Agilent Technologies 16048A Specifications download pdf (Page 93)

Error Compensation

Agilent measurement instruments incorporate one of the following four types of error compensation

functions to eliminate residual impedance effects in test fixtures:

1. Open/short Compensation

For a simple measurement system, represented by the equivalent circuit model shown below, resid-

ual impedance values Rs and Ls and admittance values Co and Go can be corrected by:

(i) Measuring open condition for the test fixture’s admittance.

(ii) Measuring short condition for the test fixture’s impedance

(iii)Measuring the test sample, then subtracting the

admittance and impedance.

The above procedure is performed internally by the

open/short compensation.

When the test fixture is directly connected to the mea-

surement instrument, the open/short compensation suf-

ficiently corrects the measurement error.

2. Open/short/load Compensation

When the measurement system is too complicated to be represented as the above equivalent circuit

model, the open/short compensation cannot completely compensate for the residual impedance. In

this case, the open/short/load compensation is used rather than the open/short compensation.

The open/short/load compensation is particularly effective when, for example, the 16065A is used

with the measurement instrument.

The following table lists measurement instruments and available compensation functions.

–: N/A

●: Available

*: denotes the instrument is obsolete.

Note: For more details of the compensation functions, refer to the instruction manuals supplied with

the measurement instrument.

Appendix Compensation

Test Fixture

Instrument

DUT

Model

Open Short Load

Load’s input parameters

compensation compensation compensation

4263B ●●●Z-Q, R-X, Cp-D, Cp-Q, Cp-G, Cp-Rp,

Cs-D, Cs-Q, Cs-Rs, Ls-D, Ls-Q, Ls-Rs

4268A ●●●Cp-D, Cp-Q, Cp-G, Cp-Rp, Cs-D,

Cs-Q, Cs-Rs

4279A* ●●●Cp-D, Cp-G

4284A* ●●●same as measurement parameters

4285A ●●●same as measurement parameters

4287A ●● ––

4288A ●●●Cp-D, Cp-Q, Cp-G, Cp-Rp, Cs-Q,

Cs-Rs

4291B* ●●●Rs-Ls

4294A ●●●Rs-Ls

4338B – ● ––

4339B ● –– –

4349B ● –– –

E4980A ●●●same as measurement parameters

E4981A ●●●Cp-D, Cp-Q, Cp-G, Cp-Rp, Cs-D,

Cs-Q, Cs-Rs

E4991A ●● ––

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 103 104

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Agilent Technologies 16048A Specifications Page 93

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