RC-1170/1270 Redundancy Switch Controllers
Revision 0
Introduction
1–2
MN-RC-1170/1270
1.1
Overview
This equipment contains parts and assemblies sensitive to damage by
Electrostatic Discharge (ESD). Use ESD precautionary procedures when
touching, removing, or inserting Printed Circuit Boards (PCBs).
A complete redundant system consists of:
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RC-1170 (future product) or RC-1270 Redundancy Switch Controllers
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Redundant amplifier plate with two or three Low Noise Amplifier (LNA)/Low Noise Block-
down Converter (LNB)s
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Interconnect cable up to 400 feet in length
The redundancy switch controller performs the following functions:
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Supplies selectable 13/18 V power to the LNA/LNBs.
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Measures LNA/LNB current.
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Performs calibration on LNA/LNB current.
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Signals a fault with abnormal current deviation.
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Switches LNA/LNB on a priority basis in auto mode.
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Controls waveguide and coaxial switch position.
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Provides a 9-pin EIA-485/-232 serial interface.
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Normal/maintenance switch online during servicing.