Agilent Technologies 2000 X, Руководство пользователя

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52 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
2
Horizontal Controls
Negative delay values indicate you're looking at a portion of the waveform
before the trigger event, and positive values indicate you're looking at the
waveform after the trigger event.
To change the time/div of the normal window, turn off Zoom; then, turn
the horizontal scale (sweep speed) knob.
For information about using zoom mode for measurements, refer to "To
isolate a pulse for Top measurement" on page 175 and "To isolate an event
for frequency measurement" on page 182.
To change the horizontal scale knob's coarse/fine adjustment setting
1 Push the horizontal scale knob (or press [Horiz] > Fine ) to toggle between
fine and coarse adjustment of the horizontal scale.
When
Fine
is enabled, turning the horizontal scale knob changes the
time/div (displayed in the status line at the top of the display) in smaller
increments. The time/div remains fully calibrated when
Fine is on.
When
Fine
is turned off, the Horizontal scale knob changes the time/div
setting in a 1- 2- 5 step sequence.
To position the time reference (left, center, right)
Time reference is the reference point on the display for delay time
(horizontal position).
1 Press [Horiz] .
2
In the Horizontal Menu, press
Time Ref
; then, select:
•
Left
— the time reference is set to one major division from the left
edge of the display.
• Center — the time reference is set to the center of the display.
• Right — the time reference is set to one major division from the right
edge of the display.
A small hollow triangle (
∇
) at the top of the display grid marks the
position of the time reference. When delay time is set to zero, the trigger
point indicator (
▼
) overlays the time reference indicator.