HP 1660CS-Series User Manual page 208

The Scope Marker Menu
Manual time markers options
When you select the Trig to X field and turn the knob, the Tx marker will
move across the display. As you move the marker, the time value in the Trig
to X field changes. A negative time value indicates the marker is placed
before the trigger point, and a positive time value indicates the marker is
placed after the trigger point. The Trig to O field works similarly.
As you turn the knob when either the Trig to X or Trig to O field is selected,
the time value in the Tx to To field also changes, showing the time difference
between the Tx and To markers. If the time displayed in the Tx to To field is
negative, the To marker is to the left of the Tx marker.
When you select the Tx to To field and turn the knob, the Tx and To markers
will move in unison and maintain the preset Tx to To time value.
You can also change the Tx to To, Trig to X, and Trig to O fields with the
pop-up keypad. Refer to the earlier paragraph entitled "Tx to To Field" for a
description and results of keypad entries in the Tx to To field.
T Marker value display
Any time the markers (either voltage or time) are turned on, the current
marker settings may be displayed on the channel, trigger, display and
auto-measure menus by using the Display Options field located to the right of
the time base Delay field. The Display Options field provides a pop-up menu
that allows you to either select to set channel labels or to view the Sample
Period display or the Marker Value display.
The Marker Value display consists of two blocks. One contains settings for
the voltage markers, the second contains settings for the time markers. If
only one set of markers is turned on, only one of the two blocks will appear
on the screen.
On the marker menu, if time markers are turned off, the Sample Period
display will appear on the marker menu. If time markers are selected as
either On or Auto, the Sample Period display is not visible on the Marker
menu.
The Display Options field never appears on the Marker menu.
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