Ensemble Designs 7160 Serial Digital Protection DA - Manual (Page 32)

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Model 7160 HD/SD/ASI/310 Protection DA
Black Detect Menu
The Blk Detect menu shown below allows you to configure the following black detector parameters:
Window • – select Big or Small. Big examines nearly the entire raster. Small limits the test to a
smaller portion of the raster (somewhat smaller than Safe Title limits).
Blk Time • – select the amount of time from one frame to 300 seconds that the signal must be
continuously in black before the protect switch (and alarm) is generated.
Detect Level • – set the video value from 0 to 100 IRE, below which a pixel is considered to be
black.
Blk Frac • – set the percentage of pixels in the detection window that must satisfy the detection
level parameter.
The following status displays are also provided and can be monitored with Avenue PC alarms:
Pri Valid • – shows the portion of the Primary input which currently exceeds the Detect Level
parameter. This display tracks the actual video content.