The EXFO FOT-92AX is a field-portable optical power meter engineered for precise measurement of signal strength across single-mode and multimode fiber networks. Operating across the 780 nm to 1600 nm wavelength range with an InGaAs detector, it delivers measurements from −43 dBm to +35 dBm with accuracy of ±0.2 dB under calibration conditions. The meter supports automatic wavelength selection and includes integrated 2 kHz signal detection for fiber identification and accelerated testing protocols.
## Technical Specifications
• **Wavelength Range:** 780 nm to 1600 nm
• **Detector Type:** InGaAs
• **Measurement Range:** −43 dBm to +35 dBm
• **Accuracy:** ±0.2 dB (calibration conditions); ±0.12 dB (20 dBm to 28 dBm); ±0.3 dB (28 dBm to 35 dBm)
• **Measurement Units:** dBm, dB
• **Signal Detection:** 2 kHz for fiber identification
• **Fiber Compatibility:** Single-mode, multimode
## Key Features
• Automatic wavelength selection across full operating range
• InGaAs detector provides sensitivity from ultraviolet through near-infrared bands
• Large backlit LCD display for field readability
• Dual power architecture: 9V alkaline battery with automatic switchover to rechargeable NiCd/NiMH pack; supports AC adapter charging
• Battery endurance: up to 20 hours per charge or replacement
• Compact dimensions: 22 cm × 11 cm × 5 cm; weight 0.96 kg
• Interchangeable optical connectors: FOA standard with adapter options for FC, SC, ST, LC (FOA-12 Biconic, FOA-14 D4, FOA-16 SMA/905, SMA/906, FOA-22 FC, FOA-24 Radiall VFO/DF)
## Typical Applications
• Installation and commissioning of fiber-optic networks
• In-service power level verification
• Fiber identification via 2 kHz signal detection
• High-power measurement for amplified systems and long-haul links
## Compatibility & Integration
• FasTest-compatible sources (e.g., FLS-210A/B) enable automated loss testing with reduced measurement error
• Optional RS-232 interface kit and USB connectivity for data export to ToolBox software
• Direct integration with FTB-300 platform and PC-based analysis tools
