JDS Fitel RM3750B Backreflect Meter 1310/1550 nm

The JDS Fitel RM3750B Backreflect Meter is a portable, direct-display instrument for precise measurement of backreflection, insertion loss, and optical power in single-mode fiber optic systems. Equipped with a dual-wavelength integrated light source at 1310 nm and 1550 nm, it delivers backreflection sensitivity to -75 dB with ±0.4 dB relative accuracy. The instrument features FC/APC ultra-low backreflection connectors and a 2 mm InGaAs detector optimized for singlemode (9/125 µm) fiber. Direct digital display enables immediate result interpretation, while user-adjustable calibration and extraneous backreflection compensation ensure measurement integrity across connector testing, component evaluation, and installation verification workflows. An internal rechargeable battery supports field portability. Data logging to computer or serial printer occurs via RS-232 interface and foot pedal control. Detector port adapters for LC, SC, and FC connectors accommodate diverse test configurations.

– Technical Specifications

• Measurement Types: Backreflection, insertion loss, optical power
• Wavelengths: 1310 nm ± 20 nm; 1550 nm ± 20 nm
• Backreflection Range: 0 to -75 dB
• Backreflection Sensitivity: -75 dB typical
• Backreflection Accuracy (Relative): ±0.4 dB (-60 to -67 dB); ±0.8 dB (-67 to -72 dB); ±1.5 dB (-72 to -75 dB)
• Insertion Loss & Power Range: Down to -80 dBm
• Optical Power Measurement: -70 dBm minimum
• Power Measurement Accuracy: ±0.1 dB (-70 to -80 dBm); ±0.1 dB (0–3 dBm and -35 to -40 dBm, excluding 1650 nm)
• Detector: 2 mm InGaAs
• Fiber Type: Singlemode (9/125 µm)
• Output Connector: FC/APC (ultra-low backreflection)
• Detector Port Adapters: LC, SC, FC (available separately)

– Key Features

• Dual-wavelength light source (1310/1550 nm)
• Direct digital display of measured values
• User-adjustable calibration
• Extraneous backreflection compensation
• Internal rechargeable battery
• RS-232 remote interface
• Foot pedal data logging control

– Typical Applications

• Connector backreflection and loss testing
• Component evaluation
• Installation verification
• Quality assurance acceptance testing

– Compatibility & Integration

• Hybrid jumper accommodation via adapter connectors
• Serial data output to computer or printer
• Detector port adapter options (LC, SC, FC)