Agilent/Keysight N1077B

The Agilent/Keysight N1077B is a clock recovery module that extracts precise timing signals from high-speed electrical and optical data streams. Operating across 125 MBd to 64 GBd, it supports NRZ and PAM4 signal formats and integrates a standards-compliant phase-locked loop (PLL) for reliable lock acquisition on both open-eye and degraded signals. The module delivers recovered clock outputs from 8 GHz to 16 GHz, serving as a timing reference for oscilloscopes and BERT systems in optical communications, high-speed digital design, and compliance testing.

Technical Specifications

• 125 MBd to 64 GBd continuous operation


• NRZ and PAM4 signal support


• Specific options support narrower ranges, including 125 MBd to 32 GBd, 24 GBd to 29 GBd, and 125 MBd to 16 GBd configurations Input & Output Interfaces


• Electrical: Single-ended and differential data inputs


• Optical: Multimode and single-mode input connectors


• Recovered Clock Output: 8 GHz to 16 GHz auxiliary output range Acquisition Performance


• Minimum input level to lock (NRZ/PAM4, single-ended, open eye):

Option 264: 30 mV pp (≤53.125 GBd), 60 mV pp (>53.125 GBd)

Option 253: 60 mV pp

Option 216: 125 MBd to 16 GBd range

Option 225: 24 GBd to 29 GBd range

Key Features

• Adjustable peaking and loop bandwidth up to 20 MHz


• Integrated equalizer (Option EVA) enables locking onto closed-eye signals


• Jitter Spectrum Analysis (Option JSA) for root cause assessment


• Compatibility with N1010300A FlexPLL Application software and N1081PLCA PCI Express PLL Test Application for standards-compliant bandwidth and peaking measurements

Typical Applications

• Optical communications testing and validation


• High-speed digital design verification


• Compliance testing for advanced standards


• Jitter characterization and analysis

Compatibility & Integration Mounts in DCA-M oscilloscopes and integrates with N1000A DCA-X and N1090A, N1092-series, N1094-series DCA-M platforms. Control via USB connection to N1000A or 86100D DCA-X mainframes or PC-based N1010A FlexDCA software. Requires FlexDCA firmware version A.06.90 or above.