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Cisco Network Modules Hardware Installation Guide
OL-2485-20
Chapter 33 Connecting Cisco IP VSAT Satellite WAN Network Modules
Information About the NM-1VSAT-GILAT Network Module
Figure 33-3
ODU Components
Figure
Callout ODU
Component
Function
1
Low noise block converter
(LNB)
Amplifies and converts high-frequency satellite signals into
lower-frequency signals.
2
Transmit reject filter
Filters out transmitted signals so that only signals received from
the satellite enter the LNB.
3
Feed horn
Captures signals from and transmits energy to the reflector.
4
Orthomode transducer
(OMT)
Separates transmitted signals from received signals, which have
different polarization and frequency.
5
Solid state block converter
and power amplifier
(SSPA)
Amplifies and converts the low-frequency signals from the IDU
to high-frequency signals for transmission across the satellite
link.
6
Reflector
Concave dish surface which focuses the energy received from
the satellite to the feed horn and which transfers the energy
transmitted by the feed horn to the satellite.
1
3
6
4
5
2
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