Ensemble Designs 9455 3G Clean and Quiet Protection Switch - Manual (Page 23)

www.ensembledesigns.com 7435 and 9455 - page 23
Model 7435 and 9455 Clean and Quiet Protection Switches
Blk Detect Menu
The Blk Detect menu shown on the following page allows you to configure the black detect
parameters. Select the threshold and percentage of black pixels, the portion of the picture to be
considered, and the amount of time that the signal will be evaluated before a fault is generated.
• Window – select Big or Small. This allows a corner Bug to be either excluded or included in
the detection process.
Big – examines nearly the entire raster, approximately 90% of the width and height.
Small – limits the test to a smaller portion of the raster, approximately two thirds of the
picture width and height (somewhat smaller than Safe Title limits).
Default setting is Big.
• Blk Time – select the amount of time from one frame to 300 seconds that the signal must be
continuously in black before the module switches and alarm is generated.
Default setting is 3 seconds.
• Detect Level – set the video value from 0 to 100 IRE, below which a pixel is considered to be
black.
Default setting is 10 IRE.
• Blk Frac – set the percentage of pixels within the detection window that must be black (as
defined by Detect Level IRE setting) in order to trigger a fault.
Default setting is 95%.