Specifications

Alarm Descriptions
VTM Series Installation and Operation Handbook
5-3
Digital Gamut
RGB Upper/Lower
The RGB Upper and Lower alarm occurs when any component of the transcoded RGB
signal falls outside the upper or lower limits for a period in excess of the duration
setting. The Sensitivity can be increased to provide immunity to fast transcoding
spikes.
Lum Upper/Lower
The Luma Upper and Lower alarms scan the composite encoded signal derived from
the selected digital input. The alarms occur when the luminance video falls outside the
adjustable limits for a period in excess of the duration setting. The Sensitivity can be
increased to provide immunity to fast noise spikes.
Peak Upper/Lower
The Peak Upper and Lower alarms scan the composite encoded signal derived from the
selected digital input. The alarm occurs when the peak video falls outside the
adjustable limits for a period in excess of the duration setting. The Sensitivity can be
increased to provide immunity to fast noise spikes.
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 (Standard definition only).
CRC HD
The CRC HD alarm occurs when the internally calculated CRC value is different from
the received CRC value (High definition only).
CRC Alarms
The following information is displayed when the CRC display is ON and an SD format
is detected:
DISPLAY DESCRIPTION
Time since Reset 00:00:00
Hr:min:sec, elapsed time since last reset
FF CRC Seconds
value Full field CRC error in seconds
CRC Seconds
value Active Picture CRC error in seconds
F1 AP CRC
value CRC value (Check Sum) for active
picture, field one
AP
F2 AP CRC
value CRC value (Check Sum) for active
picture, field two
Embedded Audio
value Detects how many groups of audio are
available
Ancillary Data Present
Detects other ancillary information
Format Errors
Detects a format error