Overview
16 Block Up Converter Systems 6700/6900 series User Guide
Redundancy systems
The Codan Redundancy Controller 6586 is used to control two
BUCs and two LNBs (when used) in a redundancy system.
When a detectable fault occurs in the on-line BUC, and the
off-line BUC is serviceable, the redundancy controller
switches over the two BUCs. The interruption to traffic is
typically less than one second. Transmit/receive systems also
include two LNBs, which are switched in parallel with the
BUCS. In such systems, simultaneous switching of both BUC
and LNB occurs when a fault is detected in either the on-line
BUC or the on-line LNB. This is known as stream-switching.
A typical BUC-LNB system comprises:
•a BUC
• an LNB (in transmit/receive systems only)
• a TRF (optional)
• appropriate connecting cables
A typical redundancy system comprises:
•two BUCs
• two LNBs (in transmit/receive systems only)
• an Redundancy Controller 6586
• one or two RF waveguide switches or a combined RF
waveguide/coaxial switch
• a Remote Controller 6570 (optional)
For information on the remote controller see the Hand-held
and Remote Controller 6560/6570 User Guide.
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