The :SENSe{1-16}:CORRection:COLLect:LRL:PORT subsystem commands provide control of Line-Reflect-Line port assignments for FULL3 or FULL4 calibrations. The :LRL:PORT commands require a 4-Port VNA instrument.
LRL Calibration Subsystems
The LRL-related calibration commands are organized into five (5) subsystems in the following sections:
This command requires a 4-Port VNA instrument. Sets the calibration type to a Full 3-Port LRL for the indicated channel using either two 2-Port LRL Calibrations or one LRL 2-Port Calibration with One Singleton. No query.
Full 3-Port LRL Method #1 - Use Two 2-Port Calibrations
The first method requires two LRL FULL2 port calibrations where the calibrations share one common port. Port pairs 1-2 and 3-4 are not allowed. The two calibrations must share a common port or the command results in an error. Valid port pair combinations are:
• Port Pair 1-2 not allowed
• Port Pair 1-3 with Port Pair 1-4
• Port Pair 1-3 with Port Pair 2-3
• Port Pair 1-4 with Port Pair 1-3
• Port Pair 1-4 with Port Pair 2-4
• Port Pair 2-3 with Port Pair 2-4
• Port Pair 2-3 with Port Pair 1-3
• Port Pair 2-4 with Port Pair 1-4
• Port Pair 2-4 with Port Pair 2-3
• Port Pair 3-4 not allowed
The first calibration is referred to as :CALa; the second calibration referred to as :CALB.
The CALa port pair is assigned with the :PORT{13 | 14 | 23 | 24} keyword parameter.
The CALB port pair is assigned with the command <char1> parameter with arguments of:
For example, the command for an LRL FULL3 calibration with the first LRL FULL2 (CALa) on port pair PORT13 and the second LRL FULL2 (CALB) on port pair PORT23 is shown below:
:SENS1:CORR:COLL:LRL:PORT13:FULL3 PORT23
Full 3-Port LRL Method #2 - Use One Two-Port Cal and One Singleton
The second way to perform an LRL FULL3 calibration is to include one LRL FULL2 calibration, a singleton reflection calibration on a different port. The method concludes with measuring a short or an open on the singleton port and one or two through lines on the port pair. Note that Port Pairs 1-2 and 3-4 are not allowed and the Port Pair assignments MUST NOT include the common singleton port. Valid port pairs, singleton, and through line combinations are:
• Port Pair 1-2 not allowed
• Port Pair 1-3 and Singleton 2 (and a through line cal between Ports 1-2 or 2-3)
• Port Pair 1-3 and Singleton 4 (and a through line cal between Ports 1-4 or 3-4)
• Port Pair 1-4 and Singleton 2 (and a through line cal between Ports 1-2 or 2-4)
• Port Pair 1-4 and Singleton 3 (and a through line cal between Ports 1-3 or 3-4)
• Port Pair 2-3 and Singleton 1 (and a through line cal between Ports 1-2 or 1-3)
• Port Pair 2-3 and Singleton 4 (and a through line cal between Ports 2-4 or 3-4)
• Port Pair 2-4 and Singleton 1 (and a through line cal between Ports 1-2 or 1-4)
• Port Pair 2-4 and Singleton 3 (and a through line cal between Ports 2-3 or 3-4)
• Port Pair 3-4 not allowed
An example of an LRL FULL2 calibration on port pair PORT23 and a singleton on PORT4 is shown below. The required through (thru) can be between port 2-4 or 3-4. The through line is thus configured between port 3 and 4:
This command requires a 4-Port VNA instrument. Sets the calibration type to Full Four Port LRL for the indicated channel. In order to achieve a Full4 calibration using LRL techniques, it is necessary to perform two Full2 LRL calibrations on independent port pairs. The port number specified in this command is the port pair for the first LRL calibration. The port pair of the second LRL calibration is made up of the other ports. No query.