Chapter 6
Technical specifications
OTDR modules for T-BERD/MTS 2000/4000 V2
User Manual
700MAN201 Rev. 002
107
Multimode and QUAD Modules
RMS Dynamic Range
3
37 dB
36 dB
36 dB
42 dB
40 dB
40 dB
40 dB
45 dB
43 dB
43 dB
42 dB
Distance Range
Up to 260 km
Up to 400 km
Pulse width
5 ns to 20 µs
Event Dead Zone
4
0.7 m
0.65 m
Attenuation Dead Zone
5
3 m
2.5 m
Typical Splitter Attenuation Dead Zone
-
45 m
6
20 m
7
1. Laser at 10 µs and 25° C
2. Laser in CW and 25° C
3. Typical value corresponding to the difference (in dB) between the level of back-diffusion extrapolated
at the beginning of the fiber and the RMS noise level, after 3 minutes of averaging, with the largest
pulse width.
4. EDZ measured at 1.5 dB below the peak of a non-saturated reflecting event at shortest pulse width.
5. ADZ measured at +/- 0.5 dB on the basis of a linear regression from a reflectance of type FC/UPC (-
55 dB) at shortest pulse width.
6. Measured on a 16 dB loss (typical 1x32 split ratio) non-reflective splitter at 1310nm, using 200ns
pulsewidth.
7. Measured on a 16 dB loss (typical 1x32 split ratio) non-reflective splitter at 1310nm, using 100ns
pulsewidth
Singlemode Modules
41xxA
41xxB
41xxC
Multimode / Singlemode OTDR Module
Central Wavelength
1
850 / 1300 nm ± 30 nm
1310 / 1550 nm± 20 nm
Typical RMS Dynamic Range
2
26 / 24 dB
37 / 35 dB
Distance Range
Up to 80 km
Up to 260 km
Pulse width
3 ns to 1 µs
3 ns to 20 µs
Event Dead Zone
3
0.8 m
0.9 m
Attenuation Dead Zone
4 m
4
4 m
5
1. Laser in CW mode, at 25° C
2. Typical value corresponding to the difference (in dB) between the level of back-diffusion extrapolated at the
beginning of the fiber and the RMS noise level, after 3 minutes of averaging, with the largest pulse width
3. EDZ measured at +/- 1.5 dB below the peak of a non-saturated reflecting event at shortest pulse width
4. ADZ measured at +/- 0.5 dB on the basis of a linear regression using a -40 dB type reflectance, at short-
est pulse width.
5. ADZ measured at +/- 0.5 dB on the basis of a linear regression from a reflectance of type FC/UPC (-55
dB) at shortest pulse width, at 1310 nm.
OTDR New IHM rev002.book Page 107 Jeudi, 5. mai 2022 11:50 11
