Grandway Optical Instruments Series User Manual

1
2
Distance(x)
O
TDR s
ig
nal
Splice loss
Fresnel reflection
LD and Pulse generator
Signal processor
Photo-detector
launch
OTDR instrument
1
2
Back scattering light
Light pulse
Optical fiber
Splicing point
Breaking point
Display
FHO5000
14
Formula of the distance: distance = (c/n)*(t/2).
Here: c is the light speed traveled in vacuum(2.998*108m/s).
T is the delay between launching pulse and receiving pulse.
N is the refraction ratio of the testing fiber(specified by manufacturer).
When display the whole trace, each point of the trace represents the average value of several sampling points. By zoom in
and zoom out function, the value of each sampling point can be got.
Working Principle of OTDR

Grandway Optical Instruments Series Specifications

General

Brand	Grandway
Model	Optical Instruments Series
Category	Measuring Instruments
Language	English