Agilent Technologies 8163A User Manual page 316

Specifications and Regulations Compliance
The Agilent 8163A/B Lightwave Multimeter, the Agilent 8164A/B
Lightwave Measurement System, and the Agilent 8166A/B Lightwave
Multichannel System are produced to the ISO 9001 international
quality system standard as part of Agilent Technologies' commitment
to continually increasing customer satisfaction through improved
quality control.
Specifications describe the instrument's warranted performance.
Supplementary performance characteristics describe the instrument's
non-warranted typical performance.
Because of the modular nature of the instrument, the performance
specifications apply to the modules rather than the mainframe unit.
The specifications for a module are supplied with that module.
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Agilent 8163A/B, 8164A/B, and 8166A/B User's Guide, Fourth Edition