VSAT BUCs 
Overview
BUC stands for Block Up-Converter. A transmitting device converts the L-band Intermediate Frequency (carrying voice, data and/or video) to C or Ku-band satellite frequencies. We offer SSPA output power from 2 watts up to 200 watts. The BUC is normally attached directly to the transmit waveguide input of the filter/feed assembly of a Very Small Aperture Terminal (VSAT) dish.
At Emeasat, all of our BUCs are designed for continuous outdoor duty
in all types of environments and are Ideally suited for SCPC, MCPC
,
DAMA, and VoIP applications. Designed to interface with any L-Band
modem, and may be used in a wide variety of communication networks.
Most BUCs use phase-locked loop (PLL) local
oscillators and require an external 10 MHz
reference frequency to maintain the correct
transmit frequency.
BUCs used in remote locations are often 2 or 4 W
in the Ku band and 5 W in the C band. The 10 MHz
reference frequency is usually sent on the same
feedline as the main carrier. Many smaller BUCs
also get their DC current over the feedline,
using an internal DC block.
BUCs are generally used in conjunction with LNBs
(low noise blocks). The BUC, being an
up-converting device, makes up the "transmit"
side of the system, while the LNB is the
down-converting device and makes up the
"receive" side. VSAT system uses both a BUC and an LNB
and is used for
bidirectional internet access via satellite.
The block upconvertor is assembled with the LNB
in association with an OMT, orthogonal mode
transducer to the feed-horn that faces the
reflector parabolic dish
As well as conventional BUCs, we also offer IBUC "Intelligent BUCs". "Intelligent BUCs" have complete monitor and control facilities via FSK to the modem, RS32, RS485, and TCP/IP. When used with phase-locked Low Noise Block Converters (LNBs) with C or Ku-band input and L-band output, with the addition of a TCP/IP interface that serves M and C information and diagnostics on web pages.
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