Testing Fibers
OTDR
43
Testing in Manual (Advanced) Mode
Testing in Manual (Advanced) Mode
You can set distance range, pulse, and duration of the acquisition in this
mode.
Note:
Not all pulse widths are compatible with all wavelengths.
If you intend to test at multimode wavelengths, carefully read
Conditions for Multimode Measurements
To acquire traces in Manual (Advanced) mode:
1.
Clean the connectors properly (see
Cleaning and Connecting Optical
2.
Connect a launch fiber between the device under test and the OTDR
port. If necessary, set the
(see
3.
Press Menu, select
OTDR
, and then press Select.
4.
Use the left/right function arrows until you see
Parameters
, and then
display the pane (F1/F2 key).
If your unit is equipped with two OTDR ports, ensure that you connect
the fiber to the appropriate port (OTDR SM, OTDR MM, or
OTDR SM Live for filtered wavelength).
C
AUTION
Never connect a live fiber to the OTDR SM or OTDR MM port. Any
incoming signal greater than –40 dBm will affect the OTDR
acquisition. Any incoming signal greater than –20 dBm could
damage your OTDR permanently.