The Anritsu MS9020D Optical Loss Test Set is a portable instrument for measuring optical power, loss, and return loss across fiber optic networks. It verifies system performance and diagnoses faults in optical fiber installation and maintenance. The modular design accommodates plug-in light source and sensor units, enabling rapid wavelength switching and one-touch measurement of common band pairs. A 0.635 µm visible light source facilitates fiber break detection up to 5 km with flickering identification capability.
Technical Specifications
Optical Loss Measurement
• Dynamic range: up to 67 dB
• Wavelength bands: 0.66 µm, 0.85 µm, 1.3 µm, 1.55 µm
• Modes: Continuous Wave (CW) and modulated light (270 Hz, 1 kHz, 2 kHz)
• Measurement resolution: 0.1%–1% (W/W REL) or 0.01 dB–0.1 dB (dBm/dB REL)
Optical Return Loss Measurement
• Range: 0 to 40 dB for 1.3 µm single-mode fiber
• Connectors and optical devices measurable via dedicated return loss units
Power Meter Functionality
• Wavelength calibration in 5 nm steps at three wavelengths
• Automatic sensor deviation compensation in 5 nm steps
• Direct absolute value reading
Light Source and Sensor Options
• 4 LD (laser diode) sources
• 7 LED sources
• Switchable source units support one-touch measurement of 0.85/1.3 µm and 1.3/1.55 µm combinations
– Key Features
• Plug-in source and sensor architecture enables fast unit exchange
• Modulated light function reduces stray light interference for improved measurement accuracy
• 0.635 µm visible light source with flicker mode for fiber identification
• Measurement blanking capability
• Battery alarm for low voltage indication
• 30-minute settings backup during power loss or battery replacement
• Backlight display with on/off control
– Typical Applications
• Fiber optic network installation verification
• In-service fault diagnosis and troubleshooting
• Return loss characterization of single-mode fiber connectors and passive components
• Field power measurements with wavelength calibration
– Compatibility & Integration
Connectors and Adapters
• FC, ST, DIN, HMS-10/A, and SC via interchangeable adapter units
• Bare fiber and fiber adapter support
• Optional connectors: MA9004A, MA9005A
Power Options
• AC mains
• Rechargeable battery
• Dry cells
Dimensions/Weight
• 90 mm W × 190 mm H × 38 mm D
• 700 g
Data Interface
• Recorder-out port for external logging
