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1-10
IM 704210-01E
Sample Size (Number of Events)
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For operating procedure, refer to 6.2
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The allowable number of measured data items to be acquired into the acquisition memory is
called sample size. This setting is required if event gate is selected. Up to 32,000 events (16,000
events for duty ratio/phase difference measurement) can be set in the case of time stamp mode
and up to 99,999,999 events can be set in the case of hardware histogram mode.
Sampling Interval
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For operating procedure, refer to 6.2
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The sampling interval is the interval at which a sample is acquired. A sampling pulse (see
“Measurement Block”) is generated at sampling intervals, and measurement is carried out when
the input signal satisfies the trigger conditions (trigger level, slope etc.) after the sampling pulse.
The sampling interval can be set between approximately 71 ns (reciprocal of the maximum
sampling rate 14 MS/s) and 4 ms in the case of time stamp mode. For hardware histogram mode,
the sampling interval is fixed at approximately 71 ns.
Arming
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For operating procedure, refer to 6.3
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Measurement of a measurement block is started when arming is activated. Two arming methods
are available: auto arming in which measurement starts immediately when the START key is
pressed or START communication command is issued, and external arming in which
measurement starts when the external arming signal is input.
Auto arming
Arming is activated automatically after the START key is pressed or START communication
command is issued. For auto arming, the internal arming signal is used.
External arming
Arming is activated when the external arming signal is input to the EXT ARM IN terminal
following start of measurement. It is possible to select whether to activate arming using the rising
or falling edge of the external arming signal.
Measurement
block
Arming
Start of measurement
Arming Delay
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For operating procedure, refer to 6.3
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With the external arming method, it is possible to delay measurement until a certain time elapses
or the specified number of events occur following activation of arming. The following two
arming delay methods are available.
Time delay
Measurement starts after the specified time (up to 1 second) has elapsed.
Event delay
Measurement starts after the specified number of events (up to 30,000) have occurred.
1.5 Setting the Acquisition Conditions for Input Signal to be Measured