Agilent Technologies E6000C User Manual page 53

1 Getting Started
Wavelength
Measurement Mode
Automatic setting
Scatter Coefficient
Refractive Index
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• Wavelength: laser wavelength. This is only meaningful
if you have a dual-wavelength OTDR module. The
available wavelengths depend on how your module has
been configured.
• Meas. Mode: The Measurement Mode: Realtime to
update the settings while making a measurement,
Averaging to reduce noise level (normal OTDR
measurement mode), or Continue to continue
averaging a measurement that you have stopped.
• Auto: Automatic setting. This calculates appropriate
values for Pulsewidth and Range.
Use Automatic settings if you do not know the length of
your fiber. You can then find the length of the fiber,
change the settings and repeat the measurement.
When you select Auto, the Range and PulseWidth are
set to Auto, and suitable values are chosen by the Mini-
OTDR.
• Scatter.Coeff.: the scatter coefficient, or how
much light will be scattered back in this fiber. This
affects the value of return loss and reflectance
measurements.
• Refr. Ind.: the Refractive index, which describes the
relationship between the speed of light in a vacuum
and within a given medium. The Refractive Index
influences the distance scale of the OTDR.
The Refractive Index can be set to any value between
1.0 and 2.0.
E6000C Mini-OTDR User's Guide, E0302
The Settings screen