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Clock Recovery Unit

CR6256

56Gbaud Clock Recovery Unit


Semight Instruments CR6256 is a compact, cost-effective desktop high-speed signal clock recovery unit, which supports to derive a clock from either non-return-to-zero (NRZ) or pulse amplitude modulation 4-level (PAM4) signals and is very suitable for measurement of various high-speed communication standard rate optical transmitters.

Features

  • Wide range of rates

    Support clock extraction from NRZ / PAM4 signal at 49.7664~56 Gbaud or 24.8832~32.5 Gbaud
  • A wide range of applications

    IEEE802.3 Ethernet, Fibre Channel and OIF standard specifications for TDECQ indicators
  • Easy to use

    Built-in touch screen display and control, all functions of clock recovery can be realized without external computer
  • High sensitivity

    It is very beneficial to the application scenario of silicon photonics under low optical power
  • Easy to use

    Can be used with other sampling oscilloscopes in the industry, with built-in touch screen display and control
  • Flexible configuration

    Single and multi-mode integration
    Both optical and electrical clock recovery are supported
    Support built-in beam splitter (optional)
  • Multiple frequency output

    Support 1/2, 1/4 @ 53.125 Gbaud
    1/1, 1/2 @ 26.5625 Gbaud
    It can meet the trigger bandwidth requirements of various sampling oscilloscopes in the industry
  • Excellent performance

    Fast locking,
    full/semi-auto locking mode,
    Very low random jitter

Features and Benefits

  • High sensitivity

    -14 dBm @ 26.5625Gbaud/ -12 dBm @ 53 Gbaud (PRBS15, TDECQ=2.0dB) is very beneficial to the application scenario of silicon photonics under low optical power;
    Effect of input power on TDECQ of 26Gbaud PAM4 signal
  • High sensitivity

    Effect of input power on TDECQ of 53Gbaud PAM4 signal
  • Optical modules with built-in digital DSP CDR must use Clock Recovery Unit to extract the clock

  • Real-time monitoring of input power

    LCD screen displays real-time input optical power, monitoring link status at any time
    Touch screen settings, complete the test, does not depend on the computer

Clock recovery rate range 24.8832 ~ 32.5 Gbaud; 49.7664 ~ 56 Gbaud;

Support modulation type

NRZ/PAM4
Optical interface FC/UPC
Electrical interface 2.92 mm female, 50 Ω
Input optical signal power range -14 ~ 3 dBm
Receiver sensitivity -12 dBm @ 53.125 Gbaud PAM4; -14 dBm @ 26.5625 Gbaud PAM4;
Input wavelength range 850~1650nm
Optical interface return loss

<-23 dB

Recovery clock divider ratio 1/2,1/4 @ 53.125 Gbaud; 1/1,1/2 @ 26.5625 Gbaud;

Clock output amplitude

300 mV

Random jitter of recovered clock

290 fs
Characteristic impedance of clock output port 50 Ω

Loop filter bandwidth

4 MHz

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