CMN-91
Installation and Operation Manual
Alarm Descriptions
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 137
CRC-HD: The CRC-HD alarm occurs when the internally calculated CRC value is different from the
received CRC value.
EDH-SD: Per SMPTE RP 165 1994; the EDH-SD alarm occurs when one or more errors are detected
for a period in excess of the duration setting.
Letterbox-SD: The 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 Pillarbox-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.
Timing: The Timing Alarm occurs when the Time and Line range(s) are exceeded for a period in
excess of the duration setting.
Audio Alarms Setup Menu
Menu Selections
Audio Alarms Setup Menu
Selection
Selection Option
Selection Option
Peak Audio
Enable Channel 1
•
•
Enable Channel 16
Level
-30 to 0 dBFS (-10 dBFS*)
Duration
0 to 60 seconds (2 seconds*)
Phase
Enable Pair 1
•
•
Enable Pair 8
Value
0 degrees to 178 degrees*