E5071C
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Full 3-Port Calibration
• Overview
• Procedure
Other topics about Basic Calibration
Overview
In full 3-port calibration, calibration data are measured by connecting an
OPEN standard, a SHORT standard, or a LOAD standard to three desired
test ports (or a THRU standard between three 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 × 3 ports = 9). 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 × 6 combinations = 18).
Therefore, in total, 27 error terms are involved in a full 3-port calibration.
1. System Z0 should be changed to 1 ohm before calibration when
using waveguide calibration kit and measuring waveguide
devices.
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