The Agilent/HP 83485A is an optical/electrical plug-in module for high-speed digital signal analysis on compatible DCA mainframes. It combines a 20 GHz optical channel with an electrical channel, integrating switchable SONET/SDH filters for transceiver compliance testing. Option H92 includes filters for OC-48/STM-4 (2.488 Gb/s) and OC-192/STM-16 (9.953 Gb/s) applications. The module delivers eye diagram and jitter measurement capabilities essential for telecommunications infrastructure and component validation.
Technical Specifications
Optical Channel
• Bandwidth: 20 GHz (unfiltered)
• Wavelength range: 1000–1600 nm
• Fiber input: 9/125 µm single-mode fiber
• Calibrated wavelengths: 1310 nm and 1550 nm
• User calibration: Supported across 1200–1600 nm range
• Average power operating range: –30 dBm to 0 dBm
• Maximum specified peak input power: 0.4 mW (–4 dBm)
• Maximum safe input: 10 mW peak
• Sensitivity: –10 dBm (smallest power for mask test)
• Input return loss: 33 dB (HMS-10/HP connector)
• Average power accuracy (factory calibrated): ±5% of reading ±100 nW ± connector uncertainty (20–30 °C)
• Average power accuracy (user calibrated): ±2% of reading ±100 nW ± power meter uncertainty (<5 °C temp. change)
Electrical Channel
• Selectable bandwidth: 12.4 GHz and 20 GHz
• Input connector: 3.5 mm male
• Performance identical to HP 83483A module up to 20 GHz
Trigger Channel
• Trigger sensitivity: Normal mode with hysteresis; high-sensitivity mode with hysteresis disabled
• Bandwidth limit: 100 MHz low-pass filter available
– Key Features
• Option H92 provides switchable SONET/SDH filters for 2.488 Gb/s and 9.953 Gb/s compliance testing
• Calibrated SONET/SDH reference receiver compliant with ITU-TS G.957 and Bellcore GR-253-CORE requirements
• Dual-channel architecture supports simultaneous optical and electrical measurements
• Low-noise 12.4 GHz electrical bandwidth mode for oscilloscope performance optimization
– Compatibility & Integration
• Plug-in module for Agilent/HP 83480A, 86100A/B/C/D DCA/DCA-J/DCA-X mainframes
