Chapter 2
Configuring the reflectometry test
Configuring the test in Expert OTDR
User Manual
700MAN201 Rev. 002
23
Section Length
Define if the distance between the marker of the event and the previous marker must be
indicated in the results table: select
Yes
or
No
.
Index of refraction
Choice of group refraction index of the whole fiber.
User
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 to 1.70000).
or
You can also enter the
Link Length
, if it is known, using the Numeric
keypad.
Predefined
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.
Figure 14
Predefined index values (Single Mode)
Wavelength (nm)
1310 SM
1360 - 1510 SM
1550 SM
1625 - 1650 SM
Generic G652 G657
1.46750
1.46800
1.46800
1.46850
Generic G653 G655
1.46750
1.46800
1.46800
1.46850
ATT SM
1.46600
1.46700
1.46700
1.46700
Corning SMF-28
1.46750
1.46810
1.46810
1.46810
Corning SMF-DS
1.47180
1.47110
1.47110
1.47110
Corning SMF-LS
1.47100
1.47000
1.47000
1.47000
Corning-Leaf
1.46890
1.46840
1.46840
1.46900
Draka SMF
1.46750
1.46800
1.46800
1.46850
Draka Longline
1.46700
1.46700
1.46710
1.46750
Draka Teralight
1.46820
1.46820
1.46830
1.46850
OTDR New IHM rev002.book Page 23 Jeudi, 5. mai 2022 11:50 11