S820E Microwave Site Master™ User Guide : Calibration, CAA : Calibration Setup
 
Calibration Setup
In order to perform a proper calibration, several parameters must be set before the calibration procedure is started. These parameters are: Cal Type, Cal Line, Port DUT, and Port Cal Kit.
To view a summary of these settings, begin from the Calibration main menu and press Cal Info. A summary of the Active Cal Settings and the Current Settings of the instrument are displayed (see Figure: Cal Info Window). Press Esc to close the Cal Info window.
Cal Info Window
The Cal Info window displays all of the key setup parameters for the calibration. The current settings are shown on the left, and the settings of the instrument at the time of the last calibration are shown on the right.
 
Cal Type
Various calibration types are available for the Site Master S820E. The calibration type must be chosen based on the measurement that is required. Figure: Cal Setup Window Showing Cal Type Selection Table shows the dialog box with the Cal Type selection table.
Cal Setup Window Showing Cal Type Selection Table
Table: Measurement Errors Corrected by Calibration  (1 of 2) lists in more detail what types of measurement errors each of these calibration types corrects.
Measurement Errors Corrected by Calibration  (1 of 2)
Calibration Type
Measurement Errors Corrected
RFP1: Full Reflection – Port 1
Full Reflection – Port 1 calibration is used to correct for all errors when making reflection measurements at port 1 (for example, Return Loss, VSWR, Cable Loss, or DTF).
This cal type requires three connections to Port 1: Open, Short, Load
2PFP: 1-Path 2-Port – Fwd Path
1-Path 2-Port – Fwd Path calibration is used to correct for all errors when making reflection measurements at port 1 and transmission measurements between ports 1 and 2.
This cal type requires four connections to Port 1: Open, Short, Load, Thru (between Port 1 and 2). The Isolation step, using a load connection on each port, is optional. If used, it will improve the dynamic range performance of the Thru measurement.
RRP1: Reflection Response – Port 1
Reflection Response – Port 1calibration is a quick method used to correct for some errors when making reflection measurements at port 1.
This cal type requires one connection to Port 1: Open or Short. The load connection is optional, but if used, will improve the effectiveness of this calibration.
TRFP: Transmission – Fwd Path
Transmission Response – Fwd Path calibration is a quick method used to correct for some errors when making transmission measurements between ports 1 and 2.
This cal type requires one connection: a Thru connection between Port 1 and Port 2.
2PES: 1-Path 2-Port – Fwd path
(Ext. Sensor)
1-Path 2-Port – Fwd Path (Ext. Sensor) calibration is used to correct for errors when making reflection measurements at port 1 and transmission measurements between port 1 and an external USB sensor.
This cal type requires four connections to Port 1: Open, Short, Load, Thru (between Port 1 and the external USB sensor).
TRES: Transmission – Fwd Path
(Ext. Sensor)
Transmission Response – Fwd Path (Ext. Sensor) calibration is used to correct for errors when making transmission measurements between port 1 and an external USB sensor.
This cal type requires one connection: a Thru connection between Port 1 and the external USB sensor.
 
Cal Line
The Site Master S820E supports measurements and calibrations for both coaxial and waveguide media. In the Cal Setup window, set the Cal Line to either Coax or Waveguide before starting the calibration.
Figure: Cal Line Selection shows the selection window for the Cal Line, within the Cal Setup dialog box. For coaxial line types, the calibration method that is used is the Open, Short, Load method, or OSL. For waveguide line types, the calibration method that is used is the Offset Short 1 (1/8th wavelength), Offset Short 2 (3/8th wavelength), Load method, or SSL.
Cal Line Selection