Performing 1-Port Calibration; O-S-L Calibration Using Mechanical Y-Cal Kit - JDS Uniphase CellAdvisor JD720C Series User Manual

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

The O-S-L calibration must be performed after setting frequencies and connecting an
extension cable. Figure 6 illustrates a connection setup with using the port extension cable.
Figure 6
Procedure
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2
3
4
NOTE
If the O-S-L calibration is done at the end of the port extension cable for DTF
measurement, the length of the port extension cable is compensated automatically and is
not included in the distance to the point of discontinuity.
Do not use an unnecessary extension cable or adapter in order to prevent a measurement
error. Bending or moving the extension cable while making a measurement may cause
errors in the measurement.
Mechanical calibration connection diagram with an extension cable
JD723C/724C
Connect an extension cable, if necessary, to the RF Out / Reflection port of the instrument.
Connect the OPEN standard of the calibration kit to the instrument's the RF Out / Reflection port
or to the extension cable if used.
Press the CAL hard key.
The on-screen instruction appears to guide you through the mechanical O-S-L calibration.
Do the following depending on your instrument model and its installed option:
CellAdvisor JD720C Series User's Manual
Chapter 4 Performing Calibration
JD725C/726C
35