The Tektronix TOP400 Optical Attenuator is a precision, passive, handheld instrument that controls optical power levels in fiber optic systems with exceptional accuracy. This portable device requires no batteries or external power and delivers insertion loss of 1.25 dB typical (less than 2 dB maximum) across its full attenuation range. The TOP400 addresses critical measurement needs—system headroom testing, receiver sensitivity analysis, bit error rate validation, and fault location in active optical links. Its large dial indicator simplifies field adjustment, enabling technicians to set attenuation levels quickly without complexity. The universal connector interface accepts optional FC, ST, and SC adapters, with APC connectors available for applications demanding superior return loss performance.
Technical Specifications
• Attenuation Range: 0 to 35 dB
• Insertion Loss: 1.25 dB typical; less than 2 dB maximum
• Return Loss: Less than -40 dB (FC, ST, SC, DIN connectors); less than -50 dB (optional APC connectors)
• Connector Interface: Universal Connector Interface (UCI)
• Operating Temperature: -15 °C to +60 °C
• Storage Temperature: -35 °C to +70 °C
• Operating Humidity: 0–95% RH (non-condensing)
• Storage Humidity: 0–95% RH (non-condensing)
• Power Requirement: Passive device—no batteries or external power
– Key Features
• Proprietary attenuating mechanism ensures stable, repeatable control
• Large dial indicator for precise, operator-friendly adjustment
• Passive design eliminates maintenance and operational complexity
• Universal connector platform supports multiple fiber optic connector types
• Wide operating and storage temperature range accommodates demanding field environments
– Typical Applications
• System loss measurement and margin analysis
• Optical troubleshooting and fault location
• Installation and maintenance of fiber optic links
• Receiver sensitivity testing and BER measurement
• Research and validation testing
– Compatibility & Integration
The TOP400 integrates into existing fiber optic test setups via its UCI interface. Optional connector adapters for FC, ST, and SC standards enable integration with standard sources and power meters. APC connector options provide enhanced return loss performance for precision measurement environments.
