GUIDE TO INSTALLATION AND OPERATION
ADX-1901 |
25
Video Black Detection
This alarm detects the presence of a continuous black signal on
the input for a period of time; the condition is flagged only when
the time duration criterion has been satisfied.
Enable the alarm by selecting the checkbox.
The user sets the detection parameters for this error using three
sliders:
•
Threshold (mV) – sets the signal level below which Black
will be considered to have been detected.
•
Set Duration (sec) – sets the time interval over which
Black must be continuously detected before the error is
flagged.
•
Clear Duration (sec) – sets the time interval over which a
non-black signal (i.e. above the Threshold) must be
continuously present to clear the alarm if it has been set.
Use the
LED Color
pulldown to choose the color that will be
displayed by the status LED on the card edge when a Black
Detect alarm is set. Choices are:
•
Green, Yellow, Red, Flashing Red
Zone settings
– define a zone within which the alarm detection
will be applied.
•
Line:
Start
Stop
•
Pixel: Start
Stop
The ranges always start at 1, but the upper limit depends on the
video format. The zone is indicated by the black line and the
video image size by the gray window.
5.9.2 Alarms – Metadata panel
SMPTE2020 Metadata
This alarm checks the presence of audio metadata inserted
(SMPTE-2020) in the input video signal.
Enable the alarm by selecting the checkbox.
The user sets the detection parameters for this error using two
sliders:
•
Set Duration (sec) – sets the time interval over which
Audio Metadata must be continuously absent before the
condition is flagged and the alarm is set.
•
Clear Duration (sec) – sets the time interval over which
Audio Metadata must be continuously present to clear the
alarm if it has been set.
Figure 5-15 Alarms panel – Video – Input Black
Figure 5-16 Alarms – Metadata – SMPTE 2020
