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Measuring Components or Circuits
Automatic measurement
If you have many objects or points to be measured, “automatic measurement” is useful. The
function performs measurement by automatically switching objects, measurement xtures, or
measurement terminals to be measured.
For automatic measurement, the switch timing must be aligned with the instrument operation.
The following are the 2 methods to align the timing.
When switching objects to be
measured according to the INDEX
signal output from Pin 29 of the
instrument’s EXT I/O terminal
• Set the trigger mode of the instrument to Internal trigger mode
or External trigger mode.
Internal trigger mode
• When the START key is pressed, measurement starts.
External trigger mode
• After the START key is pressed, when a manual trigger is input,
measurement starts.
When a trigger pulse is input to
Pin 1 of the EXT I/O terminal of the
instrument at the timing of switching
the objects to be measured
• Set the trigger mode of the instrument to External trigger mode.
• After the START key is pressed, when a trigger pulse is input to
Pin 1 of the instrument’s EXT I/O terminal, measurement starts.
• The conditions of the external trigger signal are as follows:
• Pulse width: 100 µs or greater
• Drive output: Open collector or TTL output
• Drive current: 1 mA or higher sink current
For details, see the following pages:
Trigger mode: “4.5 Changing Measurement Starting Conditions (Trigger Function)”
(p. 58)
EXT I/O terminal: “9 External Control (EXT I/O)” (p. 109)
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