System config web page – Grass Valley 8977AP-4B User Manual
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8977AP-4B/4U — Instruction Manual
Remote Configuration
System Config Web Page
Use the System Config web page (
) to perform the fol-
lowing functions on the module:
Output Timing
Select the Primary and Secondary output timing source for the module as
either
Local
(external reference from the 8900GEN-SM submodule mounted
on this module),
Ref 1
(8900GEN-SM submodule is mounted on module in
slot 1 and jumpered for outputting a Ref 1 frame bus),
Ref 2
(8900GEN-SM
submodule is mounted on module in slot 3 and jumpered for outputting a
Ref 2 frame bus) or
Internal
(local oscillator). The signal and genlock status
of each reference source will be reported in the Status and Genlock
columns.
Note
The internal mode is mainly implemented for test and debug purposes during
the system setup of the module or in a standalone configuration where no
timing reference is required.
When a secondary reference source is selected that is different than the Pri-
mary, the module can be configured to switch automatically to the Sec-
ondary selected if the Primary is lost or becomes unlocked or invalid. If you
do not want this action of switching to a Secondary, set the Primary and
Secondary sources to the same source.
Refer to
8900GEN-SM Genlock Submodule Installation on page 12
for an over-
view of using the 8900GEN-SM submodule for reference timing. Also refer
to the 8900GEN-SM Installation Manual available online for complete details
using this submodule for timing applications.
Reference Restore
If the Primary source has failed and a Secondary source is selected and
valid, the following controls allow you to set the module to switch back to
the Primary automatically or manually and determine the amount of time
before the Primary is restored.
•
Switch to Primary
– set this control to
Manual
if you wish to manually return
to the Primary reference when it becomes valid or locked again or
Auto
to allow the module to switch back to the Primary reference.
•
Reference Switchback Delay
– When the control above is set for Auto, set
the amount of time to allow between switching from the Secondary ref-
erence back to the restored Primary. The switchback time has a
minimum recovery time of approximately 30 seconds to assure that the
Primary is locked and valid before the module switches back to that
source.
Use
this
link