The FOT-20A is a compact, field-proven fiber optic tester that combines optical power measurement and light source functionality in a single portable unit. It delivers accurate loss and power verification across single-mode and multimode fiber installations, with measurement capabilities spanning absolute power (dBm, dB, W), relative loss (dB), component insertion loss, and fiber identification via 2 kHz signal detection. Microprocessor control and linear amplification technology ensure stable, long-term calibration traceable to NIST, with custom wavelength calibration available upon request.
Technical Specifications
Measurement Range
• -70 dBm to +20 dBm (primary range)
• 6 dBm to -60 dBm (Ge detector configuration)
• 21 dBm to -50 dBm (GeX detector configuration)
Accuracy & Resolution
• Typical accuracy: ±0.2 dB or ±5% uncertainty
• Resolution: 0.01 dB or 0.05 dB (configuration dependent)
Wavelengths
• Electronically calibrated at 780 nm, 850 nm, 1300 nm, 1310 nm, and 1550 nm
• Custom wavelength calibration available
Detector Options
• Germanium (Ge) detectors
• High-Power Germanium (GeX) detectors
• InGaAs detector for high-precision applications
– Key Features
• Five factory-calibrated wavelengths with single-wavelength or dual-wavelength (850/1300 nm) configurations
• Fiber identification through 2 kHz signal detection
• Electrical offset nulling for extreme temperature operation
• Interchangeable optical connectors: FC, SC, ST, and LC adapters (FOA-XX standard; FOA-22 FC available)
• Single 9 V alkaline battery with >14 hours operation; AC adapter option for continuous use
• Auto-off function extends battery life
• USB data transfer interface
– Typical Applications
• Installation and acceptance testing of fiber-optic links
• Field maintenance and troubleshooting
• Component insertion-loss verification
• Laboratory power and loss measurements
• Fiber continuity verification
– Compatibility & Integration
Supports both single-mode and multimode fiber with standardized optical connectors. Drop-test certified to Telcordia specifications. NIST traceability ensures measurement integrity for calibration-sensitive applications.
