ShinewayTech MTP-200 Series - Common Using Parameters for OTDR Testing; OTDR Test Parameters Configuration

MTP-200 Series User’s Manual
Shineway Technologies, Inc. - 34 -
and gets more ideal test result.
Correct parameters setting is the essential condition of optical fiber accurate measurement.
So, when test manually, must set parameters according 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
Pulse Width
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
Tab. 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 [Setup] 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 according 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.