5-20 ES User’s Guide
Optimizing Measurements
Compensating for Phase Shift in Measurement Setups
Electrical Delay
Another type of reference plane extension is ,
accessible from the key. Electrical delay lets you add delay to
your current measurement to compensate for phase shift. To flatten the
phase response at a certain frequency, use
. This automatically
adjusts the electrical delay to compensate for the phase slope at the
active marker position.
Electrical delay is commonly used in transmission measurements to
measure a device’s electrical length, or to remove phase slope to measure
deviation from linear phase.
Unlike port extension, electrical delay does not automatically adjust the
applied delay when you switch between transmission and reflection
measurements. For this reason, port extensions are preferred over
electrical delay for fixture compensation or when measuring one-port
devices.
NOTE Reference plane extension only affects measurements using the
narrowband detectors.
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