Factory Calibrations - Agilent Technologies 83487A User Manual

Table 3-1. Factory Calibration Summary
Calibration What is calibrated
Mainframe Accuracy and
Calibration continuity of the
timescale
O/E Factory The photodetector
Wavelength responsivity
Calibration
a. Refer to "O/E User-Wavelength Calibration" on page 3-9.
Calibration Overview

Factory Calibrations

Factory Calibrations
The following calibrations are performed at the factory:
Mainframe Calibration
O/E Factory Wavelength Calibration
Measurements
Affected
Channels affected:
optical & electrical. All
time base
measurements such as
rise time, fall time, eye
width, and jitter.
Channels affected:
optical. Amplitude
accuracy of all optical
channel
measurements. Optical
power meter accuracy.
Mainframe Calibration
Mainframe calibration affects both optical and electrical measurements. Main-
frame calibration improves timebase accuracy. All timebase measurements
such as rise time, fall time, eye width, jitter, and so forth are affected by the
timebase accuracy.
The calibration factors are stored in the nonvolatile RAM of the instrument.
There is a switch on the back panel of the instrument that allows the main-
frame calibration to be protected or unprotected. Next to the switch there is a
drawing that shows each switch's function and protected position. Refer to the
3-4
Recommended
Softkey Path
Interval
Annually at Agilent Utility
service center or if Calibrate
operating temp has Calibrate frame
changed and remains
5°C or more from
calibration
temperature. See
service manual.
Annual factory re-
Not user accessible.
calibration of standard
wavelengths.
a