Specifications

Alarm Descriptions
VTM Series Installation and Operation Handbook
5-10
Teletext Not Detected – Analog
The Teletext Not Detected - Analog alarm occurs when the presence of Teletext is not
detected for a period in excess of the duration setting.
Teletext Not Updating – Analog
The Teletext Not Updating - Analog alarm occurs when Teletext carrier is present and
the data word is the same for a period in excess of the duration setting.
XDS Not Detected – Analog
The XDS Not Detected - Analog alarm occurs when the presence of XDS is not
detected for a period in excess of the duration setting.
XDS Not Updating – Analog
The XDS Not Updating - Analog alarm occurs when XDS is present and the data word
is the same for a period in excess of the duration setting.
Time Code Alarm Descriptions
There are two type of Time Code Alarms: LTC and DVITC Time Code Alarms.
LTC Time Code Alarms
The LTC Time Code Alarms are listed below.
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.