3-15
IM AQ6373-01EN
Preparing for Measurement
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App
Index
3.6 Wavelength Calibration
Procedure
Wavelength Calibration Using the External Light Source
The user can calibrate the instrument using a third-party light source. However, the
following light sources cannot be used for wavelength calibration.
• If the set wavelength is not the same as that of the calibration light source.
• If the wavelength error of the instrument is outside of ±0.5 nm.
(Readjustment required. Please contact your nearest Yokogawa representative.)
• If the level of the light source used for calibration is -40 dBm or less.
Connecting the External Light Source
1.
Turn the power to the instrument ON.
Press the MAIN POWER
switch and press the
POWER
switch.
For instructions on turning the power ON and OFF, see section 3.3.
2.
Use a single mode optical fiber to connect the external light source’s optical
output connector with the optical input connector.
Light source
Optical fiber
AQ6373
Note
• Use a 5/125 µm single mode optical fiber.
• If a large diameter core optical fiber must be used, choose one with a core diameter of 100
µm or less. Correct wavelength calibration may not be obtained when the core diameter is
larger than 100 µm.