Agilent Technologies 4395A, Manual Change

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Typical Impedance Measurement T echniques
Typical Impedance Measurement T echniques
This section describes typical impedance measurement techniques . The topics covered include:
Applying DC bias
Equivalent circuit analysis
Determining Q value using the width search function
P ort extension
Applying DC Bias
The 4395A option 001 DC source can be used to supply up to 640 V / 6100 mA of DC
voltage/current to external circuit or DUT through the DC SOURCE port on the front panel.
This section explains how to supply DC bias to the DUT on impedance measurement mode .
1. Make sure that the 4395A's DC SOURCE port is inactive . (The softkey label under 4 Source 5
should be
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DC OUT on OFF .)
2. Connect a BNC cable between the DC SOURCE port and the impedance test kit's DC
SOURCE INPUT port (see Figure 8-30).
The 4395A can apply DC voltage bias up to 640V or dc current bias up to 620 mA.
Figure 8-30. Connecting DC SOURCE to Impedance test kit
Caution
Do not attempt to perform calibration or xture compensation while the
4395A is applying DC bias . Doing so could damage the calibration or xture
compensation standard.
Analyzing the Measurement Results 8-51