User’s Manual MSO/UPO2000 Seri es
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6.1 Horizontal Scale
Horizontal scale which is horizontal time base, the amount of time represented by each scale on the
horizontal direction of the screen, usually expressed as s/div. Rotate the SCALE knob in the HORIZONTAL
control area to set the horizontal scale according to 1-2-5 order, that is 1 ns/div, 2 ns/div, 5ns/div, 10 ns/div,
20 ns/div... 500 s/div, 1 ks/div. Turn clockwise to decrease the scale, turn counterclockwise to increase the
scale. When adjusting the horizontal time base, the scale information will appear in the upper left corner of
the screen (as shown in Figure 6-1), it changes in real time.
Figure 6-1
When the time base is changing, waveform will be change with trigger point to extended or compressed
accordingly.
6.2 ROLL Mode
When trigger mode is in auto state, rotate SCALE knob in the HORIZONTAL control area, the oscilloscope will
enter ROLL mode when horizontal scale slow to 20 ms/div.
The oscilloscope will continuously draw a voltage-time trend of the waveform on the screen. In this mode,
the waveform is scrolled from right to left to refresh the display, and the latest waveform is drawn at the far
right end of the screen. The diagram as shown in Figure 6-2.
