The EXFO FOT-300 Optical Loss Test Set is a handheld instrument that integrates a light source and power meter into a single unit for efficient optical power and loss measurement in fiber optic networks. It streamlines field testing, troubleshooting, and network certification through auto-wavelength recognition and distant referencing, eliminating offset nulling in typical measurement scenarios. The FOT-300 supports testing on passive optical networks at ITU-T recommended wavelengths and delivers 260 hours of battery autonomy using either an AC adapter or three AA batteries.
## Technical Specifications
• **Product Type:** Optical Loss Test Set (OLTS)
• **Form Factor:** Handheld
• **Light Source:** Up to three singlemode wavelengths or two multimode wavelengths on a single port
• **Supported Wavelengths:** 830 nm, 850 nm, 980 nm, 1300 nm, 1310 nm, 1450 nm, 1490 nm, 1550 nm, 1590 nm, 1625 nm
• **Power Meter Range:** -10 dBm to -60 dBm (model-dependent); displayed range to -65 dBm or -50 dBm
• **Calibrated Wavelengths:** Typically 10
• **Power Uncertainty:** ±5% ±1 nW
• **Resolution:** 0.01 dB
• **Tone Detection:** 270 Hz, 1 kHz, 2 kHz
• **Power Autonomy:** 260 hours
• **Calibration Interval:** 3 years recommended
• **Connectors:** ST, SC, LC, E2000
## Key Features
• Auto-wavelength recognition automatically selects correct calibration parameters for compatible units
• Distant referencing via signal encryption provides reference power information to receiving end
• No offset nulling required in typical measurement situations
• Wavelength-identification digital encrypted protocol for automatic unit compatibility
• FTTx-ready for PON testing at 1310 nm, 1490 nm, and 1550 nm
## Typical Applications
• Link-loss characterization
• Network certification
• FTTx deployments
• Passive optical network (PON) testing
## Compatibility & Integration
Designed for seamless operation with compatible EXFO instruments supporting the wavelength-identification encrypted protocol.
