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BERTScope® CR Series

Clock Recovery

Versatile Precision Clock Recovery and Analysis

The BERTScope Clock Recovery CR Series advanced architecture measures and displays the PLL frequency response from 100 kHz to 12 MHz; the highest loop bandwidth available for jitter testing on the market today. The first clock recovery instruments to allow full control of parameters including loop bandwidth, peaking/damping, and roll off.
Features & Benefits
  • Instrumentation Quality Clock Recovery
  • 150 Mb/s to 28.6 Gb/s with Continuous Data Rate Coverage to include Next-generation I/Os including PCIe 3.0, 10GBASE-KR, 16xFC, 25/28 G CEI, and 100GBASE-LR-4/100GBASE-ER-4
  • Accurate, Variable Loop Bandwidth from 100 kHz to 12 MHz, with Optional 24 MHz for the Jitter Transfer Function (JTF) Bandwidths of USB 3.0, SATA 6G, and PCIe Gen3
  • Accurate, Adjustable, Self-measured, and Displayed PLL Loop Bandwidth, Peaking, and JTF – Get the "Golden PLL" Response Needed for Standards Compliance Testing
  • Programmable Peaking Adjustment with First- and Second-order Rolloff Capability
  • USB Control Interface Integrated into BERTScope View, or Stand-alone with included BERTScope PC Software
  • DC-coupled Data Through Path for Accurate Signal Integrity
  • Full and Divided Clock Outputs with Selectable Divide Ratios. Full-rate Clock Output up to 14.3 Gb/s, Half-rate Clock Output from 14.3 Gb/s to 17.5 and 28.6 Gb/s
  • Built-in Equalizer Function enables Clock Recovery under High ISI Input Conditions
  • Data Measurement Capability
    • Edge Density Measurement – Determine the mark density of the signal under test
    • Spread Spectrum Clock Waveform View including dF/dt
  • Ideal for Spread Spectrum Clock (SSC) Applications with Large Frequency Excursions
  • Optional Direct Spectral Analysis of Jitter Components when under USB Control from BERTScope or on PC using Provided stand-alone SW.
  • Optional Spectrum Analyzer Display with Cursor Measurements of Jitter Amplitude and Frequency
  • User-settable Frequency-gated Measurements for Band-limited Integrated Jitter Optionally Available
    • Preset Band Limits for PCI Express Gen2 Jitter Spectrum
  • Optional PCIe 2.5, 5, and 8 Gb/s PLL Loop Analysis (Also requires jitter analysis option)
  • CR175A and CR286A offer Optional Higher-sensitivity Data Inputs with Clock Recovery on Signals as Small as 40 mV Amplitude (Single ended), 20 mV Amplitude (Differential) – No DC-coupled Data Through Path with this Option
  • Design/Verification of High-speed I/O Components and Systems
  • Signal Integrity Analysis
  • Certification Testing of Serial Data Streams for Industry Standards
Quick Selector Guide
Model Description Max Bit Rate
CR125A Clock Recovery Instrument 12.5 Gb/s
CR175A Clock Recovery Instrument 17.5 Gb/s
CR286A Clock Recovery Instrument 28.6 Gb/s