Agilent Technologies EasyEXPERT Guide de l'utilisateur Page 137

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Agilent EasyEXPERT Users Guide Vol. 2, Edition 1 9-11
If You Have a Problem
When You Perform Measurement
Unexpected Sampling Measurement Data is Returned
If sampling 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 A. For measurement
ranges 10 A or less, measurement takes longer than the specified integration
time.
Do not perform analysis operation during measurement state.
MFCMU Causes Unbalance Condition
Extending measurement cables may cause the unbalance condition of the MFCMU.
To solve this problem:
Perform the phase compensation. See “CMU Calibration” in “Calibration”,
Chapter 1, User’s Guide Vol. 1.
The signal path from MFCMU to DUT must be as short as possible.
Reduce stray capacitance and guard capacitance on the signal line.
Do not connect the Low (Lcur, Lpot) terminal to the wafer chuck. If the
MFCMU must be connected to the wafer chuck, use the High (Hcur, Hpot)
terminal to connect to the wafer chuck.
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