USER MANUAL
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| HCO-3931
3.4.3.4 Video tab
– Freeze Detect Probe
This probe detects the presence of a signal freeze (for example, there is no change in content) for a period of time;
the error is flagged only when the time duration criterion has been satisfied.
Figure 16
Probes panel, Video Tab, Freeze Detect Probe
Property
Description
Threshold
Sets a sensitivity level for detection that will allow minor level changes due to noise, but will
detect a lack of change in the picture content. The value (in the range 0 to 15) is arbitrary, and
may need to be set by trial and error depending on the signal characteristics.
A higher threshold value will be more tolerant to video noise than a lower value and the card may
not be able to detect the freeze in presence of changing pixels. If you want to detect a pure
digital video freeze, you can use the value zero. Otherwise, the threshold should be increased
until a consistent freeze is detected.
Set Duration
(sec)
Sets the time interval over which a freeze must be continuously detected before the error is
flagged. The nominal range of durations is 1 to 90 seconds.
Clear Duration
(sec)
Sets the time interval during which an active signal must be continuously detected before a
previously-flagged Freeze error will be cleared.
See also 3.4.3 - The Probes Panel on page 26 for more information about the configuration parameters.
