Videotek TVM9100PKG Installation And Operation Handbook page 223

Alarm Descriptions
LTC Loss of Time Code
The Loss of Time Code alarm occurs when the peak-to-peak level of the LTC input
signal falls below an adjustable limit for a period in excess of the duration setting.
LTC Time Code Level
The Time Code Level alarm occurs when the peak-to-peak level of the LTC input
signal falls outside the user defined range limits for a period in excess of the duration
setting.
LTC Time Code Framing
The Time Code Framing alarm occurs when the alignment of the start of LTC
(ANSI/SMPTE 12M-1999) exceeds the range limit for a period in excess of the
duration setting.
LTC Time Code Continuity
The Time Code Continuity alarm occurs when a break or interruption in the time-code
count occurs.
LTC/VITC Compare (TC Sync)
The LTC/VITC (TC Sync) alarm occurs when LTC and VITC are compared and differ
beyond the threshold (1 to 30 frames) selection for a period in excess of the duration
setting.
DVITC Time Code Alarm Error Types
The DVITC Time Code Alarms are listed below.
DVITC Loss of Time Code
The DVITC Loss of Time Code alarm occurs when no DVITC Time Code in the video
signal is detected for a period in excess of the duration setting.
DVITC Line
The DVITC Line alarm is used to select the line number on which the D-VITC time
code is detected for the "D-VITC Continuity" and "D-VITC CRC" fields. When time
code is not detected on the selected line number, the alarm activates.
DVITC Continuity
The DVITC Continuity alarm occurs when a break or interruption in the digital vertical
interval time code (VITC) frames occur for a period in excess of the duration setting.
DVITC CRC
The DVITC CRC alarm occurs when the cyclic redundancy check (CRC) within the
digital vertical interval time code field does not correlate with the calculated CRC for a
period in excess of the duration setting
TVM Series Installation and Operation Handbook 199
Copyright © 2008, Harris Corporation