Operation Manual

DTX Series CableAnalyzer
Technical Reference Handbook
14-28
DTX Compact OTDR Module Specifications
Specification Multimode Singlemode
Wavelengths 850 nm ±20 nm; 1300 nm +35 nm, -15 nm 1310 nm ±25 nm, 1550 nm ±30 nm
Fiber Under Test 62.5/125 µm or 50/125 µm 9/125 µm
OTDR Port Connector Cleanable ferrule, UPC polish, with
removable SC adapter
Cleanable ferrule, UPC polish, with removable SC
adapter
Max Distance Range
1, 2, 3
850 nm: 6 km, 1300 nm: 20 km 1310 nm: 20 km, 1550 nm: 20 km
Pulse Width (nominal) 850 nm: 20 ns, 40 ns, 100 ns, 200 ns
1300 nm: 20 ns, 40 ns, 100 ns, 300 ns, 1 µs
1310 nm: 20 ns, 40 ns, 100 ns, 300 ns, 1 µs, 3 µs, 10 µs
1550 nm: 20 ns, 40 ns, 100 ns, 300 ns, 1 µs, 3 µs, 10 µs
Dynamic Range
2, 4
850 nm: 24 dB typical with 200 ns pulse
1300 nm: 26 dB typical with 1 µs pulse
1310 nm: 26 dB typical with 10 µs pulse
1550 nm: 24 dB typical with 10 µs pulse
1. Typical fiber attenuation (<2.4 dB/km at 850 nm, <0.7 dB/km at 1300 nm for 50/125 µm fiber; <2.9 dB/km at 850 nm, <0.6 dB/km at 1300 nm
for 62.5/125 µm fiber; <0.35 dB/km at 1310 nm and <0.20 dB/km at 1550 nm for singlemode fiber), with no significant event losses.
2. Typical backscatter coefficients (-68 dB at 850 nm, -76 dB at 1300 nm for
50/125 µm fiber; -67 dB at 850 nm, -74 dB at 1300 nm for 62.5/125 µm fiber;
-77 dB at 1310 nm,-82 dB at 1550 nm for singlemode fiber).
3. End of fiber is greater than 3 dB above the noise floor.
4. SNR=1 method; 3 minute averaging. Subtract 1.56 dB to compare to
Telcordia 98% method. Subtract 3 dB when testing 50/125 µm fiber. Refer to
the plot to the right.
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