Calibrations
Four types of calibrations can be performed using AutoCal:
One-Port: S
11
1-Port and S
22
1-Port are 1-port calibrations performed
on the indicated port of the VNA and are equivalent to the traditional
Open-Short-Load calibrations. Note that an S
22
1-Port calibration is not
available with the 360B.
Full 2-Port: This type is equivalent to the traditional
Open-Short-Load-Thru (OSLT) calibration.
Thru Update: This type is a new form of calibration which is used to
update an existing 12-term calibration in the VNA. This calibration
could have been performed using any method of calibration which
yields 12 terms (LRL, LRM, AutoCal, or OSLT). Due to cable
movement and aging, the calibration may have degraded over time. The
Thru Update refreshes the calibration by measuring a Thru connection
and updating the Transmission Tracking and Load Match calibration
constants.
Adapter Removal: This calibration measures the characteristics of
male-male or female-female test port cables for subsequent
measurement of non-insertable devices. An adapter is required for this
calibration. Adapter Removal requires two calibration procedures in
order to calculate the parameters and electrical length of the adapter.
NOTE: If a full frequency range calibration is not
required, modify the VNA Setup Menu to reflect only
the needed range. This will be useful when calibrating
a 40 GHz VNA below 20 GHz with a 20 GHz AutoCal
module.
Chapter 1 General Information
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