User`s guide

Performance Tests Performance Tests
62 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
Relative Uncertainty due to Interference
(Optional Test)
Refer to Figure 14 for a test setup to verify the relative uncertainty due to
interference within the optical head optical assembly. In order to perform
the relative uncertainty due to interference test, it is mandatory to use two
mainframes, since the time difference between measurement A und B for
a specific wavelength point has to be no greater than 2 ms. Due to this
short measurement interval, the performance test of the Relative
Uncertainty Due to Interference can only be performed under computer
control.
The performance test "Relative Uncertainty due to Interference" is
optional, since the interference is given with the production of the unit by
mechanical and optical cavities and is unchanged by normal use of the
sensor module.
NOTE