Agilent Technologies E5071C Manual page 236

Performing 8 term Calibration using External PC
Overview
•
Procedure
•
Example
•
Other topics about Advanced Calibration
Overview
To perform 8-term error model calibration using an external PC (measuring
raw measurement data using the E5071C, calculating error term using
external PC and then performing correction with calculated error terms and
measured raw data), the procedure described in this section must be
followed. When you use this method, the measurement specification is not
satisfied.
In most cases, users do NOT need to follow the below procedure
•
as these considerations have already been performed on 8-term
error model calibration in E5071C.
When users perform 12-term error model calibration using
•
external computer such as SOLT calibration, users do NOT need
to take following procedure.
Procedure
Turning off the "System Calibration"
In its default setting, the E5071C applies "system calibration" to the
measured S-parameter data. Because the "system calibration" is applied
only to the S-parameter measurement data and NOT to the absolute value
measurement data, it interferes with 8-term error model calibration when
calculating error coefficients on external computer. You need to turn OFF
this state, all the time for calibration and measurement.
The system calibration can be turned off by executing
SCPI.SYSTem.CORRection.STATe
Once the E5071C receives this command, it will keep this
•
setting until preset. This state is saved in the state file.
Turning off the "Virtual Bridge" (3 GHz, 4.5 GHz, 6.5 GHz and 8.5 GHz option only)
There is a software conversion function called "virtual bridge" on E5071C.
The default setting of this state is ON, and this state interferes with 8-term
error model calibration when calculating error coefficients on external
computer. You need to turn OFF this state, all the time for the calibration
and the measurement.
Measurement
235