AD1000 User’s Manual
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Correct parameters setting is the essential condition of optical fiber accurate
measurement. So, when test manually, must set parameters accord to requirements.
9.1 Common using parameters for OTDR testing.
Following testing parameters displaying on {Meas. Para.} option card on the OTDR
surface, users can set conveniently
Parameter
Definition
Range
Distance range of the testing
Pulsewidth
The width of laser pulse launched to optical fiber by OTDR
Averaging Time
Testing time, choose the proper testing time
Wavelength
Laser wavelength, testing laser wavelength selecting
Mode
Testing mode, testing mode selecting
Table 9.1 OTDR common use parameters sheet
9.2 OTDR test parameters Configuration
Testing parameters in this section should be set in “OTDR Setting“, click [
] on the
OTDR surface to enter.
These testing parameters include: Optical fiber general setting, analysis parameters
setting and etc.
Parameter
Definition
IOR
IOR of optic fiber which affects the transmission speed
of laser. Need to set separately accord to working
wavelength relatively
Scatter Coefficient
Also be called back scatter, which affects backward
scatter power of laser in fiber
Non Reflection
Threshold
Also be called splice loss detecting threshold. Non
reflection event with insertion loss greater than this
threshold will be displayed on trace
Reflection Threshold
Also called reflectivity. Reflection events with insertion
loss greater than this threshold will be displayed on
trace
End Threshold
Also be called optical fiber end detecting threshold.
The first event with insertion loss greater than this
threshold is identified as the end of fiber, and all
following events will be ignored on trace.
Default
Revert to the values when leave factory
Table 9.2 OTDR test parameters setting sheet
