Viavi MTS 4000 Base Unit, Руководство пользователя

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Chapter 5 Power meter, VFL (Visual Fault Locator) and Talkset
VFL Function
User Manual 77000000206 Rev. 007 73
VFL Function
VFL connector
The type of optical connector used for the VFL source is UPP (Universal
Push Pull), which is compatible with all diameter 2.5 mm connectors (FC,
SC, ST, DIN, E2000, etc.)
See Figure 33 on page 67 to visualize the VFL connector.
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:
– Connect the fiber to the VFL port on the connectors panel (see
Figure 33 on page 67 )
– Press the
H
OME
key
,
then press <- and -> to select the VFL icon
and confirm by pressing the
E
NTER
key.
– You can configure the signal mode in the System Settings page >
Utility > VFL Mode (see “VFL Mode” on page 54 ).
Selection of this option is compatible with another function (OTDR, etc.).
Storing and reloading results
File Setup
Click on the button F
ILE
to access the File setup. See the chapter «File
management» in the user manual «4100 modules series» for a complete
description of all parameters, options and 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 :
NOTE
Identification is facilitated by the blinking of light in the fibre.