MobileAccess 1000 System, Руководство по установке и настройке

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MobileAccess™ 1000/1200 Appendices
UM-1000, Revision 2.2 27
Chapter 4.
Appendices
4.1 Appendix I: Optical Test Procedure
This section describes the methods applied to test fiber optic cable’s optical insertion
loss and return loss.
4.1.1 Fiber Optic Cable Test
Due to the extended distances that analog signal transmissions travel on cable, the
major challenge is to determine the status of the cable.
In order to determine that the cables are functioning, technical personnel need to
perform optical power tests.
The optical power tests covered in this document are:
•
Optical insertion loss measurement test
•
Optical return loss measurement test
4.1.2 MobileAccess System Characteristics
The MobileAccess™ system consists of the following characteristics:
•
Singlemode fiber
•
Wavelength 1310nm
•
Fiber Optic Cable Measurement Tests
Cable can be measured through several procedures. This document describes the
following tests:
•
Optical insertion loss measurement test
•
Optical return loss measurement test
These tests are intended to be performed by technical personnel that deal with
MobileAccess systems. Other equipment can be used to perform these tests,
however the results have to be the same as will appear in the fiber optic cable test
results table (Table
4-1), at the end of this document.
The insertion loss measurement determines whether the optical signal power
traveling the cable length is strong enough to be received by the photo diode, in the
receiver.