SNLU245 February   2019 ONET1130EC

 

  1.   ONET1130EC-EVM 11.7-Gbps transceiver with dual CDRs and modulator user’s guide
    1.     Trademarks
    2. 1 Hardware and Equipment
    3. 2 EVM Block Diagram
    4. 3 EVM Connections
    5. 4 Measurement Setup
      1. 4.1 USB2ANY GUI Installation
      2. 4.2 Open-Loop Operation Without Fault Detection or Digital Monitoring
      3. 4.3 Closed-Loop Operation With Fault Detection and Digital Monitoring
    6. 5 LED Indicators
    7. 6 Typical Performance Results
    8. 7 Schematics
    9. 8 ONET1130EC-EVM PCB Layout
    10. 9 Bill of Material

Typical Performance Results

A typical set of conditions for operating the EVM are as follows:

  • VCC = 2.5 V, ICC = 300 mA with ROSA
  • 10.71 Gbps, PRBS31 Pattern
  • Transmitter Single-Ended Mode of Operation
  • TOSA Temperature = 37°C
  • Vea = –0.65 V
  • Laser Bias Current = 0xF0 (approximately 53m A)
  • Transmitter Modulation Current = 0xB0
  • Transmitter Cross Point = 0xB0
  • TX and RX CDRs Enabled
  • Receiver amplitude set to 600mVpp
  • Receiver de-emphasis set to 0x02

Figure 12 shows a typical unfiltered eye diagram.

fig-5.gifFigure 12. Unfiltered Transmitter Eye Diagram

Figure 13 shows a typical filtered eye diagram.

fig-6.gifFigure 13. Filtered Transmitter Eye Diagram

Figure 14 shows a typical receiver eye diagram with the CDR enabled and -20dBm average optical input power to a PIN ROSA.

fig-7.gifFigure 14. Receiver Eye Diagram With CDR Enabled

Figure 15 shows a typical receiver eye diagram with the CDR disabled and -20dBm average optical input power to a PIN ROSA.

fig-8.gifFigure 15. Receiver Eye Diagram With CDR Disabled