Horizontal Control
TDS 620A, 640A, & 644A User Manual
At the top of the display, the

Record View

shows the size and location of the
waveform record and the location of the trigger relative to the display (see
Figure 3-38). The

Time Base readout

at the lower right of the display shows
the time/division settings and the time base (main or delayed) being referred
to (see Figure 3-38).
Record View Readout
Time Base Readout
Figure 3-38: Record View and Time Base Readouts
The Horizontal menu lets you select either a main or delayed view of the time
base for acquisitions. It also lets you set the record length, set the trigger
position, and change the position or scale.

Main and Delayed Time Base

To select between the Main and Delayed views of the time base:
Press HORIZONTAL MENU ➞ Time Base (main) ➞ Main Only, Intensified,
or Delayed Only (side).
By pressing Intensified, you display a colored or intensified zone that shows
where the delayed trigger record length could occur relative to the main
trigger. The start of the zone corresponds to the possible start point of the
delayed trigger. The end of the zone corresponds to the end of the delayed
view of the time base.
Horizontal ReadoutsHorizontal Menu