Atec Agilent-PNA Series - Manual (Page 2)

2
Some definitions
All specifications and characteristics apply over a
25 °C ±5 °C range (unless otherwise stated) and 90
minutes after the instrument has been turned on.
Specification (spec.): Warranted performance.
Specifications include guardbands to account for the
expected statistical performance distribution, mea-
surement uncertainties, and changes in performance
due to environmental conditions.
Characteristic (char.): A performance parameter
that the product is expected to meet before it leaves
the factory, but that is not verified in the field and is
not covered by the product warranty. A characteristic
includes the same guardbands as a specification.
Typical (typ.): Expected performance of an average
unit which does not include guardbands. It is not
covered by the product warranty.
Nominal (nom.): A general, descriptive term that
does not imply a level of performance. It is not covered
by the product warranty.
Calibration: The process of measuring known stan-
dards to characterize a network analyzer's systematic
(repeatable) errors.
Corrected (residual): Indicates performance after
error correction (calibration). It is determined by the
quality of calibration standards and how well “known”
they are, plus system repeatability, stability, and noise.
Uncorrected (raw): Indicates instrument perfor-
mance without error correction. The uncorrected
performance affects the stability of a calibration.
Standard: When referring to the analyzer, this includes
all options unless noted otherwise.