15Gbps Full Rate CDR Provide The Clock Recovery Signal
Instruments
U9710C CDR (Clock Recovery ) is mainly used to provide clock
recovery signal in the test environment without triggering clock,
so as to use the sampling oscilloscope to test the optical eye
diagram of the device. The typical application is the testing of
optical network equipment or the BOB product in PON application.
Because the photometric device itself has no frequency division
clock output, it is necessary to recover the clock signal to
trigger the sampling oscilloscope when testing the optical eye
diagram.
Key technical indicators
Jitter tolerance: It needs to meet standards such as ITU-T G.8251
and IEEE 802.3. Usually, the input jitter tolerance is required to
be at the UI (unit interval) level (such as ±0.5UI).
Output jitter: The jitter of the recovery clock should be below the
100fs (femtosecond) level to ensure the test accuracy of downstream
devices such as bit error rate testers and oscilloscopes.
Sensitivity: Supports optical signal input as low as -15 DBM (via
photoelectric conversion module) or MV-level electrical signal
input.
Loop bandwidth: The adjustable range is typically from 100kHz to
20MHz to accommodate different signal characteristics and test
requirements.
Technical Parameters
Item | Technical Parameters | Max. | Min. | Unit |
1 | Data rate range (data rate point) | 0.622/1.25/2.488/2.5/3.125/4.25/5.0/6.25/7.5/8.5/ 9.953/10.0/10.3125/10.709/11.096/11.317/11.519/ 11.7/12.0/12.5/13.5G/14.025/14.0625/14.25/14.5/15.0 | Gbps |
3 | Wavelength range: Single mode (multiple modes are optional) | 1610(1310) | 1310(850) | nm |
4 | Optical input range | +3 | -15 | dBm |
5 | The clock restores the frequency division ratio | 2 / 4 / 8 / 16 / 32 / 64 | |
6 | Output the electrical clock amplitude | 600(Typical value) | mVpp |
7 | Clock rising time(OC-192)(20%~80%) | 33.1 | 22.2 | ps |
8 | Clock descent time(OC-192)(80%~20%) | 33.7 | 23.9 | ps |
9 | Output jitter(10.3125Gbps) | 1.0 (Typical value) | ps |
10 | Clock frequency(10.3125Gbps) | 5.156/2.578/1.289/0.644/0.322 | GHz |
11 | Internal signal loss detection(LOS) | 128 (过载) | 5(灵敏度) | mV |
12 | Power supply voltage (external power supply input voltage) | 5.5 | 4 | V |
13 | Working temperature | 85 | -40 | ℃ |
The 15Gbps full-rate clock recovery instrument is a core device in
high-speed communication testing, and its performance directly
affects the reliability of the test results. When selecting the
model, the rate range and jitter performance need to be
comprehensively considered.
