Specifications

Chapter 4 39
Preparing for Accurate Measurement
Performing Calibration
4. Preparing for Accurate
Measurement
After obtaining the data for calculating the calibration coefficients for all of the OPEN,
SHORT, and LOAD standards (including the data for both impedance and R
dc
measurements), issue the following command to calculate the calibration coefficients and
turn on the calibration function:
• :CORR1:COLL:SAVE on page 246
NOTE You cannot directly turn on or off the calibration function.
Instead, the calibration function is automatically turned on when you issue the
:CORR1:COLL:SAVE command after measuring the data required for calculating the
calibration coefficients.
Also, the calibration function is automatically turned off when you reset the instrument
with the :SYST:PRES command on page 306 or the *RST command on page 206 or
when you configure the measurement point setup table with the :SOUR:LIST command
on page 294.
To check whether the calibration function is currently on or off, use the following
command:
• :CORR1? on page 231
To define the standard values with the commands described so far, follow these steps:
If you use the same standards for both impedance and R
dc
measurements or you omit
R
dc
measurement:
Step 1. Connect the OPEN standard and then issue the :CORR1:COLL command, which
designates “STAN1” as the parameter. If the trigger source is not Internal trigger, you must
trigger the instrument after issuing the command. This applies to steps 2 through 4 as well.
Step 2. Connect the S7HORT standard and then issue the :CORR1:COLL command, which
designates “STAN2” as the parameter.
Step 3. Connect the LOAD standard and then issue the :CORR1:COLL command, which
designates “STAN3” as the parameter.
Step 4. To measure a low-loss capacitor, connect the low-loss capacitor and then issue the
:CORR1:COLL or :CORR1:COLL:RF command, which designates “STAN4” as the
parameter.
Step 5. Issue the :CORR1:COLL:SAVE command.
If you use different standards for impedance and R
dc
measurements:
Step 1. Connect the OPEN standard for impedance measurement and then issue the
:CORR1:COLL or :CORR1:COLL:RF command, which designates “STAN1” as the
parameter. If the trigger source is not Internal trigger, you must trigger the instrument after
issuing the command. This applies to steps 2 through 7 as well.
Step 2. Connect the SHORT standard for impedance measurement and then issue the
:CORR1:COLL or :CORR1:COLL:RF command, which designates “STAN2” as the
parameter.
Step 3. Connect the LOAD standard for impedance measurement and then issue the
:CORR1:COLL or :CORR1:COLL:RF command, which designates “STAN3” as the
parameter.