This sections described the menus and dialog boxes uses for manual 3-port calibration on a VectorStar 4-Port VNA.
THREE PORT CAL Menu – 4-Port VNAs
Button Availability
• 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 THREE PORT CAL SETUP dialog box.
• The example procedures at the end of this chapter show examples of various THREE PORT CAL menus.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL
THREE PORT CAL Menu – 4-Port VNAs – Typical example (1 of 2)
Modify Cal Setup
Select displays the CAL SETUP menu where the Edit Cal Params button provides access to the THREE PORT CAL SETUP dialog box for the selected calibration method and line type.
Read-only display of the ports selected for the pending 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 THREE PORT CAL menu. (continued)
The Port 1 Reflective Devices button (shown below at #2) is now marked with a completion checkmark.
Port 1 Reflective Devices
Select displays the REFL. DEVICES PORT 1 submenu. When all procedures are complete, select the Back button to return to the THREE PORT CAL menu where this button is now marked with a completion checkmark.
Select displays the REFL. DEVICES PORT 2 submenu. When all procedures are complete, select the Back button to return to the THREE PORT CAL menu where this button is now marked with a completion checkmark.
Port 3 Reflective Devices
Select displays the REFL. DEVICES PORT 3 submenu. When all procedures are complete, select the Back button to return to the THREE PORT CAL menu where this button is now marked with a completion checkmark.
Thru/Recip
Select displays the THRU/RECIP submenu. When all procedures are complete, select the Back button to return to the THREE PORT CAL menu where this button is now marked with a completion checkmark.
If required, select displays the ISOLATION submenu. When all procedures are complete, select the Back button to return to the THREE PORT CAL menu where this button is now marked with a completion checkmark.
This button is unavailable until a successful calibration procedure has been completed. When available, it returns to the CALIBRATION menu where the Cal Status button is set to ON.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = SOLT/SOLR | Line Type = Coaxial | Edit Cal Params | THREE PORT CAL SETUP (SOLT/R, Coaxial) Dialog Box
THREE PORT CAL SETUP (SOLT/R, Coaxial) Dialog Box
1. Through selected allows user entries for length, line impedance, line loss, and frequency. Reciprocal selected allows user entry for length. S2P Thru selected provides buttons for loading, viewing, and characterization (to generate S2P files).
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.
Full Three Port Calibration Configuration
Select three (3) ports from the list below. If a fourth port selection is attempted, an earlier port is discarded:
• Port 1
• Port 2
• Port 3
• Port 4
Select Throughs
Select any combination of three possible throughs as long as two (2) are selected. The available port pair throughs are based on the ports selected above. For a 3-port calibration, only three of the following port pairs are available:
• Thru 1-2
• Thru 1-3
• Thru 1-4
• Thru 2-3
• Thru 2-4
• Thru 3.4
Thru Buttons
Each of the throughs above enables a Thru Info button that displays the THRU INFO dialog box allowing configuration of each through. A calculator icon in the THRU INFO dialog box allows access to the AIR EQUIVALENT LENGTH CALCULATOR dialog box.
• Sliding Load. If Sliding Load is selected, a message appears in the “Still requires broadband loads below sliding load breakpoint frequency.”
Only three of the Test Port configuration area are available based on the port selection above.
Test Port 1 DUT Connector
If Port 1 was selected above, 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) (Kit from Maury Microwave)
• TNC (F) (Kit from Maury Microwave)
• User-Defined1 (M) through User-Defined32 (M)
• User-Defined1 (F) through User-Defined32 (F)
Test Port 1 DUT Connector Standard Info Button
If Port 1 was selected above, select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depend on the selected connector, Cal Method, and Line Type. The example here shows a typical standard information dialog box.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = SSLT | Line Type = Microstrip | Edit Cal Params | THREE PORT CAL SETUP (SSLT, Microstrip) Dialog Box
THREE PORT CAL SETUP (SSLT, Microstrip) Dialog Box
1. Through selected allows user entries for length, line impedance, line loss, and frequency. Reciprocal selected allows user entry for length. S2P Thru selected provides buttons for loading, viewing, and characterization (to generate S2P files).
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.
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.
Full Three Port Calibration Configuration
Select three (3) ports from the list below. If a fourth port selection is attempted, an earlier port is discarded:
• Port 1
• Port 2
• Port 3
• Port 4
Select Throughs
Select any combination of three possible throughs as long as two (2) are selected. The available port pair throughs are based on the ports selected above. For a 3-port calibration, only three of the following port pairs are available:
• Thru 1-2
• Thru 1-3
• Thru 1-4
• Thru 2-3
• Thru 2-4
• Thru 3.4
Thru Buttons
Each of the throughs above enables a Thru Info button that displays the THRU INFO dialog box allowing configuration of each through. A calculator icon in the THRU INFO dialog box allows access to the AIR EQUIVALENT LENGTH CALCULATOR dialog box.
Only three of the Test Port configuration areas are available based on the port selection above.
Test Port 1 DUT Connector
If Port 1 was selected above, select the DUT Connector Type from a drop-down menu list with options of:
• User-Defined1 through User-Defined32
Test Port 1 DUT Connector Standard Info Button
If Port 1 was selected above, select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depend on the selected connector, Cal Method, and Line Type. The example here shows a typical standard information dialog box.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = SSST | Line Type = Coaxial | Edit Cal Params | THREE PORT CAL SETUP (SSST, Coaxial) Dialog Box
THREE PORT CAL SETUP (SSST, Coaxial) Dialog Box
1. Through selected allows user entries for length, line impedance, line loss, and frequency. Reciprocal selected allows user entry for length. S2P Thru selected provides buttons for loading, viewing, and characterization (to generate S2P files).
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.
Full Three Port Calibration Configuration
Select three (3) ports from the list below. If a fourth port selection is attempted, an earlier port is discarded:
• Port 1
• Port 2
• Port 3
• Port 4
Select Throughs/Reciprocals
Select any combination of three possible throughs as long as two (2) are selected. The available port pair throughs are based on the ports selected above. For a 3-port calibration, only three of the following port pairs are available:
• Thru 1-2
• Thru 1-3
• Thru 1-4
• Thru 2-3
• Thru 2-4
• Thru 3-4
Thru Info Buttons
Each of the throughs above enables a Thru Info button that displays the THRU INFO dialog box allowing configuration of each through. A calculator icon in the THRU INFO dialog box accesses the AIR EQUIVALENT LENGTH CALCULATOR dialog box.
Only three of the Test Port Configuration areas are available based on the port selection above.
Test Port 1 DUT Connector
If Port 1 was selected above, 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 DUT Connector Standard Info Button
If Port 1 was selected above, select displays the STANDARD INFO dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depend on the selected connector, Cal Method, and Line Type. The example here shows a typical standard information dialog box.
• Cal Method = Broadband Cal (SOLT/R-SSST/R) – Appears only with VNA in Broadband Mode (3739)
• Line Type = Coaxial
Navigation
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = Broadband Cal (SOLT/R-SSST/R) | Line Type = Coaxial | Edit Cal Params | THREE PORT CAL SETUP BROADBAND CAL, MERGED SOLT-SSST/SOLR-SSSR) Dialog Box
THREE PORT CAL SETUP Broadband Cal, Merged (SOLT/SOLR-SSST/SSSR) Dialog Box
1. Through selected allows user entries for length, line impedance, line loss, and frequency. Reciprocal selected allows user entry for length. S2P Thru selected provides buttons for loading, viewing, and characterization (to generate S2P files).
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.
Full Three Port Cal Config (Select 3 ports)
• Select three (3) ports from the list below. If a fourth port selection is attempted, an earlier port is discarded.
Select Thrus/Reciprocals Area
Select any combination of throughs as long as two are selected. For a 3-port calibration, the following port pairs are available:
Each of the Throughs above enables a Thru Info button that displays the THRU INFO dialog box allowing configuration of each through. A calculator icon in the THRU INFO dialog box allows access to the AIR EQUIVALENT LENGTH CALCULATOR dialog box.
• 67 GHz is recommended for the 3656 (1 mm) calibration kit.
• 80 GHz is recommended for the 3659 (0.8 mm) calibration kit.
• In this combined calibration, the breakpoint frequency defines the frequency above which the SSS algorithm will be used (and SOL will be used for the frequencies at or below the breakpoint). Default values are based on Anritsu calibration kits and are optimal for those components.
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)
• W1-Conn (M)
• User-Defined1 (M) through User-Defined32 (M)
• 0.8 mm-Conn (F)
• W1-Conn (F)
• 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 depend on the selected connector, Cal Method, and Line Type. The following link shows a typical standard information dialog box for broadband cal.
Identical function as with the Test Port 1 Connector Area above. Select the DUT Connector Type from a drop-down menu list.
Test Port 2 and Test Port 3 Connector Standard Info Button
Identical function as with the Test Port 1 Connector Standard Info Button above. Select displays the STANDARD INFO dialog box for the selected DUT Connector.
OK / Cancel
Click OK to accept the changes or Cancel to abandon any changes and return to the CAL SETUP menu.
THREE PORT CAL SETUP (TRL/TRM, Coaxial) Dialog Box
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = TRL/TRM | Line Type = Coaxial | Edit Cal Params | THREE PORT CAL SETUP (TRL/TRM, Coaxial)
THREE PORT CAL SETUP (TRL/TRM, Coaxial) Dialog Box – Cal A Tab
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.
Dielectric
Enter a value if different than the default.
Select Cal Type
Select one of the calibration options from:
• TRL/M + Singleton
• Two TRL/Ms
Full Three Port Cal Config (1-2, 3-4 combos are not allowed):
Cal A (Select Port Pair)
• 1,3
• 1,4
• 2,3
• 2,4
Cal B (Select Port Pair, One port must be shared with Cal A)
• 1,3
• 1,4
• 2,3
• 2,4
Cal A / Cal B Tabs
Access the Cal A or Cal B functions and controls by selecting either the Cal A or Cal B tab.
Line Length Representation
Select from three radio button controlled options:
• Effective Length (the free-space equivalent length)
• Delay
• Physical Length
Band Definition
Select one to five bands from the drop-down menu.
• Number of Bands = 1. Only the Band 1 Definition and editable parameters appear.
• Number of Bands = 2. The Band 2 Definition and editable parameters appear.
• Number of Bands = 3. The Band 3 Definition and editable parameters appear.
• Number of Bands = 4. The Band 4 Definition and editable parameters appear.
• Number of Bands = 5. The Band 5 Definition and editable parameters appear.
Band Parameter Definitions
• Cal Device
• Line
• Match
• Device Effective Length (mm)/Match
• Line: Enter device effective length for each band
• Enter a breakpoint frequency for Band 2–5. (The entries are active for bands 2–5.)
• Breakpoint Calculation
• Select to calculate a breakpoint frequency for band:
Reflection Component
• Enforce Passivity – Forces the reflection value to be passive at an intermediate step in the calibration, which rescales the reflection tracking terms.
• Enter Open-like and/or Short-like offset length
Last Loaded Kit Name, Save Kit, Load Kit, Restore Defaults
• Last Loaded Kit Name – Loaded kit name appears in the field. The name can be edited in this field and then saved as another kit.
• Save Kit – Saves the present cal setup.
• Load Kit – Click opens window to navigate to a desired existing TRL/TRM cal kit file (.lcf).
• Restore Defaults – Loads the instrument default values for the Cal Setup.
OK/Cancel
• OK and Cancel returns user to the CAL SETUP menu.
THREE PORT CAL SETUP (LRL/LRM, Coaxial) Dialog Box
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = LRL/LRM | Line Type = Coaxial | Edit Cal Params | THREE PORT CAL SETUP (LRL/LRM, Coaxial)
THREE PORT CAL SETUP (LRL/LRM, Coaxial) Dialog Box – Cal A Tab
Overview
The dialog box provides common areas at the top for Reference Impedance, Three Port Calibration Configuration, and Thru Selection. Below these common sections are two tabbed dialog areas for Cal A and Cal B.
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.
Dielectric
Enter a value if different than the default.
Select Cal Type
Select one of the calibration options from:
• LRL/M + Singleton
• Two LRL/Ms
Full Three Port Cal Config (1-2, 3-4 combos are not allowed):
Cal A (Select Port Pair)
• 1,3
• 1,4
• 2,3
• 2,4
Cal B (Select Port Pair, One port must be shared with Cal A)
• 1,3
• 1,4
• 2,3
• 2,4
Cal A / Cal B Tabs
Access the Cal A or Cal B functions and controls by selecting either the Cal A or Cal B tab.
Reference Plane Location
Select from two radio button controlled options:
• Ends of Line 1
• Middle of Line 1
Line Length Representation
Select from three radio button controlled options:
• Effective Length (the free-space equivalent length)
• Delay
• Physical Length
Band Definition
Select one to five bands from the drop-down menu.
• Number of Bands = 1. Only the Band 1 Definition and editable parameters appear.
• Number of Bands = 2. The Band 2 Definition and editable parameters appear.
• Number of Bands = 3. The Band 3 Definition and editable parameters appear.
• Number of Bands = 4. The Band 4 Definition and editable parameters appear.
• Number of Bands = 5. The Band 5 Definition and editable parameters appear.
Band Parameter Definitions
• Band # (Device #)
• Band 1 defines Devices as X = 1 and Y = 2
• Band 2 defines Devices as X = 3 and Y = 4
• Band 3 defines Devices as X = 5 and Y = 6
• Band 4 defines Devices as X = 7 and Y = 8
• Band 5 defines Devices as X = 9 and Y = 10
• Cal Device X
• Band 1 choice is
• Line
• Band 2 choices are
• New Line
• Bnd1 Cal Dev X
• Bnd1 Cal Dev Y
• Band 3 choices are
• New Line
• Bnd1 Cal Dev X
• Bnd1 Cal Dev Y
• Bnd2 Cal Dev X
• Bnd2 Cal Dev Y
• Band 4 choices are
• New Line
• Bnd1 Cal Dev X, Bnd1 Cal Dev Y
• Bnd2 Cal Dev X, Bnd2 Cal Dev Y
• Bnd3 Cal Dev X, Bnd3 Cal Dev Y
• Band 5 choices are
• NewLine
• Bnd1 Cal Dev X, Bnd1 Cal Dev Y
• Bnd2 Cal Dev X, Bnd2 Cal Dev Y
• Bnd3 Cal Dev X, Bnd3 Cal Dev Y
• Bnd4 Cal Dev X, Bnd4 Cal Dev Y
• Device X Length (mm)
• Enter device length for each band
• Cal Device Y
• Select Line or Match for each band.
• Device Y Length (mm)/Match
• Enter device length for each band if Device Y is Line.
• Enter a breakpoint frequency for Band 2–5. (The entries are active for bands 2–5.)
• Breakpoint Calculation
• Select to calculate a breakpoint frequency for band:
Reflection Component
• Enforce Passivity – Forces the reflection value to be passive at an intermediate step in the calibration, which rescales the reflection tracking terms.
• Enter Open-like and/or Short-like offset length
Last Loaded Kit Name, Save Kit, Load Kit, Restore Defaults
• Last Loaded Kit Name – Loaded kit name appears in the field. The name can be edited in this field and then saved as another kit.
• Save Kit – Saves the present cal setup.
• Load Kit – Click opens window to navigate to a desired existing LRL/LRM cal kit file (.lcf).
• Restore Defaults – Loads the instrument default values for the Cal Setup.
OK/Cancel
• OK and Cancel returns user to the CAL SETUP menu.
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE | Manual Cal | MANUAL CAL | 3-Port Cal | THREE PORT CAL | Modify Cal Setup | CAL SETUP | Cal Method = mSSS | Line Type = Coaxial | Edit Cal Params | THREE PORT CAL SETUP (mSSS, Coaxial) Dialog Box
THREE PORT CAL SETUP (mSSS, Coaxial) Dialog Box
1. Through selected allows user entries for length, line impedance, line loss, and frequency. Reciprocal selected allows user entry for length. S2P Thru selected provides buttons for loading, viewing, and characterization (to generate S2P files).
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 Throughs
Select any combination of three possible throughs as long as two (2) are selected. The available port pair throughs are based on the ports selected above. For a 3-port calibration, only three of the following port pairs are available:
• Thru 1-2
• Thru 1-3
• Thru 1-4
• Thru 2-3
• Thru 2-4
• Thru 3-4
Thru Info Buttons
Each of the throughs above enables a Thru Info button that displays the THRU INFO dialog box allowing configuration of each through. A calculator icon in the THRU INFO dialog box allows access to the AIR EQUIVALENT LENGTH CALCULATOR dialog box.
Editable if the Cal Kit Sel selected is “Other”; otherwise it will reflect the offset length of the selected short in the cal kit standard (Kit Info column).
Cal Kit Selection
Select the DUT Connector Type from a drop-down menu list with options of:
• Other
• 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)
Kit Info Button
Select displays the STANDARD INFO or USER DEFINED STANDARD dialog box for the selected connector and calibration method that displays the connector calibration coefficients. The dialog box contents depend on the selected connector, Cal Method, and Line Type. The examples show typical standard information dialog boxes.
• Since the STANDARD INFORMATION (mSSS) dialog derives from the SSS calibration kit definition, three shorts are available and the one to be used for the current line in the mSSS table is defined by the Select Short to use field. All of the shorts in the kit can be employed in the mSSS calibration, but each must be assigned to a separate line in the table.
This field (in conjunction with the @Frequency field and the offset length) is used to compute the loss in the short and hence the magnitude of its reflection coefficient. This is mainly relevant for very large offset lengths (> 10 mm) at microwave frequencies or somewhat shorter lengths at millimeter wave frequencies.
@Frequency (GHz)
This field (in conjunction with the loss in dB/mm and the offset length) is used to compute the loss of the offset short (and hence the magnitude of its reflection coefficient) at each frequency. If a non-zero value is entered here, it is treated as the reference frequency fref at which the loss (dB/mm) was defined and the loss at all other frequencies is scaled by sqrt(f/fref). If 0 is entered here, the loss is assumed to be constant with frequency.
Use Match Checkbox
When this box is checked, a match measurement is acquired during the calibration and is used whenever even the collection of offset shorts does not have enough phase separation (value defined within the USER DEFINED MATCH dialog: Electrical line length delta for match use, expressed in degrees). The decision to use the match data is made on a frequency-by-frequency basis. See the MS464XB Calibration and Measurement Guide for more information. This helps increase bandwidth of the calibration, particularly at lower frequencies, if a match standard is available.
When this box is checked, more weight is given to those offset shorts that contribute most to large electrical length deltas and hence to bandwidth of the calibration. More details can be found in the MS464XB Calibration and Measurement Guide. Using this feature can increase the available bandwidth of the calibration, but does reduce immunity to repeatability variances in the setup, so it is not advised in more repeatability challenged scenarios (e.g., fixtures where the short standards are attached by spring force alone).
Port 2, Port 3, and Port 4 Tabs – Short Definition
Identical functions as with the Test Ports: Port 1 Tab 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.
Summary of 3-Port Calibration Setup Dialog Boxes
The table below summarizes the available fields in all available 3-port calibration setup dialog boxes. If the dialog box is described in greater detail 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 three-port dialog boxes are named “Three Port Cal Setup (Cal Method, Line Type)”
3-Port Manual Cal Setup Dialog Box Summary – 4-Port VNAs (1 of 8)
Note: Broadband Calibration is available only in Broadband configuration enabled with Option 08x and 3739 Test Set.
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 Through Area
Select any combination of throughs as long as three are selected. For a 4-port calibration, the following port pairs are available:
Each of the Throughs enables a Thru Info button that displays the THRU INFO dialog box allowing configuration of each through. A calculator icon in the THRU INFO dialog box allows access to the AIR EQUIVALENT LENGTH CALCULATOR dialog box.
67 GHz is recommended for the 3656 (1 mm) calibration kit. 80 GHz is recommended for the 3659 (0.8 mm) calibration kit.
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 depend on the selected connector, Cal Method, and Line Type. The following link shows a typical standard information dialog box for broadband cal.
Test Port 2, Test Port 3, and Test Port 4 Connector Type Area: Identical function as with the Test Port 1 Connector Area above. Select the DUT Connector Type from a drop-down menu list.
Test Port 2, Test Port 3, and Test Port 4 Connector Standard Info Button: Identical function as with the Test Port 1 Connector Standard Info Button above. Select displays the STANDARD INFO dialog box for the selected DUT Connector.
OK / Cancel: Click OK to accept the changes or Cancel to abandon any changes and return to the CAL SETUP menu.
Dielectric – Enter a value if different than the default.
Select Cal Type: TRL/M + Singleton, Two TRL/Ms
Cal A Ports: Select two port pairs from 1-3, 1-4, 2-3, 2-4
Cal B Ports: Auto-selected non-Cal A Port Pairs: 1-3, 1-4, 2-3, 2-4
Cal A and Cal B tabs: The “A” and “B” calibration parameters are selected via a tabbed menu within the dialog box.
Line Length Representation: Effective Length, Delay, Physical Length
Number of Bands: 1 through 5
Cal A Configuration Parameters:
• Cal A Reference Plane Location: Ends of Line, Middle of Line 1
• Cal A Number of Bands: 1 through 5
• Cal A Band 1 Device 1 Line: Line Length (mm) or Delay (ps), Line Loss (dB/mm), @ Frequency (GHz)
• Cal A Band 1-5 Type: Line, Match; Device Effective Length (mm)/Match; If Device 1 = Match, Match Info button displays USER DEFINED MATCH DEVICES dialog box for selected calibration kit. USER DEFINED MATCH DEVICES Dialog Box – TRL/TRM
• Reflection Type: Open-Like Short-Like; Cal A Band Breakpoint: Calculate Recommended Value, Use Recommended Frequency (GHz), Define New Frequency (GHz).
• Cal A Reflection Component: Enforce Passivity
• Cal A Reflection Component: Open-like Length (mm), Short-like Offset Length (mm)
• Last Loaded Kit Name – TRL/TRM/LRL/LRM Cal Kit file name last loaded
• Save Kit – Save calibration kit data to an TRL/TRM/LRL/LRM cal kit file (.lcf)
Dielectric – Enter a value if different than the default.
Select Cal Type: LRL/M + Singleton, Two LRL/Ms
Cal A Ports: Select two port pairs from 1-3, 1-4, 2-3, 2-4
Cal B Ports: Auto-selected non-Cal A Port Pairs: 1-3, 1-4, 2-3, 2-4
Cal A and Cal B tabs: The “A” and “B” calibration parameters are selected via a tabbed menu within the dialog box.
Reference Plane Location: Ends of Line 1, Middle of Line 1
Line Length Representation: Effective Length, Delay, Physical Length
Number of Bands: 1 through 5
• If 1, only Band 1 Device 1 and Band 1 Device 2 controls appear.
• If 2, the above plus Band 2 Device 3 and Band 2 Device 4 controls appear.
• If 3, the above plus Band 3 Device 5 and Band 3 Device 6 controls appear.
• If 4, the above plus Band 4 Device 7 and Band 4 Device 8 controls appear.
• If 5, the above plus Band 5 Device 9 and Band 5 Device 10 controls appear.
Cal A Configuration Parameters:
• Cal A Reference Plane Location: Ends of Line, Middle of Line 1
• Cal A Number of Bands: 1 through 5
• Cal A Band 1 Device 1 Line: Line Length (mm) or Delay (ps), Line Loss (dB/mm), @ Frequency (GHz)
• Cal A Band 1 Device 2 Type: Line, Match; Use Short-like component, Use Open-like component, Use both; If Device 2 = Match, Match Info button displays USER DEFINED MATCH DEVICES dialog box for selected calibration kit.
Loss (dB/mm): Used to compute the loss in the short and hence the magnitude of its reflection coefficient.
@Frequency: Used to compute the loss of the offset short (and hence the magnitude of its reflection coefficient) at each frequency.
Use Match: When this box is checked, a match measurement is acquired during the calibration and is used whenever even the collection of offset shorts does not have enough phase separation.
Optimal Offset Length Super-Weighting: When this box is checked, more weight is given to those offset shorts that contribute most to large electrical length deltas and hence to bandwidth of the calibration.
Test Port 1, Test Port 2, Test Port 3, and Test Port 4 controls are the same.
mSSS
Non-Dispersive
Same controls as mSSS Coaxial above.
mSSS
Waveguide
Same controls as mSSS Coaxial with the following changes:
Cutoff Frequency: The cutoff frequency for the TE10 mode in the waveguide size being used for this calibration (all shorts are assumed to have the same aperture dimensions and hence the same cutoff frequency).
Dielectric: The dielectric constant of any filling material in the waveguide interface being used for the calibration (assumed 100% fill; default value is 1).
mSSS
Microstrip
Same controls as mSSS Coaxial with the following changes:
Cal Kit Selection: User-Defined1 through User-Defined32.
Microstrip Kit: 10 Mil Kit, 15 Mil Kit, 25 Mil Kit, User-Defined 1 to User-Defined 32
Microstrip Info button: Displays MICROSTRIP INFO dialog box for selected calibration method and kit.
