The EXFO FPM-300 is a handheld optical power meter engineered for field measurement and troubleshooting in fiber optic networks. This 830 nm–calibrated variant delivers precise power level measurements across multiple wavelengths, making it essential for FTTx deployments, PON testing, and general network diagnostics. Built for field technicians and network engineers, it combines high measurement accuracy with automated wavelength recognition and encrypted referencing protocols to minimize errors and reduce on-site setup time.
## Technical Specifications
**Measurement Range & Accuracy**
• Power range: 10 dBm to –60 dBm (FPM-302) or 26 dBm to –50 dBm (FPM-302X)
• Displayed range: Down to –65 dBm (FPM-302) or –50 dBm (FPM-302X)
• Power uncertainty: ±5% ± 0.1 nW (FPM-302) or ±5% ± 10 nW (FPM-302X)
• Resolution: 0.01 dB
• Screen refresh rate: 3 Hz
**Wavelength Support**
• Calibrated wavelengths: 830 nm, 850 nm, 980 nm, 1300 nm, 1310 nm, 1450 nm, 1490 nm, 1550 nm, 1590 nm, 1625 nm (10 standard calibrations)
• Display units: dB, dBm, W
• Tone detection: 270 Hz, 1 kHz, 2 kHz
**Power & Environmental**
• Power source: AC adapter or three AA batteries
• Battery life: Up to 300 hours
• Operating temperature: –10 °C to 50 °C
• Storage temperature: –40 °C to 70 °C
• Relative humidity: 0% to 95% non-condensing
• Dimensions: 185 mm × 100 mm × 55 mm
• Weight: 0.4 kg
## Key Features
• Automatic wavelength recognition via encrypted digital protocol when paired with EXFO FLS-300 Light Source or FOT-300 Optical Loss Test Set
• Distant referencing using signal encryption for remote power reference transmission
• Automatic offset nulling to eliminate manual calibration under normal operation
• FTTx-ready with PON support at ITU-T G.983.3 recommended wavelengths (1310 nm, 1490 nm, 1550 nm)
## Typical Applications
• Passive Optical Network (PON) commissioning and troubleshooting
• Fiber-to-the-premises (FTTx) deployment verification
• Optical loss and power level measurement in multi-wavelength networks
• Field diagnostic testing across telecommunications infrastructure
## Compatibility & Integration
Works with EXFO’s FLS-300 Light Source and FOT-300 Optical Loss Test Set for coordinated automated measurements. Includes user guide, calibration certificate, AC adapter, batteries, wrist strap, carrying case, and connector adapter (FOA-XX).
