• The exact composition of the menu depends on the settings made on the CAL SETUP, CAL METHOD, and LINE TYPE menus and on the resultant TWO PORT CAL SETUP dialog box.
• A representative menu is shown below.
• The example procedures at the end of this chapter show examples of various TWO PORT CAL menus.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 2-Port Cal | TWO PORT CAL
TWO PORT CAL MENU - 2-Port VNAs - Typical Example
Modify Cal Setup
Select displays the CAL SETUP menu where changes to the calibration method, line type, and associated parameters are made on the CAL METHOD and LINE TYPE submenus.
• Calibration method options are SOLT/SOLR, Offset Short (SSLT), Triple Offset Short (SSST), or LRL/LRM.
• Line Type options are Coaxial, Non-Dispersive, Waveguide, or Microstrip.
A composite view of the CAL SETUP menu set is available in figure below:
A display button showing the port numbers that are in the calibration.
Completion Menu Buttons
For this example menu, the Port 1 Reflective Devices to the Isolation (Optional) buttons link to completion submenus where additional calibration procedures are performed.
For example, the Port 1 Reflective Devices button (shown below at #1) links to the REFL. DEVICES PORT 1 submenu. As each procedure is completed, the submenu button is marked with a completion checkmark. When all the procedures on the submenu are completed, use the Back button to return to the FOUR PORT CAL menu.
The Port 1 Reflective Devices button (shown above at #2) is now marked with a completion checkmark.
Port 1 Reflective Devices
When selected, provides the REFL. DEVICES PORT 1 menu. Each button represents a completion task. When ready for the task, click the button, and the instrument performs the calibration. When the calibration task is successfully completed, the button is marked with a completion checkmark. When all tasks are completed on the menu, return to the TWO PORT CAL menu.
Port 2 Reflective Devices
When selected, displays the REFL. DEVICES PORT 2 menu. When all tasks are completed, return to the TWO PORT CAL menu.
Thru/Recip
When selected, displays the THRU/RECIP menu. When all tasks are completes, return to the TWO PORT CAL menu.
Isolation (Optional)
When selected, displays the ISOLATION menu. When all tasks are completed, return to the TWO PORT CAL menu.
Done
This button is unavailable until all calibration tasks have been successfully completed. When available, select the button to return to the CALIBRATION menu when the Cal Status is set to ON.
Manual 2-Port Cal Setup Dialog Boxes - 2-Port VNAs
From the TWO PORT CAL menu, Modify Cal Setup button links to the CAL SETUP menu, where the Edit Cal Params button displays the appropriate configuration dialog box with that vary depending on the settings made in the MANUAL CAL, CAL SETUP, CAL METHOD, and LINE TYPE menus. Sample dialog boxes are described in the sections below for:
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 2-Port Cal | TWO-PORT CAL | Modify Cal Setup | CAL SETUP | Edit Cal Params | TWO-PORT CAL SETUP (SOLT/R, COAXIAL Dialog Box
Edit Cal Params - TWO PORT CAL SETUP (SOLT/R, COAXIAL) Dialog Box
Reference Impedance
Input the reference impedance.
• Input field defaulted to 50 Ohms.
• Any numerical value accepted although input values <0.01 Ohms are converted to 0.01 Ohms.
Select Cal Type
Select from three radio button controlled options:
• Full 2 Port
• 1 Path 2 Port (1 --> 2)
• 1 Path 2 Port (2 --> 1)
Load Type Area
Select from two radio button controlled options:
• Broadband Load
• Sliding Load. If Sliding Load is selected:
• A message appears in the “Still requires broadband loads below sliding load breakpoint frequency.”
• A Sliding Load button appears on the PORT 1 REFLECTIVE DEVICES menu and on the PORT 2 REFLECTIVE DEVICES menu.
Test Port 1 Connector Type Area
Select the DUT Connector Type from a drop-down menu list with options of:
• 0.8 mm Conn (M)
• 0.8 mm Conn (F)
• W1-Conn (M)
• W1-Conn (F)
• V-Conn (M)
• V-Conn (F)
• K-Conn (M)
• K-Conn (F)
• 2.4 mm (M)
• 2.4 mm (F)
• GPC-3.5 (M)
• GPC-3.5 (F)
• SMA (M)
• SMA (F)
• N-Conn (M)
• N-Conn (F)
• N-Conn (75) (M)
• N-Conn (75) (F)
• GPC-7
• 7/16 (M)
• 7/16 (F)
• TNC (M)
• TNC (F)
• User-Defined1 (M) through User-Defined32 (M)
• User-Defined1 (F) through User-Defined32 (F)
Select BB Load for Test Port 1 Area
Select BB Load number for Test Port 1:
• Load 1
• Load 2
Test Port 1 Connector Standard Info Button
Select displays the Standard Info dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depends on the connector selected above and on the Cal Method selected.
Test Port 2 Connector Type Area
Select the DUT Connector Type from a drop-down menu list with options the same as the Test Port 1 Connector area above.
Test Port 2 Connector Standard Info Button
Select displays the Standard Info dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depends on the connector selected above and on the Cal Method selected.
Select BB Load for Test Port 2 Area
Select BB Load number for Test Port 2:
• Load 1
• Load 2
Through/Reciprocal Area
Located on the right side of the dialog box, these controls allow characterization of the through/reciprocal line settings.
• Select Line. Allows options of:
• Reciprocal
• Through
• Length (mm)
• Input line length in mm.
• Calculator icon displays the AIR EQUIVALENT LENGTH CONVERSION dialog box.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 2-Port Cal | TWO-PORT CAL | Modify Cal Setup | CAL SETUP | Edit Cal Params | TWO-PORT CAL SETUP (SSLT, COAXIAL Dialog Box
TWO PORT CAL SETUP (SSLT, COAXIAL) Dialog Box
Reference Impedance
Input the reference impedance.
• Input field defaulted to 50 Ohms.
• Any numerical value accepted although input values <0.01 Ohms are converted to 0.01 Ohms.
Select Cal Type
Select from three radio button controlled options:
• Full 2 Port
• 1 Path 2 Port (1 --> 2)
• 1 Path 2 Port (2 --> 1)
Load Type Area
Select from two radio button controlled options:
• Broadband Load
• Sliding Load. If Sliding Load is selected:
• A message appears in the “Still requires broadband loads below sliding load breakpoint frequency.”
• A Sliding Load button appears on the PORT 1 REFLECTIVE DEVICES menu and on the PORT 2 REFLECTIVE DEVICES menu.
Test Port 1 Connector Type Area
Select the DUT Connector Type from a drop-down menu list with options of:
• 0.8 mm Conn (M)
• 0.8 mm Conn (F)
• W1-Conn (M)
• W1-Conn (F)
• User-Defined1 (M) through User-Defined32 (M)
• User-Defined1 (F) through User-Defined32 (F)
Select BB Load for Test Port 1 Area
Select BB Load number for Test Port 1:
• Load 1
• Load 2
Test Port 1 Connector Standard Info Button
Select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depends on the connector selected above and on the Cal Method selected.
Test Port 2 Connector Type Area
Select the DUT Connector Type from a drop-down menu list with options the same as the Test Port 1 Connector area above.
Test Port 2 Connector Standard Info Button
Select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depends on the connector selected above and on the Cal Method selected.
Select BB Load for Test Port 2 Area
Select BB Load number for Test Port 2:
• Load 1
• Load 2
Through/Reciprocal Area
Located on the right side of the dialog box, these controls allow characterization of the through/reciprocal line settings.
• Select Line. Allows options of:
• Reciprocal
• Through
• Length (mm)
• Input line length in mm.
• Calculator icon displays the AIR EQUIVALENT LENGTH CONVERSION dialog box.
• Line Impedance (Ohms)
• Input defaults to be 50 Ohms. Any numeric value accepted.
• Line Loss (dB/mm)
• Allows input of a line loss in dB per mm at the frequency specified in the field below.
• @ Frequency (GHz)
• Allows input of a frequency setting for the Line Loss factor input above.
OK / Cancel
Click OK to accept the changes and return to the CAL SETUP menu.
Click Cancel to abandon any changes and return to the CAL SETUP menu.
TWO PORT CAL SETUP (SSST, COAXIAL) Dialog Box - 2-Port VNA
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 2-Port Cal | TWO-PORT CAL | Modify Cal Setup | CAL SETUP | Edit Cal Params | TWO-PORT CAL SETUP (SSST, COAXIAL Dialog Box
Edit Cal Params - TWO PORT CAL SETUP (SSST, COAXIAL) Dialog Box
Reference Impedance
Input the reference impedance.
• Input field defaulted to 50 Ohms.
• Any numerical value accepted although input values <0.01 Ohms are converted to 0.01 Ohms.
Select Cal Type
Select from three radio button controlled options:
• Full 2 Port
• 1 Path 2 Port (1 --> 2)
• 1 Path 2 Port (2 --> 1)
Load Type
Select from two radio button controlled options:
• Broadband Load
• Sliding Load. If Sliding Load is selected:
• A message appears in the “Still requires broadband loads below sliding load breakpoint frequency.”
• A Sliding Load button appears on the PORT 1 REFLECTIVE DEVICES menu and on the PORT 2 REFLECTIVE DEVICES menu.
Test Port 1 Connector Type Area
Select the DUT Connector Type from a drop-down menu list with options of:
• 0.8 mm Conn (M)
• 0.8 mm Conn (F)
• W1-Conn (M)
• W1-Conn (F)
• User-Defined1 (M) through User-Defined32 (M)
• User-Defined1 (F) through User-Defined32 (F)
Test Port 1 Connector Standard Info Button
Select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depends on the connector selected above and on the Cal Method selected.
Test Port 2 Connector Type Area
Select the DUT Connector Type from a drop-down menu list with options the same as the Test Port 1 Connector area above.
Test Port 2 Connector Standard Info Button
Select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depends on the connector selected above and on the Cal Method selected.
Through/Reciprocal Area
Located on the right side of the dialog box, these controls allow characterization of the through/reciprocal line settings.
• Select Line. Allows options of:
• Reciprocal
• Through
• Length (mm)
• Input line length in mm.
• Calculator icon displays the AIR EQUIVALENT LENGTH CONVERSION dialog box.
• Line Impedance (Ohms)
• Input defaults to be 50 Ohms. Any numeric value accepted.
• Line Loss (dB/mm)
• Allows input of a line loss in dB per mm at the frequency specified in the field below.
• @ Frequency (GHz)
• Allows input of a frequency setting for the Line Loss factor input above.
OK / Cancel
Click OK to accept the changes and return to the CAL SETUP menu.
Click Cancel to abandon any changes and return to the CAL SETUP menu.
TWO PORT CAL SETUP (LRL/LRM, COAXIAL) Dialog Box - 2-Port VNA
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 2-Port Cal | TWO-PORT CAL | Modify Cal Setup | CAL SETUP | Edit Cal Params | TWO-PORT CAL SETUP (LRL/LRM, COAXIAL Dialog Box
Edit Cal Params - TWO PORT CAL SETUP (LRL/LRM, COAXIAL) Dialog Box
Reference Impedance
Input the reference impedance.
• Input field defaulted to 50 Ohms.
• Any numerical value accepted although input values <0.01 Ohms are converted to 0.01 Ohms.
Reference Plane Location
Select from two radio button controlled options:
• Ends of Line 1
• Middle of Line 1
Band Definition
Select one or two bands from the pull-down menu.
• Number of Bands = 1. Only the Band 1 Definition Area is present.
• Number of Bands = 2. The Band 1 Definition and the Band Break Point areas appear.
Band 1 Definition
Provides the following fields and controls for Band 1:
• Band 1 Device 1 = Defaulted to Line.
• Line Length (mm) for Device 1. Allows input of the line length in mm.
• Line Loss (dB/mm). Allows input of a line loss in dB per mm at the frequency specified in the field below.
• @ Frequency (GHz). Allows input of a frequency setting for the Line Loss factor input above.
• Band 1 Device 2. Select from Line or Match in pull-down menu.
• If Line is selected, Type of Reflection allows selection of Use Open-like component or Use Short-like component.
• If Use Open-line component is selected, the Reflection Component area at bottom of dialog box displays the Open-like Offset Length (mm) field.
• If Use Short-like component is selected, the Reflection Component area at bottom of dialog box displays Short-line Offset Length (mm) field.
Band 2 Definition
The Number of Bands field above must be set to “2” for this area and the Band Break Point area described below to be displayed. Provides the following fields and controls for Band 2.
Band 2 Device 3
A pull-down menu with selections of:
• Use device 1
• Use device 2
• Use new line. If selected, additional fields appear as Line Length (mm), Line Loss (dB/mm), and @ Frequency (GHz).
Band 2 Device 4
A pull-down menu with selections of:
• Line
• Match
If Line is selected for Device 4, the Type of Reflection and Line Length (mm) fields are available. The Type of Reflection field choices are limited to:
• Use Short-like component. If selected, the Reflection Component area below has one field of Short-like Offset Length (mm) field.
• Use Open-like component. If selected, the Reflection Component area below has two fields of Open-like Offset Length (mm) and Short-like Offset Length (mm).
If Match is selected for Device 4, the Match Info button and the Type of Reflection fields are available. is available with choices of:
• The Match Info button appears. Select displays the USER DEFINED MATCH DEVICES dialog box appears which allows configuration of the match devices.
• The Type of Reflection field has the following choices:
• Use Short-like component. If selected, the Reflection Component area below has one field of Short-like Offset Length (mm) field.
• Use Open-like component. If selected, the Reflection Component area below has two fields of Open-like Offset Length (mm) and Short-like Offset Length (mm).
• Use both. If selected, pair of radio button fields appear and allow selection of either Use Port 1 Match or Use Port 2 Match. Also, if selected, the Reflection Component area below has two fields of Open-like Offset Length (mm) and Short-like Offset Length (mm).
Band Break Point
This area only appears if the Number of Bands in the Band Definition area is set to “2”.
The Calculate Recommended Value button calculates the recommended break point value based on the input parameters in the fields above. Clicking the button calculates a break point frequency value and populates the Use Recommended Frequency (GHz) field.
A radio button set allows selection of either:
• Use Recommended Frequency (GHz) which was calculated by the button above.
• Define New Frequency (GHz) field which allows direct user input of a break frequency value.
Reflection Component
Depending on the settings in the fields above, this area provides up to two input fields.
• Open-like Offset Length (mm)
• Short-like Offset Length (mm)
OK / Cancel
Click OK to accept the changes and return to the CAL SETUP menu.
Click Cancel to abandon any changes and return to the CAL SETUP menu.
Manual 2-Port Cal Dialog Box Summary
The table below summarizes the available fields in all 2-port calibration setup dialog boxes. If the dialog box is described above, a link is provided to that description. To view each dialog box, set the CAL METHOD and LINE TYPE menus to the appropriate settings, and then select the Edit Cal Params button. All dialog boxes are named “Two Port Cal Setup (Cal Method, Line Type)”
Manual 2-Port Cal Setup Dialog Box Summary - 2-Port VNAs
Select Cal Type: Full 2 Port, 1 Path 2 Prt (1-->2), 1 Path 2 Port (2-->1)
Load Type: Broadband Load, Sliding Load
Test Port 1 and Test Port 2 controls are the same.
Test Port DUT Connector: For each selected test port, select one of the following connectors: 0.8 mm-Conn (M), 0.8 mm-Conn (F), W1-Conn (M), W1-Conn (F), V-Conn (M), V-Conn (F), K-Conn (M), K-Conn (F), 2.4 mm (M), 2.4 mm (F), GPC-3.5 (M), GPC-3.5 (F), SMA (M), SMA (F), N-Conn (M), N-Conn (F), N-Conn (75) (M), N-Conn (75) (F), GPC-7, 7/16 (M), 7/16 (F), TNC (M), TNC (F), User-Defined1 (M) through User-Defined32 (M), User-Defined1 (F) through User-Defined32 (F)
Test Port Connector Standard Info Button: For each DUT port connector, displays the STANDARD INFORMATION or USER-DEFINED dialog box for the selected connector.
Select Cal Type: Full 2 Port, 1 Path 2 Prt (1-->2), 1 Path 2 Port (2-->1)
Load Type: Broadband Load, Sliding Load
Test Port 1 and Test Port 2 controls are the same.
Test Port DUT Connector: For each test port, select one of the following connectors: 0.8 mm‑Conn (M), 0.8 mm-Conn (F), W1-Conn (M), W1-Conn (F), User-Defined1 (M) through User-Defined32 (M), User-Defined1 (F) through User-Defined32 (F)
Test Port Connector Standard Info Button: For each DUT port connector, displays the STANDARD INFORMATION or USER-DEFINED dialog box for the selected connector.
Select Cal Type: Full 2 Port, 1 Path 2 Prt (1-->2), 1 Path 2 Port (2-->1)
Load Type: Broadband Load, Sliding Load
Test Port 1 and Test Port 2 controls are the same.
Test Port DUT Connector: For each test port, select one of the following connectors: 0.8 mm‑Conn (M), 0.8 mm-Conn (F), W1-Conn (M), W1-Conn (F), User-Defined1 (M) through User-Defined32 (M), User-Defined1 (F) through User-Defined32 (F)
Test Port Connector Standard Info Button: For each DUT port connector, displays the STANDARD INFORMATION or USER-DEFINED dialog box for the selected connector.
