HP 8753E manual Measurement Error-Correction, Conditions Where Error-Correction is Suggested

Measurement Error-Correction

The accuracy of network analysis is greatly influenced by factors external to the network analyzer. Components of the measurement setup, such as interconnecting cables and adapters, introduce variations in magnitude and phase that can mask the actual response of the device under test.

Error-correction is an accuracy enhancement procedure that removes systematic errors (repeatable measurement variations) in the test setup. The analyzer measures known standard devices, and uses the results of these measurements to characterize the system.

Conditions Where Error-Correction is Suggested

Measurement accuracy and system characteristics can be affected by the following factors:

nAdapting to a different connector type or impedance.

nConnecting a cable between the test device and an analyzer test port.

nConnecting any attenuator or other such device on the input or output of the test device.

If your test setup meets any of the conditions above, the following system characteristics may be affected:

namplitude at device input

nfrequency response accuracy m directivity

ncrosstalk (isolation)

nsource match

nload match

Types of Error-Correction

Several types of error correction are available that remove from one to twelve systematic errors. The full Z-port correction effectively removes all twelve correctable systematic errors. Some measurements do not require correction for all twelve errors The following table explains each correction and its uses.

64 Optimizing Measurement Results