Viavi 8100 V2 Series User Manual page 144

Chapter 3 Reflectometry measurements
Enterprise-SLM Software option (T-BERD/MTS-6000A V2 only)
Laser
The acquisition will be carried out on the wavelength(s) selected (for multiple-wave-
length modules). In case of a multi-wavelength module, select All to perform a measure-
ment for all the wavelengths available (this parameter visible exclusively on modules
with one single OTDR port). The possible values depend on the module used.
Index of refraction
Choice of group refraction index of the whole fiber.
User
Predefined
Scatter coefficient
Define the scatter coefficient of the fiber. See OTDR chapter
page 40.
Launch Cable End / Receive Cable Start
No
Evt 1, 2, 3
Length
108
Define for each wavelength (1310 SM, 1360-1510 SM, 1550 SM,
1625 SM) a refraction index of 1.30000 to 1.69999. The selection of
an index alters the value of the section AB (actual distance between
cursors A and B).
or,
If the actual distance between the cursors A and B is known, enter its
value under Section AB to establish the index of the fiber. Selection
of this distance causes the display of the indices. The extreme
distance values are given by the index values (1.30000 à 1.70000).
It is possible to choose one of the predefined values given for certain
cables. The corresponding indices given in the table below are
repeated on the screen. See OTDR chapter,
page 39.
All the results are displayed and referenced on the basis of the board
of the module.
The results relating to the launch cable are eliminated from the table.
Attenuation and distances are then measured on the basis of the
marker Evt 1, 2 or 3 selected.
Use the Edit Number
164.042 kfeet / 31.075 miles) or affect the active cursor value, using
the Set Cursor Distance
User Manual
key to enter a distance (Min= 0 / Max=50 km /
key.
78000010220 Rev. 024
"Index of refraction" on
"Scatter coefficient" on