Uni-Trend UT4000 Series, User Manual

Page: 22 / 98

11
UNI-T
®
UT4000 User Manual
1. Use the horizontal SEC/DIV knob to change the horizontal time base setup. Turn
the horizontal SEC/DIV knob to change the SEC/DIV time base range. You will
find that the time base range in the current status column of the corresponding
channel changes accordingly. Range of horizontal scanning rate is 5ns~50s/div
(UT4102C), in steps of 1-2-5.
* Note : Minimum time base range of the UT4000 Series varies from model to
model.
2. Use the horizontal [POSITION] knob to adjust the horizontal position of the signal
in the waveform window. When the horizontal POSITION knob is turned, you can
see that the waveform moves horizontally with the knob.
3. Press [MENU] to display the ZOOM and dual time base menu. In this menu press
[F1] to activate window expansion. Then press [F1] again to quit window expansion
and return to the main window. To access dual time base setup, press [F3]. You can
also set the holdoff time with the multifunction control knob [
¯ ].
Shortcut key for resetting the trigger point shift to horizontal zero position
When trigger point has moved from the horizontal centre point considerably by way
of horizontal shift, pressing the shortcut key [SET TO ZERO] can quickly reset the
trigger point to the vertical centre point. You can also turn the knob to make
adjustments.
Definition
Trigger point
means the actual trigger point relative to the centre point of the
storage device. When it is at the horizontal centre point, it is also at the centre point
of the storage device. By turning the horizontal knob, you can move the trigger
point horizontally.
Holdoff
means the time interval until the trigger circuit is next reactivated. Turn the
multifunction control knob to set the holdoff time. By adjusting the holdoff time,
you can observe combination or complex signals more effectively.