U9764A 100G Clock recovery instrument
U9764A 100G Clock recovery instrument
Product Introduction
The clock recovery instrument can receive input data (or clock) signals and use a phase-locked loop (PLL） The circuit is locked and outputs A recovery clock.The recovered clock can be used as an oscilloscope or BERT Time reference,When sampling the oscilloscope to test the optical eye diagram and waveform, a frequency division clock that is the same as the measured signal is triggered.CDR (Clock recovery)The module is mainly used to test the optical eye diagram with the sample oscilloscope, but does not provide a test environment where the trigger clock is triggered. Typical application is the test of optical network equipment. Since the light metered device itself does not have a frequency-dividing clock output, the clock signal needs to be restored when testing the optical eye diagram.
BookCDRWith oneSFP28Optical port, suitableSFP28Conventional packagingSFP28 SR、LRandBIDIwaitWhen the optical module is connected, only the receiving end of the optical module is required, which is responsible for converting the optical signal into an electrical signal. The instrument then extracts the clock of the electrical signal and outputs it. The clock signal is mainly used for the trigger signal of the oscilloscope.
CDRMain parameters and indicators:
Clock recovery range:25.6Gbps arrive28.1Gbps;
Wavelength range:800-1600nm(Determined by the accessed module wavelength);
Optical input range:+3 ~ -12dBm(Determined by the accessed module saturation and sensitivity);；
Clock output frequency division ratio:2/4/8/16/64/256;
Output electric clock amplitude: AC Couple/ 200~800mVpp in typical;
Spectroscopic ratio (can be selected according to the user):10% (CDR) - 90% (Output)
Supports clock recovery of single-mode and multi-mode optical signals;
Optical interface type: withSFP28Slot (LC/PC）;
Electrical interface type:40GHz 2.92mm female;
Product Features
1、 bringSFP28Packaged optical port, suitable for conventionalSFP28 SR、LR+、SFP28 BIDIIsolated optical module.The module under test can be kept consistent with the module rate and wavelength on the clock recovery instrument.
1、 support100GRate range25.6~28.1G, like25.78125G,27.95etc. Adapt the current signal rate.
2、 The system connection is simple, as shown in the application plan diagram of Chapter 2.
3、 The clock output is a dual-ended differential output,40GHz 2.92mmFemale header interface.
4、 Real-time automatic detection moduleLOSThe signal is displayed and intuitively shows whether the module receives normally.
5、 No reference clock required.
6、 Connect to the machineSFP28The module only needs the output light from the module under test to receive the input light10%Even smaller, only larger than on the machineSFP28The module's reception sensitivity is enough.
7、 25.78125GRecovered clock signalRMSnear500fs, Comparing to high-end clock recovery equipment, as shown in the figure below 1Shown.
Technical Indicators
No. | Ginseng number refer to Standard | Max | Min | unit | Remark |
1 | Data rate range | 28.1 | 25.6 | Gbps | |
2 | Internal signal loss detection(LOS) | 5 | mV | Determined by module sensitivity | |
3 | Power supply voltage(External power supply input voltage) | 5.5 | 4 | V | |
4 | Operating temperature | 70 | 10 | °C | |
5 | CMLClock differential output swing | 800 | 200 | mV p-p | Adjustable output amplitude |
6 | Output clock frequency range (28.1GAs an example) | 14.05 | 0.11 | GHz | |
7 | Clock frequency ratio | 2, 4, 6, 8, 16, 64, 256 | |||
8 | Recovered clock random jitter | 800 | 300 | fs | |
9 | Automatically relock | yes | |||
10 | Adapt to module type | SFP28，SR，LR，BIDI | |||