EXFO OTDR 2 - Manual (Page 190)

Technical Specifications
182 OTDR
FTB-720
FTB-720
TECHNICAL SPECIFICATIONS
Wavelength (nm) b 850 ± 20, 1300 ± 20, 1310 ± 20, 1550 ± 20, 1625 ± 15 (filtered)
Dynamic range (dB) c, d 27, 26, 36, 34, 34
Event dead zone (m) e 0.8
Attenuation dead zone (m) e 4, 4.5, 5, 5, 5
Distance range (km)
Multimode: 0.1, 0.3, 0.5, 1.3, 2.5, 5, 10, 20, 40
Singlemode: 1.25, 2.5, 5, 10, 20, 40, 80, 160, 260
Pulse width (ns)
Multimode: 5, 10, 30, 50, 100, 275, 500, 1000
Singlemode: 5, 10, 30, 50, 100, 275, 500, 1000, 2500, 10 000, 20 000
Launch conditions f Encircled Flux (EF) compliant i
Linearity (dB/dB) b ±0.03
Loss threshold (dB) 0.01
Loss resolution (dB) 0.001
Sampling resolution (m)
Multimode: 0.04 to 2.5
Singlemode: 0.04 to 5
Sampling points Up to 256 000
Distance uncertainty (m) g ±(0.75 + 0.0025 % x distance + sampling resolution)
Measurement time User-defined (60 min. maximum)
Typical real-time refresh (Hz) 3
Stable source output power (dBm) h –3 (1300 nm), –7 (1550 nm)
SPECIFICATIONS a
NOTES
a. All specifications valid at 23 °C ± 2 °C with an FC/PC connector, unless otherwise specified;
APC connector for FTB-720 singlemode model.
b. Typical.
c. Typical dynamic range with longest pulse and three-minute averaging at SNR = 1.
d. Multimode dynamic range is specified for 62.5 μm fiber; a 3 dB reduction is seen when testing
50 μm fiber.
e. Typical dead zone for multimode reflectance below –35 dB and singlemode reflectance below
–45 dB, using a 5 ns pulse.
f. For multimode port, controlled launch conditions allow 50 μm and 62.5 μm multimode fiber testing.
g. Does not include uncertainty due to fiber index.
h. Typical output power is given at 1300 nm for multimode output and 1550 nm for singlemode output.
i. Compliant with Encircle Flux TIA-526-14-B and IEC 61280-4-1 Ed. 2.0 using an external
EF conditioner (SPSB-EF-C-30) and Class CPR 1 or 2 if used without.