Federal Department of Justice and Police FDJP

Federal Office of Metrology METAS

VNA Tools II in the lab – practical aspects

European Metrology workshop (iNRiM, Torino) Juerg Ruefenacht

Michael Wollensack 25.- 27. May 2011

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 2

Federal Office of Metrology METAS

VNA Tools II topics

• VNA Data Explorer (data visualisation only)

• The multistep measurement process

• Project examples

• The graphical user interface (GUI)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 3

Federal Office of Metrology METAS

The graphical user interface (GUI)

live demo

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 4

Federal Office of Metrology METAS

The multistep measurement process

Basic influence

parameters with

uncertainties

Multistep measurement process

S-parameter data with uncertainties

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 5

Federal Office of Metrology METAS

Specify: instrument settings (VNA hardware)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 6

Federal Office of Metrology METAS

Collect: settings, actions and measurement data

Measurement Journal (time stamps – log file of the complete measurement process)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 7

Federal Office of Metrology METAS

Define: type of calibration (1/3)

Calibration Config (first action: new calibration configuration)

• OnePort

• SOLT

• GSOLT

• QSOLT

• UnkwnownThru

• TRL

• Optimization

Calibration types:

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 8

Federal Office of Metrology METAS

Assign: measurement data – standard definitions (2/3)

Calibration Config

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 9

Federal Office of Metrology METAS

Calculate: Error Terms (3/3)

Calibration Config

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 10

Federal Office of Metrology METAS

Correct: the raw measurement data

Error Correction (Error correction of all data located in the raw measurements path)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 11

Federal Office of Metrology METAS

Visualisation / Comparison / Data Analysis (1/3)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 12

Federal Office of Metrology METAS

Visualisation / Comparison / Data Analysis (2/3)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 13

Federal Office of Metrology METAS

Visualisation / Comparison / Data Analysis (3/3)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 14

Federal Office of Metrology METAS

VNA Tools II project examples

• 1-Port Calibration

• 2-Port Calibration (SOLT vs Unknown Thru)

• 3-Port Calibration (if time is left)

live demo

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 15

Federal Office of Metrology METAS

VNA Data Explorer

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 16

Federal Office of Metrology METAS

Conclusions

• VNA expert application including uncertainty propagation

• High flexibility - Expert Tool

• Allows to directly compare different types of calibration

• Powerful visualisation for data analysis

• Data processing tools (including uncertainty data)

(Math / cascade / merge / mean / circle fit / interpolate…)

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 17

Federal Office of Metrology METAS

Thank you very much for your attention !

Federal Department of Justice and Police FDJP

Federal Office of Metrology METAS

© METAS Juerg Ruefenacht + Michael Wollensack European Metrology workshop, Torino 25.-27. May 2011 slide 18

Federal Office of Metrology METAS