Grass Valley DEC-1023 - Manual (Page 19)

GUIDE TO INSTALLATION AND OPERATION
DEC-1023 | 15
CONNECTION sub-tab:
ENABLE: OFF, VIDEO: enables thumbnail streaming or turns streaming OFF
SIZE: SMALL, MEDIUM, LARGE: selects the size of the Thumbnail image.
PLAYER: OFF, THUMBNAIL: Click on the Thumbnail box to enable the thumbnail Player. A window opens in
the top section and shows a thumbnail associated with the SDI video stream that is being encoded by the
DEC-1023.
• Note: you must check the VIDEO box in the ENABLE section to see the video image.
QUALITY: Use the left-hand pulldown to select the video quality to be sent by the streaming encoder.
• The choices are Poor, Normal and HiQ (e.g. high quality).
REFRESH RATE: Use the right-hand pulldown to select the refresh rate for the transmitted thumbnails.
• The choices are Fast, 1 sec, 2 sec …, 10 sec.
Streaming Priority Control: Click the Take control from Slot [##] checkbox to force the Densité Controller for
this frame to assign more bandwidth for this card’s streaming output. Only one card in the frame can use this
feature. It has no effect unless you have selected Fast for the refresh rate. The actual slot number of this
card, as shown in the window title bar, will appear when the checkbox is ticked.
VIDEO PROBE tab:
The Video Probe tab is only available if the
probing options have been enabled via the
activation code in the options tab (p. 24).
This control panel allows the user to establish
conditions under which errors will be flagged and
reported by the video probe feature. The top error
parameter in the list is selected when you open the
view, indicated by the darker color of its name box.
To select any other parameter, click on it.
To the right of the parameter list appear all the controls necessary to configure the selected parameter.
The parameter configuration panel usually includes, from top to bottom:
Enable: a checkbox to enable the alarm associated with this parameter
Threshold: a threshold value for detection of an error. The error will be detected when the measured
parameter falls above (or below, depending on the nature of the parameter) the indicated threshold value.
The values are those of the equivalent analog signal. In most cases this is a slider with data entry box.
Below the THRESHOLD slider are found slider bars allowing the configuration of the conditions under which
a detected error is flagged and reported. These conditions are set independently for each error type:
• ERROR DURATION: the length of time during which a parameter is allowed to be out-of-tolerance
without being identified as an error. This is useful for situations such as a hard switch or patch of a
video signal where there is a discontinuity in the signal which the user has deliberately caused and
does not need to be flagged as an error. If a parameter is continuously out of tolerance for the
specified duration, then an error is considered to have been detected. However, this error will not be
Figure 3.8 Thumbnail group – Video Probe tab