User's Manual
ModuLite™ Installation Guide OPTICAL TEST PROCEDURE
Foxcom Wireless Confidential and Proprietary Information
Document No. 43-93-005-05 X1 55
Light from the cable can be split or combined, using a Coupler. Couplers split light with
minimal loss, from one to two fibers or combine light from two fibers into a single fiber.
8.3. Foxcom Wireless System Characteristics
The ModuLite
™
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 Foxcom Wireless
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 9) 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. Following the
completion of the insertion loss test, the return loss test determines the optical signal power that
returns to the laser. The return power affects the laser, changing the laser’s base current.
8.3.1. Test Equipment
In order to perform these tests, the following equipment is necessary:
• Light source (for wavelength 1310nm , 0dbm)
• Optical power meter
• Optical coupler (hosed and connectorized)
• Fiber optic jumper
• Adapter parts for the cable connectors
For information about equipment suppliers, contact Foxcom Wireless.