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SHENZHEN TRANSCOM TECHNOLOGY LIMITED / 303, Building 4, Fantasia MIC Plaza,Nanshan District,Shenzhen,China.
Tel: +86 755 88278677 / Fax: +86 755 26029402 / Web: www.sz-transcom.com
3.
If the instrument is damaged or in performance reduction caused by irresistible external factors,
they will not be within the warranty scope.
4.
If the instrument is damaged or in performance reduction caused by improper operation, they
will not be within the warranty scope.
5. Users are forbidden to dismantle this instrument without the permission of the company
or designated authorized entity; otherwise, it will lose the qualification of warranty
permanently!
Return of Instrument
If the product needs to be returned due to product calibration or other reasons, please contact your
supplier in advance and briefly explain the reasons for product return, so as to provide effective and
timely services for you.
When returning your product, please notice that:
Pack the instrument with polyethylene and other soft thin cushion to protect the completeness of
the instrument shell;
Please use the original hard packing box. If other package is used, ensure that there is at least 3
mm thick of soft object around the instrument;
Fill out the warranty card correctly, including the company name, address, contact person, contact
phone, problem description, etc.;
Deliver the products to the supplier’s agent in a reliable way.
Chapter 2
Basic Operation of 5302 OTDR
1. Introduction
OTDR is a precise optical measuring instrument made according to the backscatter principle of Rayleigh
scattering and Fresnel reflection when the transmission of laser in the optical fiber. It can be widely used in
the installation and construction, maintenance and repair and monitoring application of optical fiber and
fiber cables. It can be used to measure the length, attenuation, connection quality and fault location of
optical fibers and cables, etc..
When transmission of light in the optical fiber, the optical pulses in the optical fiber transmission will
generate Rayleigh scattering due to the defects of optical fiber and non-uniformity of the mixed components.
Of which, a part of light signal will be scattered back along the direction opposite to the incident pulse,
therefore, it is called backward Rayleigh scattering. Through observing the intensity changes of backward
Rayleigh scattering light signal, the loss distribution, connection quality and other features of optical fibers
and cables can be accurately measured. Besides, according to the theory of optical transmission, when the
light encounters the boundary of the two transmission media of different refractive indices in the
transmission process (for example, connectors, mechanical connection, fracture or optical fiber termination
points), Fresnel reflection phenomenon may occur. Through receiving the Fresnel reflection signal on
regular basis, the position of the discontinuity points along the length of the optical fiber can be accurately
determined. The size of reflection depends on the refractive index difference and boundary surface flatness.
