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Now select Load and the reference waveform will be displayed.
4) Trigger
You can drag the trigger marker to adjust the trigger level. The active trigger level will be
displayed in the top right corner.
a) Mode
Select trigger mode.
i. Edge
Sets the trigger mode to Edge trigger
b) Sweep
Select sweep mode.
i. Auto
Auto mode causes the oscilloscope to sweep, even without a trigger. If no
signal is present, a timer in the oscilloscope triggers the sweep. This
ensures that the display will not disappear if the signal drops to small
voltages. It is also the best mode to use if you are looking at many signals
and do not want to bother setting the trigger each time.
ii. Normal
In normal mode the oscilloscope only sweeps if the input signal reaches
the set trigger point. Otherwise on a digital oscilloscope it is frozen on the
last acquired waveform. Normal mode can be disorienting since you may
not see the signal at first if the level control is not adjusted correctly.
Hence in normal mode, when trigger events are missing there is no new
trace drawn or redrawn.
iii. Single
In one shot mode, the scan starts only once at first trigger event. After
that, it must be manually restarted by using Acquire Start for another start
event. So in single mode a trace is drawn just once at first trigger event
and the length of scan time depends on time base setting.
c) Source
Select the trigger source, CH1, CH2, Math or Reference.
d) Slope
Select on which part of waveform to trigger, leading edge or trailing edge, aka Rise
or Fall.
5) Horizontal
Select Time/Division to display the waveform. The time base ranges of the oscilloscope are
listed further on. The horizontal scan speed is from 4ns/div to 1 hour/div.
The horizontal scale of the oscilloscope is used to take time measurements. These time
measurements include measuring the period, pulse width, and timing of pulses. Once you
know the period, and as frequency is the reciprocal of the period, the frequency is one
divided by this period (f=1/Sec). Like voltage measurements, time measurements are more
accurate when you adjust the portion of the signal to be measured to cover a large area of
the screen. Taking time measurements along the center horizontal graticule line, which has
smaller divisions, makes for more accurate time measurements or by using the cursors.
a) Time/Div
Time/Division ranges.
i.
nS
ii.
uS
V1.0b19 2014/12/21
OPEN6022BE User Manual
Page: 26