Full 4-Port Calibration - Agilent Technologies E5071C Manual

Full 4-Port Calibration

Overview
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Procedure
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Other topics about Basic Calibration
Overview
In full 4-port calibration, calibration data are measured by connecting an
OPEN standard, a SHORT standard, or a LOAD standard to the four test
ports (or a THRU standard between the four ports). This calibration
effectively eliminates the directivity error, crosstalk, source match error,
load match error, frequency response reflection tracking error, and
frequency response transmission tracking error from the test setup in a
transmission or reflection test using those ports. As in full 2-port
calibration, this calibration method also makes it possible to perform
measurements with the highest possible accuracy. There are unique error
terms for directivity, source match, and reflection tracking for each
stimulus test port (3 × 4 ports = 12). As for isolation, load match, and
transmission tracking errors, there are unique terms for each combination
between a stimulus port and a response port (3 × 12 combinations = 36).
Therefore, in total, 48 error terms are involved in a full 4-port calibration.
1. System Z0 should be changed to 1 ohm before calibration when
using waveguide calibration kit and measuring waveguide
devices.
Procedure
Measurement
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