Invert; Bias; Unit; Chapter 3 Horizontal System Settings - UNI-T UPO3000E Series User Manual

2.6 Invert

Press 1 invert to turn on the reverse phase. The waveform voltage value
will be inverted, and the inverted flag
Picture 2-1 Invert off

2.7 Bias

When the amplitude of the DC component in the signal is relatively large,
waveform observation could be very inconvenient. As shown in picture 2-3,
it is really hard to identify the waveform. Using the bias function and the
superposition of a -10V bias voltage can eliminate the DC component of the
waveform so the AC signal can be clearly observed, and at the same time
user can know the DC component volume. As shown in picture 2-4, press
1 PgDn bias to turn on the bias and rotate the Multipurpose knob
counterclockwise to adjust the value to -10V.
Picture 2-3 Bias off
Note: Press the Multipurpose knob to return the bias to zero.
13
will appear in the vertical status bar.
Picture 2-2 Invert on
Picture 2-4 -10V Bias on

2.8 Unit

Select the amplitude unit for the current channel. Press 1
and adjust the Multipurpose knob to select the unit of "V", "A", "W" or "U", the
default unit is V. User can also switch the channel unit by consecutively pressing
the unit key, then press the Multipurpose knob to confirm, the corresponding
unit will appear on the channel status bar.

Chapter 3 Horizontal System Settings

3.1 Horizontal Scale

Horizontal scale, also called the horizontal time base, is the time value
represented by each scale in the horizontal direction, which is usually expressed
as s/div. With the SCALE knob in the horizontal control area, user can adjust
the horizontal scale in 1-2-4 steps, i.e. 2ns/div, 4ns/div, 10ns/div, 20ns/div......
40s/div. Turn clockwise to decrease the scale and turn counterclockwise to
increase the scale, the scale information (as shown below) on the upper left
corner of the screen changes in real time.
Horizontal time base
Trigger point
When changing the horizontal time base, the waveform will expand or compress
according to the position of the trigger point.
Note: There is no 100ns/div in the horizontal time base, it is changed to 80ns/div.
PgDn unit