VectorStar™ MS4640A Series Microwave Vector Network Analyzers : Calibration Menus - 4-Port VNAs : Primary Menus for 4-Port VNA Calibration
 
Primary Menus for 4-Port VNA Calibration
The menus shown below provide the primary control for all 4-Port VNA calibration functions. From the AUTOCAL menu (below at #5), additional menus and dialog boxes provide configuration and setup for the 4-Port, 2-Port, and 1-Port AutoCal calibration procedures. From the MANUAL CAL menu (below at #6), additional menus and dialog boxes provide configuration and setup for the manual calibration 4-Port, 3-Port, 2-Port, 1-Port, Transmission Frequency Response, and Reflection Frequency Response procedures.
Primary Calibration Menus for 4-Port VNAs 
1. MAIN menu
2. CALIBRATION Menu
3. CALIBRATE Menu
4. THRU UPDATE Menu
5. AUTOCAL PORTS Menu
6. MANUAL CAL Menu
7. CAL KIT/AUTOCAL Menu for characterization file management.
CAL OPTIONS Menu with links to calibration utilities menus and dialog boxes.
CALIBRATION [TR] Menu - 4-Port VNAs
Use the CALIBRATION menu to setup calibration options, configure AutoCal and cal kit characterization files, and to configure and run calibration routines.
Full Name
• CALIBRATION [TRANSMISSION-RESPONSE] Menu
Prerequisites
• The VNA is in 4-Port mode.
• The VNA is equipped with a Multiport Test Set.
Menu Name
• The name of the CALIBRATION menu is appended with [TR] for transmission/reflection operational mode.
• The instrument operation mode is set on the APPLICATION menu.
• MAIN | Application |APPLICATION
• Application Menus - Overview
• Application Menus - Multiple Source
• Application Menus - Broadband/Millimeter-Wave
• Application Menus - Noise Figure
• Application Menus - Mixer Setup
• Application Menus - NxN
Previous
• MAIN MENU
Navigation
• MAIN | Calibration | CALIBRATION
 
CALIBRATION Menu - 4-Port VNAs 
Cal Status (Off/On)
The Cal Status toggle button displays the calibration status based on the last calibration run.
If not calibrated, Cal Status cannot be changed from OFF and a calibration run must be successfully completed before the status can be changed.
If calibrated, Cal Status status can be toggled between OFF and ON. If ON, the Channel Status bar at the bottom of the display area shows a status of CORR in green.
Calibrate
Use the Calibrate button to start the AutoCal or manual calibration process. Options on sub-menus allow for selection of automatic or manual calibration, calibration type, calibration method, line type and other calibration parameters. Select displays the CALIBRATE menu.
Thru Update
Thru update is a calibration refreshing technique where the user connects a thru line and quickly refreshes the transmission tracking and load match terms without the time and complexity of a full calibration run. The thru update is essentially a one-step refresh calibration for Full 2 Port and 1 Path-2 Port calibrations.
Select displays the THRU UPDATE menu. If the Thru Update button is not available, a Full 4-Port, Full 3-Port, Full 2-Port, or 1 Path-2 Port calibration is not active. Complete one of the required calibrations to activate the Thru Update button.
Cal Kit/AutoCal Characterization
Use this menu to save, load, and recall characterization files for AutoCal and manual calibration kits. Select displays the CAL KIT/AUTOCAL menu.
Cal Options
Select displays the CAL OPTIONS menu.
 
 
CALIBRATE Menu - 4-Port VNAs
Use the CALIBRATE menu to start the AutoCal or manual calibration process. Sub-menus within each category allow selection of calibration parameters, calibration types, calibration methods, line types, and test port connectors.
Previous
• MANUAL CAL Menu - 4-Port VNAs
Navigation
• MAIN | Calibration | CALIBRATION | Calibrate | CALIBRATE
 
CALIBRATE Menu - 4-Port VNAs 
Existing Cal Setup
Restores the setup parameters from the last successful calibration procedure, whether an AutoCal or manual calibration. All menu and dialog box settings are returned to their prior settings and the operator can proceed with the calibration procedure as soon as the necessary external device connections are complete.
AutoCal
Select displays the AutoCal menu.
Manual Cal
Select displays the Manual Calibration menu.
 
 
THRU UPDATE Menu - 4-Port VNAs
The THRU UPDATE menu is a completion button menu. When the through update calibration procedure is complete, the button is annotated with a completion checkmark as shown in the figure below
Prerequisites
• The Thru Update button on the MANUAL CALIBRATION menu is not available unless a Full 4-Port, Full 3-Port, Full 2-Port, or a 1 Path-2 Port calibration has been successfully completed.
• The number of Thrus and the Thru pairs presented depends on the user-defined calibration configuration.
Previous
• MANUAL CAL Menu - 4-Port VNAs
Navigation
• MAIN | Calibration | CALIBRATION | Thru Update | THRU UPDATE
 
THRU UPDATE Calibration Menu – 4-Port VNAs
1. Starting THRU UPDATE calibration menu for 4-Port VNA system. The Done button is unavailable. The number of thrus and the thru pairs presented depends on the user configuration before the calibration and thru update.
2. At right, the completed THRU UPDATE calibration menu for 4-port VNA system on right with completion check marks and Done button available.
 
Define Thru/Reciprocal
Displays the THRU INFO dialog box where the through parameters can be changed.
• THRU INFO Dialog Box - 4-Port VNAs
Thru
The number of Thru buttons to appear depend on which were selected during the setup. The possible thru selections in a 4-Port system are 1-2, 1-3, 1-4, 2-3, 2-4, and 3-4. In the example menu above, all available 4-Port Thru measurements are required.
Done
When all calibrations are successfully completed, the Done button is available. Select returns to the CALIBRATION menu and the Cal Status button is set to ON.
• CALIBRATION [TR] Menu - 4-Port VNAs
Abort Thru Update
Abort Thru Update stops the current calibration procedure and returns to the CALIBRATION menu.
CALIBRATION [TR] Menu - 4-Port VNAs