The Exfo FTB-150 is a compact optical time-domain reflectometer (OTDR) engineered for field-based fiber optic network testing. This lightweight, rugged platform delivers multi-wavelength OTDR capability across singlemode and multimode fiber infrastructure, featuring fast acquisition, advanced sunlight-readable display technology, and user-centric field operations design.
Technical Specifications
Wavelength Support:
• Singlemode (SM): 1310 nm, 1490 nm, 1550 nm, 1625 nm
• Multimode (MM): 850 nm, 1300 nm
• Up to four wavelengths per module configuration
Dynamic Range (Module-Dependent):
• FTB-150-QUAD (MM/SM): 850 nm: 26 dB | 1300 nm: 25 dB | 1310 nm: 36 dB (35 dB) | 1550 nm: 35 dB (34 dB)
• FTB-150-MM (MM): 850 nm: 27 dB | 1300 nm: 26 dB
• FTB-150-ACCESS (SM): 1310 nm: 35 dB | 1550 nm: 34 dB
• FTB-150-FTTx (SM): 1310 nm: 38 dB | 1550 nm: 37 dB (alternate config: 1310 nm: 38 dB | 1490 nm: 34 dB | 1550 nm: 37 dB)
• FTB-150-METRO (SM): 1310 nm: 40–41 dB | 1550 nm: 38–40 dB | 1625 nm: 38 dB (optional)
• FTB-150-LH (SM): 1310 nm: 45 dB | 1550 nm: 43 dB (typical, NZDSF)
Dynamic range decreases with shorter pulse widths: 2 dB reduction at 10 µs, 1 dB reduction at 20 µs.
Dead Zones:
• Event Dead Zone: ≤ 1 m (SM/MM)
• Attenuation Dead Zone: 3 m or 4.5 m (measured at 5 ns–10 ns pulse, ≤ -45 dB reflectance SM, ≤ -35 dB MM)
Acquisition & Resolution:
• Pulse Widths: 5 ns to milliseconds
• Sampling Resolution: Down to 4 cm
• Sampling Points: Up to 128,000
• Acquisition Time: 45 seconds (full averaging); down to five seconds typical
• Multi-minute averaging supported (three-minute averaging at SNR = 1)
– Key Features
• Multi-wavelength platform accommodating diverse fiber types
• Portable, ruggedized form factor for demanding field environments
• event dead zone performance (1 m)
• Fast acquisition and processing speeds
• Sunlight-readable display for outdoor testing
– Typical Applications
• Access and metro network deployment
• FTTx infrastructure commissioning and maintenance
• Long-haul singlemode fiber characterization
• Multimode backbone testing
– Compatibility & Integration
FTB-150 modular platform supports field-swappable OTDR configurations, enabling wavelength and dynamic range optimization for specific network types and fiber classes.


















