5.7 Setting Environment Conditions
122
Filter OFF Sampling is performed or a trigger is applied at a rise of a pulse or fall of a pulse
of 1 ms or more at the HIGH level and 2 μs or more at the LOW level.
Filter ON Sampling is performed or a trigger is applied at a rise of a pulse or fall of a pulse
of 2.5 ms or more at the HIGH level and 2.5 ms or more at the LOW level. It is
possible to reduce erroneous operation caused by chattering.
Input a pulse of 50 ms or more at the LOW level.
Functions of External Control Input Terminals
Terminal Explanations Accept Condition
SMPL/TRIG This terminal is for controlling the external sampling operation or external
trigger operation. If the measurement function is set to "External Sampling,"
the external trigger function cannot be used.
Edge
START This terminal is for controlling the start operation from an external device.
Shorting this terminal and the GND terminal performs the same operation
as pressing of the instrument.
Level
STOP This terminal is for controlling the stop operation from an external device.
Shorting this terminal and the GND terminal performs the same operation
as pressing of the instrument.
Level
GND This is the GND terminal. It is common to the internal GND of the instru-
ment.
-
Signal Input Condition of SMPL/TRIG Terminal
HIGH: 2.5 to 5.0 V
LOW: 0 to 1.0 V
2 μs or more
1 ms or more
Sampling or trigger at either rise or fall
(depending on the detection edge setting)
2.5 ms or more
4 ms or more
HIGH: 2.5 to 5.0 V
LOW: 0 to 1.0 V
Sampling or trigger at either rise or fall
(depending on the detection edge setting)
• Each type of control will not be accepted if the input signal does not satisfy the
condition above.
• A signal with an interval shorter than the maximum response speed for exter-
nal sampling is ignored. (p. 81)
Signal Input Condition of START/STOP Terminal
50 ms or more
HIGH: 2.5 to 5.0 V
LOW: 0 to 1.0 V
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