Radyne ComStream TIERNAN SE4000, Installation And Operation Manual

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SE4000 MPEG-2 Contribution Encoder Introduction
01-0934-401-B 2-11
2.6.4 Fault Relay
The Fault Relay is an RJ-11 connector. The fault relay is used in a redundant configuration. In
this configuration input is fed from distribution amplifiers into each of two SE4000s. A Tiernan
redundancy switch monitors the output through the Fault Relay. If the primary SE4000 faults, the
secondary SE4000 automatically takes over operation.
A relay fault condition is defined as:
•
A unit power failure.
•
Unit power switch turned off.
•
Unit is unplugged.
•
A unit hardware failure.
The fault condition is indicated by contact closure between pins one (1) and three (3) and open
contacts between pins one (1) and six (6). The non-fault condition is indicated by contact closure
between pins one (1) and six (6) and open contacts between pins one (1) and three (3).
The illustration indicates the physical locations of pins 1 and 6 within the fault relay port, as
viewed from the rear panel.
When the fault relay detects a fault condition, the fault relay trips, and the Status LED located on
the SE4000 front panel illuminates red.
The SE4000 multiplexer outputs an ASI transport stream with a variable rate of 1 to 80 Mbps.
This transport stream is the combination of the video, audio, and auxiliary data streams in an
MPEG-2 compliant transport stream. The transport stream is always available at the ASI output
ports even if a modulator is installed and operating
2.7 Transport Connection Ports
2.7.1 ASI Out Primary
ASI Out Primary is a female BNC connector with 75O impedance. The port outputs a DVB-
compliant ASI transport stream at rates between 1 and 80 Mbps.
ASI Out Primary is used for normal operation and is typically cabled to the Mod ASI In connector
with a short (14”) coaxial cable.