Chapter 14 - Visual Fault Locator (Vfl); Introduction; Using The Visual Fault Locator - Deviser SitePROFILER User Manual

E7000L SitePROFILER
Handheld Cable/Antenna Analyzer
Chapter 14 — Visual Fault Locator (VFL)

Introduction

The E7000L SitePROFILER's Visual Fault Locator function enables visual confirmation of equipment faults
without having to carry a separate piece of test equipment. This function provides a tightly-focused beam
of red light, enabling you to check for damaged, broken, or spliced optical fibers and high-loss connectors
(particularly important in short fiber lengths, where an OTDR cannot detect the fault). VFL can also trace
the patch of fiber through multiple connections and identify the correct two fibers for loss testing.
NOTE: The beam emitted by the VFL can cause vision damage. For your safety, do not look directly at
the light beam for extended periods of time.
Enter this mode by pressing the Menu button to the top-right of the display, then selecting the VFL icon.
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Using the Visual Fault Locator

The following is a step-by-step guide to using the VFL option of the E7000L SitePROFILER cable analyzer.
Procedure:
1. On the SitePROFILER's top panel, locate the VFL emitter port marked with the following symbol.
2. Unscrew the chained metal cap covering the port and leave it aside. Be careful not to look directly
into this port while using the instrument.
3. To set the instrument in the VFL mode, press the Menu button to view the measurement mode
desktop. Tap the VFL softkey.
4. The VFL main menu will automatically appear to the right side of the display.
a. Tap OFF to disable the light. The displayed lightbulb icon will turn white.
b. Tap ON to activate the light, which will shine continuously. The lightbulb icon will turn red.
c. Tap 1 Hz Flashing to automatically switch the light on and off at about 1 flash per second.
d. Tap 2 Hz Flashing to automatically switch the light on and off at about 2 flashes per second.
5. Connect the fiber to the port. Visible light will leak through the sheath, highlighting cracks or bends.
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