EXFO OTDR 2 - Manual (Page 183)

Technical Specifications
OTDR 175
MAX-720B
MAX-720B
TECHNICAL SPECIFICATIONS M
AX
T
ESTER
720B
Display 7 in (178 mm) outdoor-enhanced touchscreen, 800 x 480 TFT
Interfaces Two USB 2.0 ports
RJ-45 LAN 10/100 Mbit/s
Storage 2 GB internal memory (20 000 OTDR traces, typical)
Batteries Rechargeable lithium-polymer battery
12 hours of operation as per Telcordia (Bellcore) TR-NWT-001138
Power supply Power supply AC/DC adapter, input 100-240 VAC, 50-60 Hz, 9-16 V DCIN 15 Watts minimum
Wavelength (nm) b 1310/1550
Dynamic range (dB) c 36/34
Event dead zone (m) d 0.8
Attenuation dead zone (m) e 3.5
Distance range (km) 0.1 to 260 km
Pulse width (ns) 5 ns to 20 us
Linearity (dB/dB) ±0.03
Loss threshold (dB) 0.01
Loss resolution (dB) 0.001
Sampling resolution (m) 0.04 to 5
Sampling points Up to 256 000
Distance uncertainty (m) f ±(0.75 + 0.0025 % x distance + sampling resolution)
Measurement time User-defined (60 min. maximum)
Reflectance accuracy (dB) ±2
Typical real-time refresh (Hz) 3
Laser safety 1M
Notes
a. All specifications valid at 23 °C ± 2 °C with an FC/APC connector, unless otherwise specified.
b. Typical.
c. Typical dynamic range with longest pulse and three-minute averaging at SNR = 1.
d. Typical, for reflectance above –55 dB, using a 5-ns pulse.
e. Typical, for reflectance below –55 dB, using a 5-ns pulse. Attenuation dead zone at 1310 nm is 4.5 m typical with reflectance below –45 dB
f. Does not include uncertainty due to fiber index.