Ranges - Viavi E4123MM User Manual

3
Event Dead Zone
Attenuation Dead Zone
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.

Ranges

Ranges for A and B OTDR Modules
5ns 10ns
100 m x
200 m x
500 m x
1 km x
2 km x
5 km x
10 km x
20 km x
40 km x
80 km
160 km
260 km
30ns 100ns
x x
x x
x x
x x x
x x x
x x x
x x x
x x x
x x x
x x
User Manual
Chapter 5 Technical specifications
OTDR modules for T-BERD/MTS 2000/4000 V2
Multimode / Singlemode OTDR Module
0.8 m
4
4 m
200ns 500ns
x x
x x
x x
x x
x x
x x
x x
700MAN201 Rev. 004
0.9 m
5
4 m
1us 3us 10us
x
x
x x
x x x
x x x
x x x
x x x
20us
x
x
x
x
95