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Page 32 OmniTek XR User Guide, Software Release 2.3
Crosshair Toolbar
The Crosshair toolbar provides both information about and controls for the current point
of interest within the video display (as indicated by the crosshair on the Mini-Pic display).
Position
The toolbar shows the sample number and line number that the crosshair is positioned
over. Using the mouse, you can click in the Mini-Pic to position the crosshair roughly in
the required place, then use these boxes to make fine adjustments. For interlaced forms
of video, you can switch the crosshair between Field 1 and 2 using the F1 and F2 boxes.
For progressive forms of video, however, these buttons have no meaning and are greyed
out.
The sample number box may also be used to view horizontal blanking. Select the
required horizontal magnification, then increment the sample number such that the
sample is outside of active video. The Waveform windows will scroll to show the sample
position in the blanking area. This will let you view any audio or ancillary data that may be
present, if the ‘TRS Pass’ selection is on (as described on page 17).
↑↓←→
The 'top' and 'bottom' buttons position the cursor on the top active line, or bottom active
line of the field/frame.
The 'left' and 'right' buttons position the cursor on the first or last active pixel of the current
line.
Output
The drop-down menu enables the crosshair to be set to appear either in the monitor
output, or in the serial output, or in both outputs. This duplicates options included in the
Output menu.
Cursors Toolbar
Two cursors are available to be placed in the Waveform window and moved about to take
either time measurement or amplitude measurements.
The Function drop-down menu enables you to select the type of measurement that is
required.
The Cursor 1 and Cursor 2 boxes let you control which cursor you are affecting when
you subsequently click in the Waveform window. The active cursor appears as a solid
line, whilst the other cursor becomes dotted. (The colour of these cursors is determined
by the Look and Feel menu selection in the Waveform window – see page 58.)
To move the cursors as a pair, lock the cursors together by checking the Track box.
Time values are displayed in microseconds, whilst amplitude values are shown as a
relative difference between the two cursor positions.
Please note that, when either the time measurement or the amplitude measurement
cursors are active, it is not possible to control the crosshair just by clicking a new position
in the Mini-Pic window. The cursor function box must be set back to None to regain
mouse control over the crosshair. However, it is always possible to move the crosshair by
editing the pixel and line values in the Crosshair toolbar.