Tektronix OA5012

The Tektronix OA5012 is a programmable optical attenuator that controls optical power levels in multimode fiber optic systems. It operates as a plug-in module for the Tektronix TM5000 system and supports both manual front-panel adjustment and automated control via GPIB/IEEE-488.2 interface. The single-filter design eliminates measurement artifacts associated with range transitions while an internal mechanical motion algorithm ensures high repeatability across attenuation cycles.

– Technical Specifications

• Wavelength Range: 750 to 1600 nm
• Attenuation Range: ≥ 50 dB
• Maximum Input Power: +3 dBm
• Multimode Fiber Compatibility: 50/125 µm, 62.5/125 µm, 100/125 µm
• Control Interface: GPIB (IEEE-488.2)
• Form Factor: Plug-in module for TM5000 Power Module system
• Dimensions: 330 × 280 × 23 mm
• Weight: 1.2 kg

– Key Features

• Single-filter design mitigates “dark spot” measurement errors during range changes
• Internal mechanical motion algorithm delivers enhanced repeatability
• Dual control modes: manual via front-panel potentiometer or programmatic via GPIB
• Broad wavelength coverage spans telecommunications S, C, and L bands
• Supports three standard multimode fiber geometries

– Typical Applications

• Fiber optic signal attenuation in telecommunications test labs
• Optical power conditioning for measurement systems
• Automated test sequences requiring dynamic attenuation control
• Multimode fiber characterization and validation

– Compatibility & Integration

The OA5012 integrates directly into Tektronix TM5000 modular systems. IEEE-488.2 programmability enables integration with test automation platforms and data acquisition software. For singlemode fiber applications, the OA5002 model is available as an alternative.