Comtech EF Data MBT-4000B - Manual (Page 35)

4–1
Chapter 4. SYSTEM OPERATING
PARAMETERS
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 Range
C-Band
3.625 to 4.2 GHz
4.50 to 4.80 GHz
Ku-Band
10.95 to 11.70 GHz
11.70 to 12.20 GHz
12.25 to 12.75 GHz
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.