User's Manual

Chapter 2 System Description
2.3.10 Low Band Exciter (LBE)
The LB
E functions as both an exciter and controller in the Low Band sub-system.
The LBE receives the downconverted LB satellite signal from the Ku-Band VSAT antenna and
trans-codes the received signal into a terrestrial band COFDM waveform. The terrestrial
band waveform is then up-converted to the assigned LB terrestrial S-Band frequency,
creating a main RF output used to drive the LB HPA. In addition to the main RF output, the
LBE also provides an independent, configurable, diversity RF output.
The LBE also performs monitoring and control for a number of LB sub-system components
as well as alarm, RF signal level and status monitoring for several common DRU cabinet
components.
Please refer to the LBE Operating Manual for a more detailed description of the LBE.
Figure 2-21 LBE
SX03-30000-01-M01
2-22