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9.14 8940 F/V UNIT
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Frequency
Obtains the frequency of the input pulse corresponding to the
measured waveform.
Count
Counts the number of input pulses.
Pulse Duty Ratio
Obtains the duty ratio of the measured waveform.
Voltage
Measures the waveform voltage.
Current
Measures the waveform current.
Flashing cursor
NOTE
5V
-5 V
0V
Threshold
Threshold Settin
Exam
le
9.14 8940 F/V UNIT
The 8940 F/V UNIT can measure frequency, count, pulse duty ratio, voltage
and current on each channel (with one measurement type per channel).
See Section 9.3, "Setting the CHANNEL Screen" for the common settings.
■ Probe checking with the 9322 DIFFERENTIAL PROBE
With the 8940 F/V UNIT, scaling for the probe check
input range can be set automatically. You must set the
scaling for all other input units manually.
Move the flashing cursor to the illustrated position for the
channel you want to check, then select Probe Check from
the function key display. The scaling for voltage mode is
1/1000. The threshold values for frequency, duty ratio,
and integration mode are 100 times, and the ideal input
range for frequency mode is P50/P60. For details, refer to
the 9322 DIFFERENTIAL PROBE User*s Manual.
･ Hold and pull up settings cannot be determined from the Waveform display
or CHANNEL screen. Check through the function display that appears when
the flashing cursor is moved to the "range" item.
･ During list printing, Hold and Pull-Up on/off selections are printed. Refer to
Section 13.5, "Example of Printer Output" for details.
･ The input coupling is fixed at DC for Frequency, Count and Pulse Duty
Ratio measurement modes.
･ Measurement results may differ depending on the threshold setting. To
obtain the correct measurement, set the threshold to match the input
waveform.
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