Control Unit IV Reference Manual Glossary
529-0004 Ver.3 A-3
Term Definition
redundancy chipset
Electronic circuit that monitors operations externally and
responds to error conditions automatically. Error responses
include a switch to the backup unit, if there is one, or a reset,
if the backup unit is defective or not present. See also
redundancy system.
redundancy system
In the Electroline addressable system, two identical Control
Units that are cable together in order to improve operational
reliability. The backup unit ensures continued operation should
the master unit fail.
reset
Returning the system to its standard startup state or putting a
program in a state where it can be relaunched.
RF watchdog
Electronic circuit that monitors the modulator by checking the
presence and quality of the control carrier. The RF watchdog
monitors the
TEST IN
or the
RF IN
input on the Control Unit.
When it is connected to the redundancy chipset, the RF
watchdog can be set to either switch to the backup unit, if there
is one, or reset the unit. The watchdog can also be connected in
a closed-circuit configuration, bypassing the modulator and
demodulator.
sequencer
Asynchronous emitter that encodes data containing
commands to switch addressable taps. It also generates the bit
stream and sends data messages to the modulator.
station
Multi-tap or splitter using a common decoder. Used to
distribute the RF signal to a group of subscribers.
status
In subscriber tier management, value indicating the tier or
CATV service that the subscriber has (off, basic or pay for an
OBP system, or off or from A to H for a multi-tier system).
In return path monitoring, the status indicates the position of
the switch controlling the return path signal flow through the
CLEARPath module. For Test Point Selectors, the status
indicates which input is selected (“pay”).
synchronization
Command that copies the subscriber statuses in one unit and
sends it to the other unit in order to create two identical
subscriber status databases. This command is only used in a
redundancy system. See also redundancy system.
tap
In subscriber tier management, a tap is an RF port where the
subscriber’s drop is connected (usually an F connector on a
multi-tap or splitter.
To Next Page
Loading...