How to read the test certificate

Test Certificate Page

Video Standard - This summarises the number of video lines, whether the video is progressively scanned or interlaced and the frame (or field) rate per second. For example, a 576i60 video standard denotes 576 video lines with interlaced fields at 60 fields per second whereas 576p30 denotes 576 video lines with progressive frames at 30 frames per second. A frame represents a whole video image whereas a field represents even or odd lines in a video image.

Video Scan - This will be blank if the video is progressively scanned or will state “upper (or lower) field first” if the video is interlaced. The HardingFPA will state “assumed” upper (or lower) field first if the video field order flags were not detected or not present. The assumed field order is derived from default field orders for the specified video standard.

Frame Dimensions - This represents the width and height of the video picture in pixels. Please note that all video feeds are resized and analysed in 16:9 format regardless of input video dimensions.

Active Area - This will only appear if 4:3 centre cutout analysis mode has been selected.

Summary of Results - This summarises the number of failed frames according to Red flash, Spatial pattern and Luminance flash analysis plus a log of extended failures. The latter occurs when flash analysis persists close to failure for several seconds. The Harding will only generate a pass if there are no failed frames in any category.

Analysis Results Pages

RED - The results of red flash analysis in the range of 0.0 to 3.4. A value of 0.3 or 0.4 indicates a warning while a value of 0.5 and above indicates failure.

SPAT - The results of spatial pattern analysis in the range of 0.0 to 3.4. A value of 0.3 or 0.4 indicates a warning while a value of 0.5 and above indicates failure.

LUM - The results of luminance flash analysis in the range of 0.0 to 3.4. A value of 0.3 or 0.4 indicates a warning while a value of 0.5 and above indicates failure.

X - The presence or absence of an extended failure condition. This column will either be blank or will contain an “X” symbol to indicate when an extended failure condition has occurred. An extended failure occurs when luminance or red flash analysis generates warning values of 0.3 or 0.4 for at least 80% of the most recent 5 seconds.

IMAGE - The image column will normally contain the first and last images of the failed sequence. If the failed sequence is too short to display both images, only the first image will be displayed. If the failed sequence is longer than an entire page column, the first and last images for that column will also be displayed.

For questions related to the reading of the certificate, please contact Cambridge Research Systems on 01 634 720707 or by e-mail sales@hardingfpa.co.uk.