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5010 Datasheet(PDF) 3 Page - Micrel Semiconductor |
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5010 Datasheet(HTML) 3 Page - Micrel Semiconductor |
3 / 10 page Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 3 Set-Up and Operation Follow the step-by-step procedure to set-up the board safely and properly: 1. Connect the on board DB-25 connector to the parallel port of a computer. 2. Connect the differential input of the laser driver to DATA output of the pattern generator. 3. Use a multimode fiber jumper, with appropriate connectors to connect optical output of the VCSEL to a VOA (variable optical attenuator) preset to 0dB attenuation. 4. Connect the output of the VOA to the optical input of the DCA, power-meter, or optical to electrical converter. 5. Pre-adjust the power supply to 3.3V and turn it off. Connect TP3 to VCC (3.3V) and TP5 to GND, then turn the power supply ON. The total current drawn from the power supply should be less than 300mA. 6. Launch the MIC3000/1 software. The MIC3001 Optical Transceiver Management IC panel opens with Panels and Help grayed out and only Utilities can be run. 7. Refer to MIC3000/1 Software User’s Guide for the detailed settings. 8. On the main window select Utilities to open the utilities panel, then select SCAN to read the address of the MIC3001 and GET to read the manufacturer ID, Device ID, and Die Revision. If there is a failure in reading one of these parameters, you cannot proceed further. If all the parameters are read correctly, close the Utilities window to return to the main window where Panels and Help are no longer grayed out. 9. Select Panels to display the list of setting panels. 10. All the bits displayed on the panels can be read and/or modified on the panels or by accessing the registers directly by selecting ALL REGISTERS, enter the serial address, the register address, select GET to read the content or type a value and select SET NEW to write. In this procedure the bits are set on the panels. 11. Select OEM CONFIG 0-2 to open the OEM configuration registers 0, 1, and 2 windows. 12. In OEM Configuration Register 0 window, set ENABLE/DISABLE to DISABLE, VMOD REFERENCE to GND, and temperature zone to INTERNAL. 13. In OEM Configuration Register 1 window: a. Set APC OP-AMP TYPE to COMMON EMITTER. Note: Set the selection bit to 0, 0 should correspond to EMITTER FOLLOWER, which should be displayed on the bottom and COMMON EMITTER on the top. b. Select the voltage to report in VINH:VINL. c. Set Feedback voltage source to 1.22V. d. Set FEEDBACK BIAS REF and RES TERMINATION to GND and VBIAS DRIVE to SOURCE (NPN). Set INTERNAL FEEDBACK RESISTOR to an arbitrary value (1.6K for example). e. Set FEEDBACK BIAS REF and RES TERMINATION to GND and VBIAS DRIVE to SOURCE (NPN). f. Set INTERNAL FEEDBACK RESISTOR to arbitrary value (1.6K for example). 14. In OEM Configuration Register 2, the MIC3001 address and look-up table offset can be modified. The look-up table covers 128°C. The temperature range for offset = 0 is 0° to +127°C.) This range can be shifted down by 2x the value. The offset is set to. If offset = 15, the temperature range becomes –30° to +97°C. 15. In OEM Configuration Register 0 window, set ENABLE/DISABLE to ENABLE. 16. On Panels list select OEM CONFIG 3-4 and select EXTERNAL CALIBRATION (default setting), LOS COMPARATOR ENABLE, SHDN, RXLUT INPUT TEMPERATURE, and RSOUT. If needed, later set ISTART to a different value to speed up the APC loop during laser turn ON after a FAULT occurrence. Close the window to return to main window. 17. On Panels list, select External Calibration. Set all the offsets to 0 and slopes to 1. Set RX_PWR(1) to 1. These parameters might need to be changed later to correct the measured values (calibration). Return to the main window. |
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