Specifications
54 Chapter 4
Preparing for Accurate Measurement
Running the Compensation Process
Calculating compensation coefficients and turning on/off compensation
function
After measuring the data for calculating the compensation coefficients, issue the following
commands to calculate the compensation coefficients and turn on the compensation
function:
When the OPEN compensation function is currently on, you can issue the
:CORR2:COLL:OPEN command by specifying “OFF” (or “0”) as the parameter to turn
off the OPEN compensation function.
Similarly, when the SHORT compensation function is currently on, you can issue the
:CORR2:COLL:SHOR command by specifying “OFF” (or “0”) as the parameter to turn
off the SHORT compensation function.
Preventing operational errors when measuring data for calculating
compensation coefficients
To retrieve each standard’s measurement data for calculating the compensation coefficients
for R
dc
measurement, use the following command:
• :DATA:RCMD{1-2}? on page 266
Since this command returns the R
dc
measurement value (without compensation) for each
of the OPEN and SHORT standards, you can check whether this value is normal to prevent
operational errors (such as connecting the wrong standard) that may arise when measuring
the data.
NOTE When you validate the R
dc
measurement results returned by the command
:DATA:RCMD{1-2}? on page 266, you should use the absolute value for the same
reasons as shown in “Preventing operational errors when measuring data for calculating
calibration coefficients” on page 40.
Measured data GPIB command
Status of compensation
function after calculation
OPEN SHORT
OPEN and SHORT
:CORR2:COLL:SAVE on page 255 On On
:CORR2:COLL:OPEN on page 254
*1
On Unchanged
:CORR2:COLL:SHOR on page 255
*1
Unchanged On
OPEN only
:CORR2:COLL:SAVE on page 255 On Off
:CORR2:COLL:OPEN on page 254
*1
On Off
:CORR2:COLL:SHOR on page 255 Not supported
SHORT only
:CORR2:COLL:SAVE on page 255 Off On
:CORR2:COLL:OPEN on page 254 Not supported
:CORR2:COLL:SHOR on page 255
*1
Off On
*1.Issue the command, which designates “ON” (or “1”) as the parameter.