Time Base Menu; Scale; Position - HP 54710A User's Reference Manual

Time Base Menu

Scale

Scale
Scale changes the sweep speed from 100 ps/div to 20 s/div. You can change
the sweep speed with the knob, keypad, or arrow keys. The knob and arrow
keys operate in two modes. One mode is a 1-2-5 step sequence, while the
other mode is a fine mode that allows smaller incremental changes. The
keypad allows you to enter more precise values than are possible with either
the knob or arrow keys.
When the oscilloscope is stopped, and you expand the scale, the oscilloscope
redisplays the signal at the new scale setting. This feature allows you to
zoom in or to zoom out on the signal. If you watch the memory bar at the top
of the display, you can see what portion of memory you are zooming on.

Position

Position moves the sweep horizontally. When position is set to zero, the
trigger point corresponds to the reference point. The position range depends
on the scale selection and reference selection.
Positive position values indicate time after the trigger point (posttrigger),
and negative position values indicate time before the trigger point
(pretrigger). Viewing pretrigger information is a beneficial feature because
you can see the events that led up to the trigger point.
When the oscilloscope is stopped, position allows you to pan across a signal.
If you watch the memory bar at the top of the display, you can see what
portion of memory you are panning across.
See Also Chapter 16, "Specifications and Characteristics" for the position range.
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