5-6
U
SER
M
ANUAL
750000992/16
Using an OTDR module
MTS
e
- or select a predefined value : press the <Preset Index>
softkey and select (using the «
<
«and «>» arrows keys) one
of the cable. See in the following table the index for each
cable type. Once a cable has been selected, press the
<Confirm Index> softkey to validate it.
Preset index values
Section A_B
:
Enable the index N calibration, the distance between the
cursors A and B being known. Selecting this known
distance will display the index of the fiber. The limits of the
distance are given by the index (1.30000 to 1.70000).
Scatter Coeff.
:
Choose the backscattered coefficient K from -99 dB to -50
dB in 0.1 dB steps. Modification of K modifies the
reflectance and ORL measurements. The default values are
given in "Reflectance" on page 1-2.
Acquisition
The MTS
e
provides three distinct methods of making an acquisition:
❏
A real-time mode, when the MTS
e
makes up to 10 acquisitions per second
and displays the resulting trace on the screen along with a connection status
indicator.
❏
A rapid automatic mode that allows you to make an acquisition with an
automatic configuration process using the minimum of key strokes.
Wavelength (nm)
850
1300
1310
1550
1625
Corning 62.5/125
1.50140
1.49660
Corning 50/125
1.48970
1.48560
SpecTran 62.5/
125
1.49600
1.49100
Litespec
1.46600
1.46700
1.46700
SpecTran SM
1.46750
1.46810
1.46810
Lucent Truewave
1.47380
1.47320
1.47320
Fitel (Furukawa)
1.47000
1.47000
1.47000
Corning SMF-LS
1.47100
1.47000
1.47000
Corning SMF-DS
1.47180
1.47110
1.47110
Corning LEAF
1.46890
1.46840
1.46840
Corning SMF-28
1.46750
1.46810
1.46810
ATT SM
1.46600
1.46700
1.46700
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