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Chapter 4. SYSTEM OPERATING
4.1
Overview
An introduction to the Monitoring and Control (M&C) features of the MBT-4000B Multi-Band
Transceiver, as well as the operating parameters for the BUC-4000 Block Up Converter, are
provided in this chapter.
4.2
Description
The MBT- 4000B supports Low Noise Block Down Converters (LNBs) for Rx down conversion. It
outputs +17VDC nominal and 10 MHz on the J12 | L-BAND IN connector. The LNB amplifies the
input RF signal and down converts it to L-Band in the range of 950 to 1750 MHz (there may be
instances that the L-Band range = 950 to 1450 MHz). The choice of which downlink frequency
band is determined by the selection of a frequency range, usually from one of LNBs in the
following bands:
Band
C-Band
Ku-Band
LNBs are available that are either externally referenced (EXT REF) or internally
referenced (INT REF). DC power is supplied to the LNB through the IFL cable from
the MBT-4000B for both types.
The standard LNB noise temperature is < 35°K for C-Band, and < 65°K for Ku-Band.
Range
3.625 to 4.2 GHz
4.50 to 4.80 GHz
10.95 to 11.70 GHz
11.70 to 12.20 GHz
12.25 to 12.75 GHz
PARAMETERS
4–1
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