If You Get Unexpected Data When Performing Sampling Measurement - Agilent Technologies 4156b User Manual

Precision semiconductor parameter analyzer
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If You Have A Problem
When You Make A Measurement
If You Get Unexpected Data when Performing Sampling
Measurement
If initial interval is set to a short time and if FILTER ON is set, you may get
unwanted data. FILTER ON causes a slower rise time, so short initial interval will
sample during this rise time.
To solve this problem:
Set FILTER field to OFF if you set initial interval to a short time.
Some data may be skipped because measurement takes a long time. Measurement
takes a long time if measurement is performed in a low current range, if many
measurement channels are set up, or if analysis, such as moving a marker, is
performed during measurements.
To solve this problem:
Measure current using a fixed range that is more than 10 mA. For measurement
ranges 10 mA or less, measurement takes longer than the specified integration
time.
Decrease measurement channels to reduce measurement time.
Note that the number of measurement channels automatically increases if you do
both the following: force voltage from channels that are connected to R-Box and
display the voltage values or use voltage values in user functions. The channels
automatically measure current, which is used to compensate the voltage values.
Do not perform analysis operation during measurement state
8-12
Agilent 4155B/4156B User's Guide Vol.2, Edition 5

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