Grass Valley DEC-1023 - Manual (Page 21)

GUIDE TO INSTALLATION AND OPERATION
DEC-1023 | 17
Chroma Max: Detects whether the amplitude of the
chroma information in the video signal is too high by
verifying if the peak chrominance of the input video
signal is less than a specified threshold.
ENABLE: check to enable this test.
THRESHOLD: set the level (in %) above which this
condition will be flagged
Freeze Detection: Detects whether a sequence of
video frames are identical by verifying if it has been
detected on the input signal, taking account of
noise.
ENABLE: check to enable this test.
VALUE: select an image quality to be used as a
reference in determining whether the current image
is frozen. Choices are Noisy, Normal and HiQ.
Black Detection: Detects whether a sequence of
video frames contains only black on the input
signal.
ENABLE: check to enable this test.
THRESHOLD: set the level (in IRE or mV) below
which this condition will be flagged
CC Validity: Detects the validity of Closed
Captioning (CC) information in the VBI of the input
video signal.
ENABLE: check to enable this test
IMMEDIATE PRESENCE STATUS: shows the
current status of CC; green for present, and red for
absent.
ALARM CONFIG: use the slider to set the Error
Duration; the period during which CC must be
continuously absent before the CC Presence error
will be flagged