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Sample Measurement Procedure

This section shows a sample measurement procedure for impedance measurement.

Here is the typical steps.

  1. Preparation

  2. Setup an impedance measurement

  3. Calibration at the 3.5 mm connector on the adapter box using 85052DH02

  4. Place the 19168A fixture main body on the adapter box.

  5. Fixture Compensation at the 16198A contact board.

  6. Place your DUT on the 16198A contact board.

  7. Make an measurement.

1. Preparation

Prepare the required calibration kit, fixture and calibration data files. See Measurement Preparation.

2. Setup an impedance measurement

Create Impedance Measurement Analysis

  1. On the VNA front panel, press Meas > S-Param > Meas Class....

Select Impedance Analysis, then either:

Setup the Stimulus measurement parameter

  1. An Impedance Analysis Setup is displayed. Set up your required settings, then click OK or Apply.

    Note: When the stop frequency is set over 10 GHz, the calibration and fixture compensation cannot be executed.

    Note: OSC Level (Power Level) should be equal to or less than -16 dBm for the 16198A measurement.

  2. If the adapter box is connected with the port other than port 1. Select RF Rath tab. Then select VNA port and click OK


  3. If you want to setup the other parameters such as averaging, setup them from softkey.

Setup the trace and measurement parameter.

  1. Click Meas, then select your required impedance parameter.

  2. Click Format, then select your required format according to the table below

    Parameter  

    Description

    Parameter in Meas softkey

    Format

    |Z|

    Absolute impedance

    Z

    Lin Mag

    θz

    Impedance phase

    Z

    Phase or Unwrapped Phase

    Z

    Impedance (complex value)

    Z

    Complex or Polar

    |Y|

    Absolute admittance

    Y

    Lin Mag

    θy

    Admittance phase

    Y

    Phase or Unwrapped Phase

    Y

    Admittance (complex value)

    Y

    Complex or Polar

    R

    Equivalent series resistance

    Z

    Real

    X

     Equivalent series reactance

    Z

    Imaginary

    G

    Equivalent parallel conductance

    Y

    Real

    B

    Equivalent parallel susceptance

    Y

    Imaginary

    Ls

    Equivalent series inductance

    Ls

    Real

    Lp

    Equivalent parallel inductance

    Lp

    Real

    Cs

    Equivalent series capacitance

    Cs

    Real

    Cp

    Equivalent parallel capacitance

    Cp

    Real

    Rs

    Equivalent series resistance

    Rs

    Real

    Rp

    Equivalent parallel resistance

    Rp

    Real

    Q

    Q value

    Q

    Real

    D

    Dissipation factor

    D

    Real

  3. If you need more traces for the other parameters, click Trace > New Trace..., then select the parameters your required. You can add/change the parameter after the calibration as well.

3. Calibration at the 3.5 mm connector on the adapter box using 85052DH02

This procedure calibrate the 3.5 mm port on adapter box using 3.5 mm calibration kit. The Smart Cal is a wizard for calibration at 3.5 mm port and fixture compensation. The first page of Smart Cal defines both cal kit for 3.5 mm and fixture compensation for the 16198A in advance.

Setup the calibration and compensation

  1. Click Cal > Cal Sets & Cal Kits > Cal Kit..., then Manage Cal Kit dialog box is displayed.

  2. Click Import... , then select your 85052DH02 calibration data file.

  3. Confirm that your 85052DH02 calibration kit is listed in the Standard Cal Kits.

  4. Click Cal > Main > Smart Cal..., then Smart Cal dialog box is displayed.

  5. Select your calibration kit from Cal Kit pull down menu.

  6. Click "..." for Fixture Database and select your 16198A fixture calibration data file.

  7. Specify fixture standard values for open and short compensations. Recommended values for 16198A open state is Open G: 0 S, Open C - 7.5 fF. For short bar: Short R: 0 ohm, Short L: 0.19 nH.

  8. Click Next

Impedance Smart Cal dialog box help

Import Cal from  Choose Cal Sets file from "..." if  you have a Cal Set with 85052DH02.

  • Check: The selected Cal Set file is used for S-Parameter calibration. The selected calibration kit in S-Parameter Calibration is ignored. If you set a STD Class Cal Set (Cal Set was taken in STD class with 85052DH), only S-parameter calibration can be skipped.

  • Uncheck: Execute S-Parameter calibration and Fixture Compensation from scratch.

Import Fixture Cal from

  • Check:  The open/short fixture compensations are also skipped. The fixture data file name and fixture standard data are displayed and the open/short fixture compensations data in the Cal Set file is used.
    When you use a Cal Set file with ZA class, importing a Cal Set file from Cal > Cal Sets & Cal Kits > Cal Sets.... is the equivalent operation

  • Uncheck: Retake a Fixture Compensation only. S-Parameter calibration data is used from the selected Cal Set file. If selected Cal Set file is STD class, this cannot be checked.

S-Parameter Calibration

Connector  Only 3.5 mm can be selected for the19198A.

Cal Kit  Select the calibration data which you imported at Cal Kit diaglog box.

Cal Kit Gender Only female can be selected for the 19198A.

 

Fixture Compensation

Fixture Data File Display the imported fixture calibration data file. Import the fixture calibration data file by clicking "...".

Fixture Standards Define the values for open/short standard values. Open Conductance (G), Open Capacitance (C), Shot Inductance (L) and Shot resistance (R). See the procedure above for the 16198A.

Next > is not activated in the following conditions.

  • Fixture Data File is NOT selected.

  • The selected Cal Set file includes the data over 10 GHz when the Import Cal from is checked.

 

 

  1. Connect 85052BH02 Open (f) on the 3.5 mm connector of the adapter box. Confirm if the standard number is matched with one in the dialog box.

  2. Click Measure.

  3. Click Next > after the open measurement is done.

  4. Connect 85052BH02 Short (f) instead of Open.

  5. Click Measure.

  6. Click Next > after the short measurement is done.

  7. Connect 85052BH02 Load (f) instead of Short.

  8. Click Measure.

  9. Click Next > after the load measurement is done.

  10. The menu about open for fixture is displayed.

4. Place the 19168A fixture main body on the adapter box

  1. Align the 16198A test fixture with the adapter's mount post and 3.5-mm connector, then set it gently in place

  2. Turn the adapter's 3.5-mm connector counterclockwise, connecting the bottom of the test fixture with the connector. The tightening torque used is 0.9 Nm.

5. Fixture Compensation at the 16198A contact board.

  1. Set the 16198A fixture at open state.

  2. Click Measure.

  3. Click Next > after the open measurement is done.

  4. Set the required weight for pressure. The recommended weight for short bar is 200 to 300 g.

  5. Place the short bar on the contact board. See the 16198A user's guide in https://www.keysight.com/manuals/16198a for details.

  6. Set the 16198A at close state.

  7. Click Measure.

  8. Click Next > after the short measurement is done.

  9. Click Save As User CalSet... to save the calibration data into Cal Set file for future use.

  10. Click Finish to finish the calibration and compensation for impedance analysis.

6. Place your DUT on the 16198A contact board.

  1. Remove the short bar.

  2. Set your DUT on the contact board.

7. Make an measurement.

You can observe the measurement result on the screen.