Atec Agilent-16047A - Manual (Page 101)

4. Cable Length Compensation
When the test sample is measured with an instrument having a Four-Terminal Pair configuration,
the additional length of the test-lead extension between the instrument and the test sample, in con-
junction with the measurement frequency, influences the amplitude and phase of the signal being
measured. This must be taken into account, particularly for measurements performed at frequencies
of 100 kHz or higher, since the modification of the amplitude and phase of the signal can cause the
internal measurement circuit to malfunction or create an unexpected measurement error. Such cir-
cuit malfunctions and measurement errors can be avoided with cable length compensation. Cable
length compensation should therefore be performed prior to the open/short compensation.
When the following measurement instruments and test leads are used in combination, the undesired
effects described above can be eliminated by performing the cable length compensation (the values in
the table represent cable length settings):
–: N/A
1 : Available for 4284A with Option 006.
Measurement Repeatability
Dirty electrodes on the test fixture cause an increase in the contact resistance. This increase in resis-
tance can cause poor measurement repeatability. To maintain clean test electrodes on the test fixtures,
use the recommended cleaning kit (P/N 8830-0002).
96
Appendix Compensation
Model 16048A 16048B 16048D 16048E 16048G 16048H
4192A 1 m 1 m – – – –
4194A 1 m 1 m – – – –
4263A/B 1 m 1 m 2 m 4m – –
4268A 1 m 1 m 2 m – – –
4278A 1 m 1 m 2 m – – –
4279A 1 m 1 m 2 m – – –
4284A 1 m 1 m 2 m 1 4 m 1 – –
4285A 1 m – 2 m – – –
4288A 1 m 1 m 2 m – – –
4294A – – – – 1 m 2 m