HP 83487A, User Manual, Page: 42 / 98

3-6
Calibration Overview
Factory Calibrations
If the
Current Frame
∆
Temp
listing is greater than ±5
°
C, then the main-
frame should either be calibrated at the current operating temperature or be
placed in an ambient air temperature that is within 5
°
C of the temperature of
the current calibration.
O/E Factory Wavelength Calibration
Optical/electrical (O/E) factory wavelength calibration, compensates for the
photodetector responsivity. The accuracy of all optical channel measurements
is dependent on proper O/E calibration. O/E calibrations should be performed
annually. Most customers return their optical plug-ins to an authorized HP ser-
vice center for this calibration at the same time they are having their main-
frames re-calibrated.
The HP 83480-series optical modules have one or two standard wavelengths
(850 nm or 1310/1550 nm). The O/E Calibration function allows you to cali-
brate the instrument for use at one additional user-defined wavelength. This
calibration does not affect the factory calibrations. See the following section
on User Calibrations for additional information on this procedure.