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GV Node
User Manual
Input Timing
Input Timing to Reference
To see the timing relationship between an input and the GV Node’s URS signal
1 Click
Input Config
and select the
SDI IN
tab for that input.
2 Select the
Video
tab and view the
Timing to Reference
data window.
Asynchronous Input Signals
The input detection circuitry in XIO-4901 must be advised when the input signal is
asynchronous to the system timing as defined by the GV Node’s URS signal generated in
the CPU-ETH3 controller. This is because an asynchronous signal will occasionally be nearly
in phase with the reference, causing the the detection circuitry to lock it, only to have the
signal drift away from the reference, unlocking the input circuits. The lock/unlock cycle will
raise error messages, and interfere with system operation.
Defining this input as asynchronous allows the system to ignore the occasional in-phase
situation. The signal can pass through the system, but of course clean switching will be
compromised.
To identify an input signal as asynchronous
1 Click
Input Config
and select the
SDI IN
tab for that input
2 Select the
Video
tab and view the
Timing Configuration
section.
3 Click the
Asynchronous Input
box to select it.
This input will now be considered asynchronous by the system, and processed
accordingly.
Input Status
You can check the current status of the nine SDI inputs by selecting
Input Status.
