Videotek TVM9100PKG Installation And Operation Handbook page 218

Alarm Descriptions
Letterbox – SD
Letterbox is the top and bottom border surrounding the active video. The top border is
defined as having video below the threshold on the set line and having video above on
the following line. The bottom border is defined as having video above the threshold
on the previous line and video below the threshold on the set line. The Letterbox SD
alarm is activated when either the top line or the bottom line deviates from the user
settings (Standard definition only).
Pillarbox – HD
The PillarBox is the border to the right and left of the active video. The "End of Left
Border" and "Start of Right Border" defines the set points when the video is below the
threshold. If the video is outside of the threshold and CES values for the specified
duration, the Pillar Box HD alarm occurs (High definition only).
Picture Shift
The Picture Shift alarm activates when the luma portion of the video does not exceed
the amplitude threshold along any of the four borders of active video. The "Left/Right"
and "Top/Bottom" border settings define the tolerance of the Picture Shift alarm. If one
or more pixels are above the threshold for each of the four tolerance borders, no alarm
will be declared. For interlaced video formats Picture Shift checks the first field only.
For example, if a signal is 525/59.94 SDI video format, where "Left/Right" is set to 20
pixels, "Top/Bottom" is set to 4 lines, the threshold is set to 2 mV, and the "Duration"
is set to 2 seconds, the alarm will be activated if pixels 1 through 20 or 701 through
720, or lines 1 through 4, or 240 through 244 of active video do not exceed the 2 mV
threshold and exceeds the duration of 2 seconds.
Captioning
CC Not Detected – 608
The Closed Caption Not Detected 608 alarm is activated when the presence of
EIA/CEA-608-B closed caption data on line 21(284) with valid parity bits is not
detected for a period in excess of the duration setting.
CC Not Updating- 608
The Closed Caption Not Updating 608 alarm is activated when closed caption carrier is
present and the EIA/CEA-608-B data word on line 21 is null for a period in excess of
the duration setting.
CC Not Detected – 708
The Closed Caption Not Detected 708 alarm is activated when no valid DTVCC
services are detected for a period in excess of the duration setting.
194 TVM Series Installation and Operation Handbook
Copyright © 2008, Harris Corporation