Programming

 

 

 

 

 

 

 

Capacitance Compensation

Table 4-10

Compensation Coefficients and Modifications

 

 

 

 

 

 

 

 

 

 

 

 

Compensation

 

 

Modifications of data file

 

 

coefficients

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2H

 

For the Agilent B2220A probe card interface, do not modify

 

 

C2L

 

the lines.

 

 

 

 

 

 

For the connector plate, change the R, L, C values in the lines.

 

 

 

 

 

 

 

 

The value must be changed to the R, L, C values of the C2x

 

 

 

 

path (triaxial cable with connector plate) shown in Figure 4-6.

 

 

 

 

 

 

 

 

 

 

C3H

 

Change the R, L, C values in the lines. The value must be

 

 

C3L

 

changed to the R, L, C values of the C3x path.

 

 

 

 

For the Agilent B2220A probe card interface, probe card will

 

 

 

 

 

 

 

 

be used for the C3x path.

 

 

 

 

 

 

 

For the connector plate, coaxial cable with positioner will be

 

 

 

 

used for the C3x path.

 

 

 

 

 

 

 

 

 

 

 

2. Measure the R, L, C values of the C2x or C3x path by using the Agilent 4284A.

 

 

See “To obtain compensation coefficients” on page 4-26.

 

 

 

After the measurements, calculate the per meter value of the R, L, C, and record

 

 

them into the following table.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compensation

 

 

Explanation

 

 

 

 

 

 

 

 

 

 

coefficients

 

R ()

 

L (H)

 

C (F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C3H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C3L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.Open the template file selected at step 1 by using a text editor. Exchange the R, L, C values of C2x/C3x with the values recorded at step 2. And save the file as your compensation data file (e.g. C:\temp\my_env_1.txt).

Do not change any other lines. Also do not change the value for the coefficients that should not be modified.

Agilent B2200 User’s Guide, Edition 2

4-25

Page 123
Image 123
Agilent Technologies B2201A, B2200A manual C2L, Compensation Explanation Coefficients