Anritsu Site Master S331L - Page 178

7-4 PN: 10580-00321 Rev. M S331L UG
7-2 Calibration Methods Calibration
While OSL Cal tee, InstaCal, or Tranmission (Ext. Sensor) provide
alternatives for the tools needed to perform the calibration, Standard
Cal or Flex Cal determines the calibration frequency range. The default
standard calibration is for a selected frequency range, and is no longer
valid if the frequency is changed. Flex Cal is a broadband frequency
calibration that remains valid if the frequency is changed.
Flex Cal calibrates the instrument over the entire frequency range and
interpolates data points if the frequency range is changed. This method
saves time as it does not require the user to re-calibrate the system for
frequency changes. The trade-off is that the accuracy is not the same
(fewer data points) as it would be with the standard calibration. If the
frequency range will not be changed often, standard calibration is
recommended for troubleshooting purposes. Table 7-1 has a summary
comparing the OSL and InstaCal methods for both Standard and Flex
Cal settings.
Table 7-1. Summary of Calibration Methods and Tools
Calibration Type
Calibration Tool
External OSL
(Tee or Separate
Components) Internal InstaCal
Standard Cal
(recalibrate every
time frequency is
changed)
Most Accurate Cal
Method/ Need to
recalibrate if frequency
changes.
This will provide the best
accuracy.
Recommended for
reporting.
Fastest Calibration
Method.
Need to recalibrate if
frequency changes.
Fast cal method.
Recommended for
reporting.
Flex Cal
(no need to
recalibrate when
frequency is
changed)
Most accurate cal method.
No need to recalibrate if
frequency changes.
Recommended for
troubleshooting.
Fastest Cal Method /
No need to re-calibrate if
frequency changes.
This is the fastest and
most convenient
combination.
Recommended for
troubleshooting.