CR6256
56Gbaud Clock Recovery Unit
Semight CR6256 is a compact, cost-effective and efficient desktop high-speed signal clock recovery unit, which supports either Non-Return-to-Zero (NRZ) or Pulse Amplitude Modulation 4-level (PAM4) signals clock extraction at 24.33-56.25Gbaud. It is widely used in 400G/800G high-speed communication optical transceiver and Interface test and measurement.
- Wide Range – Support NRZ / PAM4 signal clock extraction at 24.33~56.25Gbaud
- Flexible Configuration – Single-Mode and Multi-Mode in one unit Support both optical and electrical signal clock recovery (optional)
- Excellent Performance – Fast locking speed under auto/semi-auto mode Ultra Low random jitter
- High Sensitivity – Very conducive to silicon photonic application with ultra-low input optical power
- Wide Application – Complies with IEEE 802.3 Ethernet, PON, Fiber Channel, and OIF standards for 100G/200G/400G/800G and 25G/50G PON optical transceivers testing
- Easy to Use – With either touch lcd screen or flexible remote-control solution, the CR6256 can work with sampling oscilloscopes easily and quickly
- Multiple Frequency Output – Support 1/2, 1/4, 1/8, 1/16 It can meet the trigger bandwidth requirements of various sampling oscilloscopes in the industry
- More Application – CR6256 can be used with other sampling oscilloscopes in the industry
Features and Benefits
High sensitivity
-12 dBm @ 26.5625Gbaud
-12 dBm @ 53.125 Gbaud PAM4/1310nm
-10 dBm @ 53.125Gbaud PAM4/850nm
Application
Optical transceiver with built-in DSP/CDR requires the use of a clock recovery unit. (4x56Gbaud or 8x56Gbaud PAM4)
Real-time monitoring of input power
LCD screen displays real-time input optical power, as well as the signal lock status.
| Item | Description |
| Data Rate Input Range | 24.33024 ~ 28.9 Gbaud；
49.7664 ~ 56.25 Gbaud； |
| Modulation | NRZ/PAM4 |
| Optical Interface | FC/UPC |
| Electrical Interface | 2.92 mm female，50 Ω |
| Optical Input Power Range | -12 ~ +5 dBm |
| Optical Sensitivity | -10 dBm @ 53.125 Gbaud PAM4/850 nm；
-12 dBm @ 53.125 Gbaud PAM4/1310 nm； -12 dBm @ 26.5625 Gbaud PAM4； |
| Wavelength Range | 800 ~ 1650 nm |
| Factory Calibrated Wavelength[1] | 850/1310 ±10 nm |
| Recovery Clock Divide Ratio | 1/2，1/4，1/8，1/16 |
| Recovered Clock Amplitude | 300 mVpp |
| Recovered Clock Random Jitter | ≤230 fs |
| Clock Output Characteristic Impedance | 50 Ω |
| Loop Bandwidth | 4 MHz (typical) |
[1] ±10 nm refers to the Calibration Light Source wavelength error