Anritsu MS9020B Optical Loss Test Set

The Anritsu MS9020B Optical Loss Test Set combines light source and optical power meter functionality in a single modular platform for field-deployable fiber optic network testing. This plug-in instrument measures optical loss up to 67 dB using LD sources, optical return loss from 0 to 40 dB in the 1.3 µm band, and absolute optical power across 0.66, 0.85, 1.3, and 1.55 µm wavelengths. The MS9020B supports continuous wave and modulated output at 270 Hz, 1 kHz, and 2 kHz, with exchangeable light source and sensor modules enabling rapid configuration changes in the field.

– Technical Specifications

Optical Loss Measurement
• Maximum loss: 67 dB (LD source)
• Operating modes: CW and modulated
• Modulation frequencies: 270 Hz, 1 kHz, 2 kHz
• Wavelengths: 0.66, 0.85, 1.3, and 1.55 µm

Optical Return Loss Measurement
• Range: 0 to 40 dB (1.3 µm single-mode fiber)
• Applicable to connectors and optical devices

Optical Power Meter
• Wavelength calibration: 5 nm steps at three calibration points
• Measurement resolution (dBm/dB display): 0.01/0.1 dB
• Measurement resolution (W/W REL display): 0.1 to 1%

Optical Sensor Specifications
• MA9723A: 0.75 to 1.8 µm range
• MA9622A: +23 dBm maximum input (1.55 µm), return loss >40 dB, polarization dependency 0.1 dB
• Eight sensor types available

– Key Features

• Modular, plug-in light source and sensor architecture for field customization
• Four LD light source types and seven LED source types
• Switchable dual-wavelength units (MS0904A/B for 0.85/1.3 µm; MS0909A for 1.3/1.55 µm)
• Visible 0.635 µm light source for fiber identification and break point detection in single-mode fibers
• Auto offset for zero-point adjustment
• Range hold for measurement range specification and control
• Resume function preserves instrument state after power-down
• 30-minute backup of settings during line voltage loss
• Display backlight on/off control
• Power via AC line, rechargeable battery, or dry cells

– Compatibility & Integration

Connector support: FC, ST, DIN, HMS-10/A, SC types.