Viavi CAA06M, User Manual

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19
Performing Calibration
Introduction
This chapter provides instructions on how to perform calibration properly in order to obtain accurate
measurement results. Topics discussed in this chapter are as follows:
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Understanding calibration
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Performing 1-port calibration
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Performing 2-port calibration
Understanding calibration
Calibration of your instrument to the Open, Short, and Load standards is important to get reliable and
accurate measurement results. After setting frequencies and right before making a measurement, you
need to perform an O-S-L calibration using a mechanical or electronic calibration kit
Calibration tools
You need to have the following calibration tools to be able to perform a calibration. This instrument
detects the connected calibration kit and displays a different on-screen instruction for it.
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Mechanical Y-Cal kit or electronic EZ-Cal kit
Note . In case of calibration with Ez-Cal, there is no Cal Off (T)
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Extension cable(s) if necessary
Performing 1-port Calibration
Measurement modes that need the 1-port calibration are Reflection, DTF, 1 Port Cable Loss, 1 Port
Phase and Smith Chart.
It is recommended that you perform an O-S-L calibration right at the RF Out / Reflection port of the
instrument without using an extension cable in order to minimize a measurement error. If using an
extension cable is inevitable, you need to use a phase stable cable and perform the O-S-L calibration at
the end of the extension cable.
O-S-L calibration using mechanical Y-Cal kit