Autonomous mode, Signal health criteria, Autono – Grass Valley 8972PX User Manual
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8972PX — Instruction Manual
Configuration Summary
Autonomous Mode
When the module Switching Strategy is set for an autonomous mode, the
module automatically determines signal status based on enabled signal
health criteria as interpreted by the module for the three video inputs, Pri-
mary, Secondary, and Alternate (when selected for usage in Autonomous
mode on the System Config web page). Refer to the block diagram in
for an overview of the Autonomous mode.
There are two switching strategies in the Autonomous mode: Maintain Sta-
bility and Maintain Primary. One of these must be selected as the Switch
Mode for use in the Autonomous mode using one of the remote controls
(Output Control web page, Newton Control Panel, or SNMP get/set com-
mands).
•
Maintain Stability Mode
– in situations where signal stability on the
program Output is most important, select this mode. When the Primary
has failed and has switched to the Secondary, it will stay on the selected
Secondary until forced back to the Primary manually or the Secondary
fails. This mode provides the least amount of signal interruption (the
most signal stability).
•
Maintain Primary Mode
– in situations where it is favored to have the
Primary input active as much as possible, select this mode. When the
Primary has failed and has switched to the backup candidate, when the
Primary has recovered, the module automatically returns the Primary
to the Program Output. The switchback to the Primary can be set to a
delay to allow the restored signal to establish itself after recovery. The
amount of Program Switchback Delay is set by the user on the Output
Control web page or using the Newton Control Panel.
Signal Health Criteria
Signal health status for the three input signals is determined by certain cri-
teria analyzed by the module. The 8972PX handles HD/SD SDI video
signals or DVB ASI signals and uses different criteria to determine signal
health status. The status of the module inputs (when
Reporting
is enabled on
the I/O Config web page for each input signal) is given on every web page
in the header area at the top of the page and also reported on the Newton
Control Panel and can be read from the GPI interface.
The input format to the module can be selected as
Auto
allowing all of the
signal standards in the Input Standard Selection pulldown (on the
) to be considered valid by the module for any
input. If only a single standard is selected as the input format, only that
standard will be considered valid for any input to the module.