Specifications

Alarm Descriptions
VTM Series Installation and Operation Handbook
5-4
The following information is displayed when the CRC display is ON and an HD format
is detected:
DISPLAY DESCRIPTION
Time since Reset 00:00:00
Hr:min:sec, elapsed time since last reset
CRC Error Free
value Length of time in seconds CRC is error free
CHROMA
-
Embedded Audio
value Detects how many groups of audio are
available
Ancillary Data Present
Detects other ancillary Chroma information
LUMA
-
Ancillary Data Present
Detects ancillary Luma information
Format Errors Y
*
C
*
Detects a format error
*NOTE: Y=Luma and C=Chroma
The following are CRC Window Format Error types, which are further described in
Table 5-2, and are displayed under FORMAT ERRORS when they are detected:
• SAV PLACED INCORRECTLY (sav)
• LINE LENGTH ERROR (line length)
• FIELD LENGTH ERROR (field length)
• RESERVED VALUES USED IMPROPERLY (reserved values)
• ANC DATA CHECKSUM ERROR (anc checksum)
• ANC DATA PARITY ERROR (anc parity)
• ANC DATA PLACEMENT ERROR (anc placement)
• ABSENCE OF SERIAL VIDEO INPUT (no video)
Press the ENT button to reset the CRC elapsed time to zero and clear the EDH errors.
Table 5-2. CRC Alarm Error Types
Error Type Description
CRC ERRORED
SECONDS
The integer number of seconds in which an EDH or CRC error has existed.
SAV PLACED
INCORRECTLY
SAV is relative to EAV. The number of words is a constant for any given
video format between EAV and SAV. EAV is detected and used as the
reference. The correct number of words is counted, and then SAV is
detected. The SAV Placed Incorrectly alarm occurs when a proper SAV
sequence is not detected or if SAV is detected before the correct number of
words between EAV and SAV.
LINE LENGTH
ERROR
The Line Length Error occurs when there are an incorrect number of words
between EAV and SAV.
FIELD LENGTH
ERROR
The number of lines is constant between the B bit going high and the start of
vertical blanking. The Field Length Error occurs when there is deviation in the
line number count.
(Table continues on next page)