Agilent / Keysight 83491A Electrical clock recovery module

The Agilent/Keysight 83491A is an electrical clock recovery module that extracts clock signals from NRZ data streams for high-speed digital communication system analysis. When a direct clock signal is unavailable, this module enables reliable parametric testing and signal characterization across the 86100-series and 83480A Digital Communications Analyzers.

– Technical Specifications

Data Rate Support
• Selectable rates: 155, 622, 1063, 1250, 2125, 2488, and 2500 Mb/s
• Data triggering range: 50 Mb/s to 2500 Mb/s for non-standard rates
• Clock recovery tolerance: ±0.1%

Signal Performance
• Input power level: −10 dBm to +3 dBm
• Output jitter: 0.0125 UI across all rates
• Through path insertion loss: 7 dB (DC to 2500 MHz), 10 dB (4500 MHz)
• Electrical return loss: 20 dB (DC to 1250 MHz), 15 dB (1250–2500 MHz)

Clock Recovery & Triggering
• Phase-locked loop bandwidth: 50–70 kHz (internal path triggering), 4–5 MHz (external output)
• Three trigger sources: narrow bandwidth recovered clock, wide bandwidth recovered clock, and data trigger
• Built-in 50/50 internal splitter reduces external hardware requirements

– Key Features

• Electrical outputs for both recovered clock and regenerated data
• 50 Ohm electrical input connector with 3.5 mm (m) output connectors
• Exceptional jitter performance ensures accurate jitter display on incoming data
• Approximately 5 lbs weight

– Typical Applications

Clock extraction from NRZ data streams in high-speed digital signal analysis, parametric testing without dedicated clock signals, and reliable signal characterization across multiple data rates.

– Compatibility & Integration

Operates within 86100A/B, 86100C, and 86100D Infiniium DCA mainframes. Compatible with Agilent passive and active probes. User’s guide and datasheet available.