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WFM700 Series Waveform Monitors User Manual
3-31
Filtering. Two filters allow you to accept overshoot that would otherwise be
reported as a gamut error. Overshoot occurs due to the unequal rise time of the
chroma and luma inherent in the YPbPr signal.
Use the Horizontal filter setting to monitor for out-of-gamut errors within a
single horizontal line using a low-pass filter (SD: < 1 MHz, HD: < 1.2 MHz).
Use the Horizontal + Vertical filter setting to monitor for out-of-gamut errors on
three consecutive horizontal lines, with a weighting of 25% for the first and third
lines and 50% for the second line. Use this setting to accept horizontal artifacts,
making the detection symmetrical in the picture domain.
Area Masking. This feature lets you set the percentage of the total image pixels
(up to 10%) that can be outside the current gamut limits, yet not be reported as a
gamut error. The Area setting does not affect bright-up in the Picture display.
Line Select Mode
Use Line Select mode to select one line of the video signal to display and
measure. Line Select stays active as you change between major modes. This
enables you to select a line in Picture mode, and then go to other modes to view
the same line.
The selected line is highlighted in Picture mode and in the thumbnail picture.
The external picture monitor signals also contain a bright-up if enabled in the
Video Inputs/Outputs submenu of the Configure menu.
NOTE. Line Select mode is automatically disabled when Field sweep is selected.
Line Select mode is always enabled in Data mode.
The Field and Next Field soft keys select the field from which the selected
line/sample is taken. Select All Fields to display the same line number from all
fields in a frame. The 1 of 2 selection lets you choose a line from only one field
in a frame. Touch the Next Field soft key repeatedly to cycle through the fields
in a frame.
Sample Select determines what portion of the video line is viewed in Data
Display mode (WFM700M only). Sample Select is also active in Picture and
thumbnail modes to allow correlation of events between modes.
Field Selection
Sample Selection
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