EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 80)

Testing Fibers in Template Mode
66 FTB-7000 Series
Acquiring Traces in Template Mode
Acquiring Traces in Template Mode
To acquire traces in Template mode, you must first open your reference
trace in the application.
If you want your reference trace to be more accurate, you can update it
with the new events that might be found.
The application will automatically switch to Template mode once the
reference update is complete, that is, after 15 acquisitions or after you stop
the update manually.
To acquire traces in Template mode:
1. If necessary, clean the connectors (see Cleaning and Connecting
Optical Fibers on page 22) and connect a fiber to the OTDR port.
If your unit is equipped with two OTDR ports, ensure that you connect
the fiber to the appropriate port (singlemode, singlemode live, or
multimode), depending on the wavelength you intend to use.
2. When the application prompts you, select the trace you want to use as
the reference trace. If you do not select it immediately, you will have to
select it manually before starting your test (see Selecting a Reference
Trace on page 74). By default, all wavelengths are selected, but you
can adjust the selection to your needs.
C
AUTION
Never connect a live fiber to the OTDR port without a proper setup.
Any incoming optical power ranging from –65 dBm to –40 dBm will
affect the OTDR acquisition. The way the acquisition will be
affected depends on the selected pulse width.
Any incoming signal greater than –20 dBm could damage your
OTDR permanently. For live-fiber testing, refer to the SM Live port
specifications for the characteristics of the built-in filter.