Manual Measurement; Typical Specifications - Viavi T-BERD/MTS 2000 User Manual

• Display threshold of faults:
- 0 to 5.99 dB in steps of 0.01 dB for event thresholds
- -11 to -99 dB in steps of 1 dB for the reflectance
- 0.01 to 5.99 dB in steps of 0.01 dB for attenuation
• Display of slope and attenuation for a segment of fiber.
• Display of the position of a fault and of attenuation.
• Display of the reflectance of the fault.
• Display of ORL

Manual Measurement

• Measurement of slope between the cursors.
• Measurement of attenuation between two segments of fiber.
• Measurement of reflectance of a reflecting element.
• Measurement of ORL between the two cursors.
• Measurement of splice by 2 or 5 points method

Typical specifications

Typical values, measured at 25°C unless specified.
Multimode OTDR Module
Central Wavelength
Typical RMS Dynamic Range
Distance Range
Pulse width
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 averag-
ing, 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 reflec-
tance, at shortest pulse width.
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User Manual
Chapter 13 Technical specifications
OTDR modules for T-BERD/MTS 2000/4000 V2
77000010208 Rev. 012
41XXMM
850 / 1300 nm ± 30 nm
26 / 24 dB
Up to 80 km
3 ns to 1 µs
0.8 m
4 m
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