Main Differences Between 4286A And 4287A; Outline Of Differences In Calibration/Compensation - Agilent Technologies Twelfth 4287A RF LCR Operation Manual

Differences from Agilent 4286A

1. Main Differences Between 4286A and 4287A

1. Main Differences Between 4286A and 4287A
This section outlines the main differences between the 4286A and 4287A.

Outline of Differences in Calibration/Compensation

Change in concept
The concept of calibration/compensation for the 4286A is to make a calibration plane by
calibration and remove the error component from the jig section located at the tip of the
plane. However, some users found this procedure troublesome and followed it without
proper calibration/compensation. To prevent this, the calibration/compensation procedure
of the 4287A was simplified without degrading precision. The same precision as that of the
4286A is implemented by performing only OPEN/SHORT/LOAD calibration for the
4287A instead of the longer procedure for the 4286A (performing
OPEN/SHORT/LOAD/LOW LOSS CAPACITOR calibration before
OPEN/SHORT/LOAD calibration).
Changes in functions
Changes in LOAD
•
compensation
•
•
Change in USER •
and FIXED POINT
modes
Change in Rdc •
measurement
New functions •
added to the
4287A
•
CAUTION
For the 4287A calibration/compensation functions, refer to Chapter 6, "Calibration and
Compensation."
296
The 4286A is provided with LOAD compensation; the 4287A, based on the concept
described above, is not provided with LOAD compensation.
For the 4286A, only one reference value for LOAD calibration can be set for the entire
frequency range; for the 4287A, the reference value for LOAD calibration can be set
for each of the list sweep frequency points.
For the 4286A, only two parameters of Ls-Rs and Ls-Q are available for the LOAD
reference value; for the 4287A, three parameters of Ls-Rs, Ls-Q, and Cp-D are
available.
For the 4286A, two modes, USER and FIXED POINT, are available; for the 4287A,
only USER mode is available. In addition, the interpolation mode is not available with
the 4287A; therefore, calibration/compensation have to be performed again if the
frequency setting needs to be changed.
For the 4286A, the compensation data used for Rdc measurement is obtained at the
same time the data for ordinary calibration/compensation is obtained; for the 4287A,
the compensation data for Rdc measurement can be obtained separately.
The Calibration Wizard function, not available with the 4286A, is available with the
4287A.
The 4286A is not provided with a function that checks whether
calibration/compensation has been completed correctly; for the 4287A, this
determination can be made by checking the DCR measured value, provided that the
Calibration Wizard is active.
Appendix B