Agilent Technologies 4156b, User Manual

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2-30 Agilent 4155B/4156B User’s Guide Vol.2, Edition 5
Measurement Mode
Sampling Measurement Mode
Logarithmic Sampling Measurement
Logarithmic sampling mode plots the measurement data on the X-axis (@TIME) set
to the logarithmic scale by doing the following operation. See Figure 2-7.
1. Forces constant current, constant voltage, or pulsed constant bias.
2. Waits hold time.
3. Triggers one point measurement.
4. Measurement unit executes measurement. Measurement result data is stored in
memory.
5. Triggers one point measurement. Interval of trigger is constant (setting value of
INITIAL INTERVAL).
6. Measurement unit executes measurement if it is ready to measure. Measurement
result data is stored in memory.
Measurement unit waits next trigger if it is busy or in measurement.
7. Repeats steps 5 and 6 until that a sampling completion condition is satisfied.
Logarithmic sampling mode retains only the measurement data that can plot the
data on the logarithmic X-axis in almost the same interval.
Figure 2-7 Example Operation of Logarithmic Sampling
TIME
Hold Time
Discard
Sampling Interval
Starts
Sampling
Data of first decade
Measurement
Data of second decade
@TIME
This is the example
to plot LOG10 data.
Second decade First decade
1/10 decade
1
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3
4
5
6
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