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Chapter 5 Power meter & VFL (Visual Fault Locator)
Storing and reloading results
36 User Manual 7SMART102 Rev002
Visual Fault
Locator
function (VFL)
This function is used to emit a red light signal of frequency 1 Hz or in
continuous mode into a fiber to detect any defects in the dead zone of
the reflectometer, or to identify it.
This function is suitable for short fibers (length < 5 km) or the first few
metres of a long fiber.
To emit a light signal into a fiber:
1 Connect the fiber to the VFL port on the connectors panel.
2 Press the
H
OME
key and activate the VFL
The icons display on the upper banner of the screen.
The signal mode of the VFL can be modified in the System Settings
page, in Utility > VFL Mode parameter.
Storing and reloading results
File Setup
Click on the button
F
ILE
to access the File setup. See the chapter «File
management» in OTDR User Manual for a complete description of all
parameters, options and description of the explorer.
Storing results
In order to save the results of a measurement, click on
F
ILE
and select
Store trace . Two files are being saved:
– The first file is used with the SmartOTDR and allows to retrieve all
measurement results. It is saved with the extension «.Lts».
– The second file is a ASCII file using tabulations to separate values.
It is saved with the extension «.txt» and can be opened by the Smar-
tOTDR. It has been designed to be used with a spreadsheet
program on a PC where it allows to retrieve all measurement results
and format them in a nice customized table.
Loading results
In order to load the results of a measurement, select a file with the
extension «.Lts» in the file explorer (see the chapter «File management»
in the user manual for OTDR application), click on
Load .
The LTS tab is displayed with the loaded results in the table.
NOTE
Identification is facilitated by the blinking of light in the fiber.