Installation Guide

Optical Test Procedure Litenna  Installation Guide
38 Document No.
42-93-005-23D
Foxcom Wireless Proprietary Information
Optical Insertion Loss Measurement Test
The optical insertion loss measurement tests the attenuation of the cable. The insertion
loss’ value should be minimal and remain in scale to 0.4dB/Km.
The insertion loss measurement can be performed in two methods:
• Two point test
• Single point test
Method #1: Two Point Test
Connection description: Light source connected at one end of the cable and an
optical power meter at the other end.
Light
source
Optical
power
meter
Figure 18 – Two Point Test
1. Connect light source directly to the optical power meter.
2. Measure light source signal power, verifying power of 0dBm.
3. Connect light source to cable end.
4. Connect optical power meter to cable at other end.
5. Measure light source signal power using the optical power meter.
6. Calculate the difference between two signals (dB):
(Insertion loss)dB = (Light source signal at one end)dBm – (Measured signal at other end)dBm