Table 5.25 External Trigger Parameter Setting
Parameter Description
Edge
Sets the trigger edge type. The available
edges are Rise, Fall, HighLevel, and
LowLevel. By default, it is Rise. When no
external signal is available, it triggers
only when HighLevel is selected. When
an external signal is available, use the
external trigger with a specified edge to
make a measurement.
Output
Sets whether to output the pulse signal
after sampling. By default, it is OFF.
When enabled, the pulse signal is output
via the rear-panel VM COMP interface.
You can set the polarity and width of the
pulse signal.
Pulse Polarity
Sets the polarity of the output pulse
signal after sampling.
Pulse Width
Sets the pulse width of the output pulse
signal. The range of the pulse width is
different under different measurement
speed.
Fast: The default pulse width in fast
speed is 2 ms. For DM858, its range is
from 1 ms to 7 ms. For DM858E, its
range is from 1 ms to 11 ms.
Medium: The defalut pulse width in
medium speed is 10 ms. Its range is from
1 ms to 49 ms.
Slow: The default pulse width in slow
speed is 100 ms. The range of the pulse
width for the Frequency/Period
measurement is from 1 ms to 1,599ms.
The range of the pulse width for other
measurements is from 1 ms to 399 ms.
Front Panel Operation
DM858 Series User Guide
98
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
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