Chapter 3 Measurement
3-2
3.1 Calibrating Before Measurement
Calibrating this equipment before measurement assures that it meets the
performance standards.
After turning on the power for at least 2 hours, the following items are
calibrated before measurement. During warm-up, execute Repeat
sweeping with Span of 100 nm or more and VBW of 10 kHz or more.
In addition, if the usage environment experiences sudden changes in
temperature, etc., such as during or after equipment transport, perform
calibration after allowing sufficient time for the equipment to reach
equilibrium with the room temperature and humidity.
Measured wavelength changes with changes in the internal temperature
and humidity of the instrument. Consequently, recalibrate the
instrument if either the ambient temperature or humidity changes.
The calibration functions of this equipment are listed below.
Table 3.1-1 Calibration Functions
No Calibration Items Where: Button Description
Alignment of
Optical System
Automatically aligns optical axis. Execute as
described below:
● Allow the equipment to warm-up for at least
2 hours after power-on.
● Calibrate whenever the equipment is
transported or moved between different
locations.
● Calibrate whenever the ambient temperature
or air pressure changes significantly.
Calibration
(External optical
light source)
Wavelength calibration is performed using an
external light source.
Align the optical axis before performing
Calibration
(MS9740B-002)
Wavelength calibration is performed using a
light source of option 002.
When Align with cal is On, automatically aligns
the optical axis using the light source before
Calibration
Initializes the wavelength calibration data.
Resolution
Measures, recalculates and calibrates effective
resolution for current measurement conditions.
Align the optical axis before calibrating the
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