28000A
Product Brief (PDF)

CR 14300A & CRJ 12500A Option 143 Product Brief (PDF)

CR 12500A Product Brief (PDF)

CRJ 12500A Product Brief (PDF)

Extended Loop Bandwidth Option (PDF)

Signal Integrity Success in Computer and Storage Applications Technical Brief (PDF)

Request free "Anatomy of Clock Recovery" posters

What's New

BERTScope 26 and 28.6 Gbit/s Clock Recovery Models
The new BERTScope CR 25000A/28000A and high sensitivity CR HS 25000A/28000A models fulfill the Golden PLL needs of the emerging 25.78125 Gb/s 100 Gb Ethernet standard (100GBASE-ER4/LR4) and beyond. The new models include built-in equalization for clock signal derivation, enabling lock to closed eye signals impaired with severe Inter-Symbol Interference (ISI). Like the companion CR 12500A and CR 14300A products, these instruments also include features such as self-measured and displayed PLL frequency response curves, easy to use front panel or software integrated controls, automatic locking, accurate loop bandwidth, and flexible peaking.

Extended Loop Bandwidth Option
The maximum loop bandwidth is extended from 12 to 24 MHz with the Extended Loop Bandwidth (XLBW) Option. Many recent serial bus standards such as USB 3.0 require a high Jitter Transfer Function (JTF) bandwidth, which in turn requires a higher loop bandwidth. For example, the XLBW option is capable of achieving the 4.9 MHz JTF bandwidth for USB 3.0.

Clock Recovery You Can Count On

The BERTScope™ CR and CRJ Jitter Analyzer are fully flexible clock recovery instruments designed to make compliance testing of today’s communication devices easy and exact. With jitter being such a complex and contentious parameter, each clock recovery instrument is intended to make compliance testing simple, repeatable, and accurate.

The BERTScope™ CR smoothly integrates with the BERTScope family, or can be used stand-alone to bring compliance to your existing investments in BER and sampling scope equipment.

An optional set of matched clock and data connector cables is available as an accessory to the Clock Recovery instrument. These cables are designed and manufactured to exacting tolerances, eliminating any need to compensate for cable disparity during testing.


	Features of the Clock Recovery instrument:

Instrumentation quality clock recovery
150 Mb/s to 12.5 Gb/s, 14.3 Gb/s, 26 Gb/s or 28 Gb/s continuous coverage
Accurate variable loop bandwidth from 100 kHz to 12 MHz for data rates up to 14.3 Gb/s; 200 kHz to 12 MHz for data rates >14.3 Gb/s

Extend maximum loop bandwidth to 24 MHz with the XLBW Option

Auto lock capability with LED display
Programmable peaking adjustment with first and second order roll off settings
Self-measured and displayed PLL frequency response
Control interface integrated into BERTScope view, or stand-alone with included BERTScopePC software
Single-ended or differential 50 Ω data inputs/outputs (data outputs not available on the high sensitivity HS model)

DC-coupled data through-path, or on the CR 25000A/28000A, choose the high sensitivity HS model for applications involving small signal amplitudes
Full (up to 14.3 GHz) and divided clock outputs with selectable divide ratios
Measurement of clock phase error as a function of frequency and time
Data measurement capability
- Edge density measurement — determine the mark density of the signal under test
- Spread Spectrum Clock Waveform View and dF/dt measurement
Ideal for spread spectrum clock (SSC) applications with large jitter excursions
Built-in equalization on the CR 25000A/ 28000A models enables locking to signals impaired with severe inter-symbol interference (ISI)

Clock Recovery Selection Guide

Maximum Data Rate, Gb/s

Models

Jitter Spectrum to
12.5 GHz

Optional PLL Analysis (Option PCIE)

Loop Bandwidths, Maximum Rate of Operation

Data Through-Path

Standard 12 MHz

24 MHz Extension (Option XLBW)

Internal Pick-Off Tee

High Sensitivity, Direct Input

12.5

CR 12500A

12.5 Gb/s

CRJ 12500A

CRJ 125-PCIE

14.3

CRJ 12500A
Option 143

14.3 Gb/s

CR 14300A

CR 25000A

26 Gb/s

CR HS 25000A

28.6

CR 28000A

28.6 Gb/s

CR HS 28000A

*Data through-path recommended for use below 12.5 Gb/s. Above this rate, use of an external
pick-off tee is advised.

Ordering Information:

	Product Code		Description

	CR 12500A		BERTScope CR Clock Recovery Instrument 150 Mb/s – 12.5 Gb/s

	CR 14300A		BERTScope CR Clock Recovery Instrument 150 Mb/s – 14.3 Gb/s

	CR 25000A		BERTScope CR Clock Recovery Instrument 150 Mb/s – 26 Gb/s

	CR 28000A		BERTScope CR Clock Recovery Instrument 150 Mb/s – 28.6 Gb/s

	CR HS 25000A		BERTScope CR High Sensitivity Clock Recovery Instrument 150 Mb/s – 26 Gb/s

	CR HS 28000A		BERTScope CR High Sensitivity Clock Recovery Instrument 150 Mb/s – 28.6 Gb/s

	Option XLBW		Extended Loop Bandwidth Option

	CR 12500ACBL		High Performance Delay Matched Cable Set

Extended warranty and product upgrade options are available. Contact your sales representative for more information.