The Agilent/HP 83485A is a plug-in optical/electrical module for the 83480A Digital Communications Analyzer and 86100A/B/C/D DCA mainframes. It delivers integrated optical receiver and electrical channel measurement capability for high-bandwidth optical signal analysis, eye diagram characterization, and SONET/SDH compliance testing. The module combines a calibrated optical channel with a dedicated electrical channel, each supporting dual bandwidth modes (12.4 GHz and 20 GHz) for flexible waveform acquisition and signal integrity assessment across optical networks.
Technical Specifications
• Optical Channel: One channel with integrated receiver; calibrated at 1310 nm and 1550 nm; user calibration supported 1200–1600 nm
• Electrical Channel: One channel; performance equivalent to HP 83483A module
• Bandwidth: Dual selectable modes per channel—12.4 GHz (low-noise oscilloscope operation) and 20 GHz (high-fidelity analysis)
• Optical Sensitivity: −10 dBm (minimum power for mask test)
• Fiber Input: 9/125 µm
• Switchable Filter: Fourth-order Bessel-Thomson; rates at 155 Mb/s, 622 Mb/s, 2488 Mb/s (option 034); front-panel or HP-IB controlled
• Trigger Specifications: DC to 2.5 GHz (Normal Mode), 2.0–12 GHz typical (High Speed Mode); trigger jitter <2.5 ps rms (Normal) / <2 ps rms (High Speed); level range ±1 V; minimum sensitivity 40 mVpp at 100 MHz (Normal Mode), 200 mVpp 2.0–12 GHz (High Speed Mode)
– Key Features
• Integrated optical receiver eliminates signal-distorting external cabling and connectors
• SONET/SDH reference receiver meets ITU-TS G.957 and Bellcore GR-253-CORE frequency response standards
• Switchable Bessel-Thomson filter for compliance testing or full-bandwidth characterization
• Wideband trigger input with limited, normal, and high-speed bandwidth modes
• Low trigger jitter performance across frequency range
– Typical Applications
• Optical transceiver and receiver evaluation
• SONET/SDH transmitter and receiver compliance verification
• Tributary signal measurements
• Eye diagram and waveform analysis on optical and electrical signals
• General-purpose oscilloscope measurements on recovered electrical signals
– Compatibility & Integration
Compatible with HP/Agilent/Keysight 83480A Digital Communications Analyzer and 86100A/B/C/D DCA mainframes.
