Each adapter is specified as a single delay/thru standard and up to seven standards numbers can be specified into the adapter class.
Standard Class labels
Standard Class labels are entered to facilitate menu-driven calibration. A label can be any user- selected term which best describes the device or class of devices that the operator should connect. Predefined labels exist for each class. These labels are
S11A, S11B, S11C, S22A, S22B, S22C, FWD TRANS, FWD MATCH, REV TRANS, REV MATCH, RESPONSE, FWD ISOLATION, REV ISOLATION, THRU, REFLECT, LINE, and ADAPTER.
The class labels for the WR-62 waveguide calibra- tion kit are as follows; S11A and S22A–PSHORT1; S11B and S22B–PSHORT2; S11C and S22C–PLOAD; FWD TRANS, FWD MATCH, REV TRANS and REV MATCH–PTHRU; and RESPONSE–RESPONSE.
TRL options
When performing a TRL 2-PORT calibration, cer- tain options may be selected. CAL Z is used to specify whether skin-effect-related impedance vari- ation is to be used or not. Skin effect in lossy transmission line standards will cause a frequency- dependent variation in impedance. This variation can be compensated when the skin loss (offset loss) and the mechanically derived impedance (Offset Z0) are specified and CAL Z0: SYSTEM Z0 selected. CAL Z0: LINE Z0 specifies that the imped- ance of the line is equal to the Offset Z0 at all frequencies.
The phase reference can be specified by the Thru or Reflect during the TRL 2-PORT calibration. SET REF: THRU corresponds to a reference plane set by Thru standard (or the ratio of the physical lengths of the Thru and Line) and SET REF: REFLECT cor- responds to the Reflect standard.
LOWBAND FREQUENCY is used to select the mini- mum frequency for coaxial TRL calibrations. Below this frequency (typically 2 to 3 GHz) full 2-port calibrations are used.
Note
The resultant calibration is a single cal set combining the TRL and conventional full 2-port calibrations. For best results, use TRM calibration to cover frequencies below TRL cut-off frequency.
Calibration kit label
A calibration kit label is selected to describe the connector type of the devices to be measured. If a new label is not generated, the calibration kit label for the kit previously contained in that calibration kit register (CAL 1 or CAL 2) will remain. The pre- defined labels for the two calibration kit registers are:
Calibration kit 1 | Cal 1 | Agilent 85050B |
| 7-mm B.1 | |
Calibration kit 2 | Cal 2 | Agilent 85052B |
| 3.5-mm B.1 | |
