Configuration summary – Grass Valley 8972PX User Manual
Page 11
8972PX — Instruction Manual
11
Configuration Summary
Configuration Summary
This section of the manual gives a summary of the available switching
strategies, how they are configured, and how the module can be manually
controlled by the user.
The input selection to the Program Output can be switched using manual
switching controls at any time by the user or set to switch automatically by
the module’s own autonomous switching strategy mechanism based on the
signal health status of the Primary, Secondary, and (if enabled for use in
autonomous mode), the Alternate input, as determined by the module.
The manual switching controls include the GPI interface, the web page con-
trols, the Newton Control Panel, the hardware pushbutton switches on the
front edge of the module circuit board, and the SNMP commands. Refer to
Manual Switching Controls on page 13
for a complete overview of the
manual switching controls.
When the module is set to operate in an autonomous mode (under control
of the module), the type of switching is selected in configuration as one of
two switching strategies:
•
Maintain Stability – using this strategy, the autonomous control favors
stability on the Program Output and it keeps either the Primary or Sec-
ondary input as the Program output as long as their signals remain
good.
•
Maintain Primary – using this strategy, the autonomous control favors
maintaining the Primary input as the Program Output. If the module
has detected the Primary as not good, it switches to the Secondary. The
module switches back to the Primary input whenever the Primary is
detected as good. The amount of time before the Primary switches back
after being detected as good (Switchback Delay) can be set by the user.
For an overview of the Autonomous mode of operation, refer to
The current Program Output set by the module while in Autonomous
mode can be overridden at any time by the user with a manual switching
control. When this occurs, the switching mode of the module changes to
Manual
. To put the module back into the Autonomous switching mode
(Maintain Primary or Maintain Stability), the user must configure this
setting using the remote controls (Output Control web page, the Newton
Control Panel, or the SNMP get/set commands).