This handheld source delivers stable, precise light for single-mode fiber testing. It is engineered for 1310 nm and 1550 nm operation and offers multiple modulation modes, automatic wavelength detection, and power-saving features. It is complete with universal PC/UPC connector adapters. Key Features Dual-Wavelength Output: 1310 nm and 1550 nm ±20 nm with ≤5 nm spectral width Stable Performance: ≤0.05 dB drift over 15 minutes; adjustable output from –5 to –12 dBm (–7 dBm typical) Multiple Modulation Modes: CW, 270 Hz, 330 Hz, 1 kHz, and 2 kHz for versatile testing Smart Power Management: Backlight auto-control, configurable 10-minute auto-off, and ≥25 hours runtime on three AA batteries Universal Adapters: Includes FC, SC, ST, and FC-LC (PC/UPC) connector tips for full single-mode compatibility User-Friendly Design: 2.4″ color LCD, kickstand for hands-free use, and rugged carry case What’s Included Optical Light Source FC-UPC, SC-UPC, ST-UPC, and FC-LC-UPC adapters Two fiber-cleaning swabs Instruction manual Three AA batteries Protective carrying case Specifications Wavelengths: 1310/1550 nm ±20 nm Spectral Width: ≤5 nm Output Power: –7 dBm typical; –5 to –12 dBm adjustable Stability: ≤0.05 dB over 15 minutes Modulation Frequencies: CW, 270 Hz, 330 Hz, 1 kHz, 2 kHz Display: 2.4″ color LCD Power: 3× AA batteries (≥25 hr) Auto-Off Timer: 10 minutes (configurable) Operating Temp.: –10 °C to +60 °C Storage Temp.: –25 °C to +70 °C Dimensions: 7″ × 3.19″ × 1.25″ (178 × 81 × 32 mm) Weight: 0.64 lb (290 g) Optimize your single-mode fiber testing with this feature-rich, field-ready light source. Documentation FLS-50 Data Sheet FLS-50 Instructions
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