to, in order to point to a
specific satellite in the orbit. It is defined with respect due to north for convenience.
BUC A Block Up Converter is used in the transmission (uplink) of satellite signals. It
converts a band of frequencies from a lower frequency to a higher one. Modern
BUCs convert from L band to Ku or Ka band (depending on the type).
Elevation The vertical angle that a parabolic antenna has to set to point to a specific satellite in
the orbit. Elevation is zero when the antenna points to the horizon.
GPS Global Positioning System
IDU Indoor Unit
Ka-Band The Ka-band covers the frequencies of 29.5–30 GHz, i.e. wavelengths from slightly
over one centimetre down to 0.75 centimetres. The Ka-band is part of the K-band of
the microwave band of the electromagnetic spectrum.
Ku-Band The frequency range from 10.7 to 18GHz.
LNB A Low Noise Block is used for reception (downlink) of satellite signals. It down-
converts a block of high range frequencies to lower range. So LNBs convert Ka or Ku
Band frequencies to L Band.
NMEA Communication standard for marine instruments
ODU Outdoor Unit (Antenna)
openAMIP Open Antenna-Modem Interface Protocol
Skew Skew is the tilt of the LNB in order to align the planes of polarization of antenna & the
satellite.
UPS Uninterrupted Power Supply. Online type is recommended for EPAK systems.
SNR The ratio of signal power to noise power, expressed in dB. The higher the SNR, better
the signal quality.
VSAT Very Small Aperture Terminal. It is a two-way satellite ground station or a stabilized
maritime VSAT antenna with a dish antenna that is smaller than 3 meters.
Doc ID 0304 03.07.20
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