100Gbps Multi - Frequency Division Clock Recovery Instrument

100Gbps Multi-Frequency Division Clock Recovery Instrument

  The U9764A CDR (Clock Recovery Instrument) is primarily used to provide clock recovery signals in test environments where no clock is triggered, thus testing the optical eye pattern of the device with a sampling oscilloscope. Typical applications are the testing of optical network devices, or for BOB products in PON applications, since the optical device itself does not have a split clock output, the clock signal needs to be recovered to trigger the sampling oscilloscope when testing the optical eye map.

   The U9764A CDR is equipped with an SFP28 optical port, which is suitable for the conventional SFP28, SR, LR and BIDI optical modules packaged with SFP28. Only the receiving end of the optical module is required to convert the optical signal into an electrical signal, and the CDR will extract the clock of the electrical signal and output it. The clock signal is mainly used for the trigger signal of the oscilloscope.

What is a clock recovery device?

   A Clock Recovery Unit is a device used to recover clock signals in digital communications. In digital communication, a synchronized clock signal is needed between the sender and receiver to ensure correct data transmission. The function of the clock recovery instrument is to extract the correct clock signal from the received data stream.

   Clock recovery instrument is usually used in optical fiber communication, satellite communication, Ethernet and other high-speed digital communication systems. In these systems, the data is transmitted in digital form, and the clock signal is used to determine the transmission rate and time interval of the data. Due to possible problems such as clock jitter, clock drift, or transmission noise during transmission, the receiver needs to use a clock recovery meter to regenerate an accurate clock signal.

   The working principle of a clock recovery device is usually based on a Phase-Locked Loop (PLL) or related technology. Based on the clock information in the received data stream, it adjusts the local clock to keep it in sync with the sending end. By constantly adjusting the frequency and phase of the local clock, the clock recovery device can gradually eliminate clock offset, thus achieving the recovery of accurate clock signals.

The performance and functionality of the clock recovery meter will vary depending on the application and requirements. Some advanced clock recovery devices may have adaptive functions, which can be dynamically adjusted according to the characteristics of the transmitted signal to adapt to different communication environments and data rates. In addition, the clock recovery meter may include additional features such as bit error rate detection, jitter analysis, and clock output interfaces to help analyze and monitor the performance of the communication system.In short, the clock recovery instrument plays a vital role in the digital communication system, it can extract the accurate clock signal from the received data stream to ensure the correct transmission and synchronization of data.