Tektronix Clock Recovery (CR) BERTScope Series

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Bit Error Rate Testers (BERT)

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The Tektronix Clock Recovery CR BERTScope Series advanced architecture measures and displays the PLL frequency response from 100 kHz to 12 MHz. These are the first clock recovery instruments to allow full control of parameters -- including loop bandwidth, peaking/damping, and roll-off.

The Tektronix CR BERTScope Series instruments also allow you to view and measure SSC generated in your system. Problems with the SSC modulation waveform can result in clock rate deviation beyond the capability of the channel or receiver. To avoid the tracking and possible EMI problems from incorrect deviation rates, some of the new serial data standards are specifying the minimum and maximum rate of change of the SSC carrier frequency. The Tektronix CR BERTScope Series can directly display the dF/dt function and provide a parametric measurement of the minimum and maximum peaks.

The following units are part of the Tektronix CR-BERTScope series: the CR125A, the CR175A, and the CR286A.

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	CR125A	CR175A	CR286A
Input sensitivity	100 mV single ended (typical) 50 mV differential (typical)
Input data rate coverage	150 Mb/s to 12.5 Gb/s	150 Mb/s to 17.5 Gb/s	150 Mb/s to 28.6 Gb/s
Data insertion loss	2 dB (min), 2.6 dB (typical), 3 dB (max), up to 12.5 Gb/s
Data input voltage range	-5 V (min), +5 V (max)
Measured edge density accuracy	± 1%, up to 14.3 Gb/s, ± 3% >14.3 Gb/s
Equalization range	0 to 10 dB	0 to 10 dB	0 to 10 dB
Data output	Up to 12.5 Gb/s	Up to 12.5 Gb/s	Up to 12.5 Gb/s

Tektronix Clock Recovery (CR) BERTScope Series

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