Quantum Data 881 User Manual page 499

882 Video Test Instrument User Guide (Rev A.35)
8. Enable or disable the visibility setting by pressing the soft key adjacent to the Visible
item on the display. A + indicates visibility is enabled; a - indicates it is disabled.
Enabling the visibility setting will allow you to see the pulse position on a monitor.
To position the probe pulse in a specific location in the video signal:
1. Press the Tools key. The following menu appears on the generator's display:
System
Sequence
Probe
AFC
2. Choose the Pulse item by pressing the adjacent soft key. The current probe settings
appear on the generator's display as shown below:
Left P:0000
Right X:0000
Up L:0000
Down Y:0000
3. Select the travel sensitivity of the positioning keys by pressing the soft key adjacent to
the desired setting. Refer to the table below.
Setting Sensitivity
EXP exponential increase/decrease when +/- keys are pressed
1 increase/decrease by 1 line or pixel when +/- keys are pressed
10 increase/decrease by 10 lines or pixels when +/- keys are pressed
100 increase/decrease by 100 lines or pixels when +/- keys are pressed
4. Set the horizontal position of the probe pulse by pressing the soft key adjacent to the
Left or Right item on the generator's display.
The horizontal position of the probe is simultaneously displayed in two different ways:
• The horizontal position P:nnnn is given in pixels relative to the leading edge of the
horizontal sync.
• If the leading edge of the probe is within the active portion of a line, an alternate
horizontal position X:nnnn is also displayed, indicating the number of pixels
between the start of active video (X:0) and the leading edge of the probe pulse in
the horizontal direction.
5. Set the vertical position of the probe pulse by pressing the soft key adjacent to the Up
or Down item on the generator's display.
The vertical position of the probe is simultaneously displayed in two different ways:
• The vertical position L:nnnn is given in whole scan lines relative to the leading edge
of blanking of the frame or first field.
Probe
Exp
1
10
100
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