Setting The Audio Mono Threshold Level; Setting The Audio Mono Duration; Detecting Loss Of Primary Captioning; Detecting Loss Of Program Rating Duration - evertz 7700 Manual

7.7.7.1. Setting the Audio Mono Threshold Level

Fault definitions
Mono threshold level
0.2 to 0.5 in 0.01
increments
0.2

7.7.7.2. Setting the Audio Mono Duration

Fault definitions
Mono duration
0.5 to 127 sec
10 sec

7.7.8. Detecting Loss of Primary Captioning

Fault definitions
Loss of CC duration
2 to 512 sec in 2 sec
increments
180 sec

7.7.9. Detecting Loss of Program Rating Duration

Fault definitions
Loss of PR duration
1 to 255 sec
30 sec

7.7.10. Detecting Picture Freeze

The Picture noise level and Picture freeze duration controls are used to detect when a video picture is
considered to be frozen. The Picture noise level control sets the threshold that determines whether
activity in the picture is considered to be noise. The picture activity must be greater than this amount for
the duration set by the Picture freeze duration control before the fault condition exists.

7.7.10.1. Setting the Picture Noise Level

Fault definitions
Picture noise level
1 to 10
9
7735AVC-LB Video Composite Encoder and Audio DAC with SoftSwitch
This control sets the level of L/R audio difference under which is
considered mono.
0 corresponds to both channels being identical while 1 corresponds to
both channels being exactly out of phase.
This control sets the duration of mono audio in seconds, which is
considered a fault.
This control sets the amount of time in seconds with no primary CC1
captions encoded, which is considered a fault.
This fault condition will also be generated if the closed caption signal is
missing on the input video.
This control sets the amount of time in seconds with no program rating
packet encoded in the Line 21 XDS data stream, which is considered a
fault.
This fault condition will also be generated if the closed caption signal is
missing on the input video.
This control sets the approximate level of noise expected in the video
signal feed. It is used by the freeze detect feature to distinguish motion
from background noise on top of a video feed.
As a guide, here are some signal to noise ratio comparisons:
1 = digital freeze (no noise on top of frozen picture)
10 = 40 dB SNR
Revision 1.6
7700 MultiFrame Manual
7735AVC-LB - 31