Agilent Technologies 54622A User Manual page 114

MegaZoom Concepts and Oscilloscope Operation
To setup the Horizontal time base
To change the sweep speed for the delayed sweep window, turn the sweep speed
knob. As you turn the knob, the sweep speed is highlighted in the status line
above the waveform display area.
The point about which the delayed sweep window is expanded is referenced to
the delay time and is dependent on the time reference setting:
• When Time Ref is set to Left, the delayed sweep expands to the right starting
from the delay time setting (one graticule from the left side of the display
when delay time = 0).
• When Time Ref is set to Center, the delayed sweep expands equally left and
right) from the delay time setting (center of the display when delay time = 0).
• When Time Ref is set to Right, the delayed sweep expands to the left starting
from the delay time setting (one graticule from the right side of the display
when delay time = 0).
The time reference position sets the initial position of the trigger event within
acquisition memory and on the display, with delay set to 0. The delay setting
sets the specific location of the trigger event with respect to the time reference
position. The time reference setting affects the delayed sweep as described in
the following ways.
When the horizontal mode is set to Main, the delay positions the main sweep
relative to the trigger. This delay is a fixed number. Changing this delay value
does not affect the sampling interval or sweep speed. When the horizontal mode
is set to Delayed, the delay controls the position of the delayed sweep window
inside the main sweep display. This delayed delay value is independent of
sampling interval and sweep speed.
To change the sweep speed for the main sweep window, press the Main softkey,
then turn the sweep speed knob.
For information about using delayed mode for measurements, refer to the
"Making Measurements" chapter.
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