Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
74LCX04 Datasheet(PDF) 4 Page - Micrel Semiconductor |
|
74LCX04 Datasheet(HTML) 4 Page - Micrel Semiconductor |
4 / 10 page Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 4 18. On Panels list, select Temperature Compensation. Load look-up tables for APC, Modulation, Bias current Fault, and End-of- Life from appropriate files. If no loading is done, the default value 0 is used for all the LUT. Return to the main window. 19. On Panels list, select OEM settings. Enter the desired DAC values between 0 and 255 for the displayed parameters then select SET NEW. Select GET CURRENT to make sure that the set values are written into the registers. Checking them can mask the faults. Return to the main window. 20. On Panels list, select User. Check APC0 in the USER CONTROL REGISTER (default setting). All the other parameters can be checked later to verify their functionality. Return to the main window. 21. On Panels list, select Result. The values of the five monitored parameters as per SFF- 8472 are now displayed. Type the alarm and warning thresholds and select SET NEW LIMITS. Select GET CURRENT LIMITS to check that the set values are written into the registers. Return to main window. 22. Set modulation current and bias current to get the desired output power and extinction ratio out of the laser. Use OEM Settings panel or TX Setup panel to do that: a. In OEM settings window, set the bias by entering a value from 10 to 255 in APC SET POINT 0 box and modulation by entering a value from 10 to 255 in MOD DAC setting box followed by SET new. b. In TX calibration window, set the bias by entering a value from 10 to 255 in APCO (DEC) box and modulation by entering a value from 10 to 255 in MOD DAC setting box followed by SET new. After setting the new value for bias or modulation current, toggle TXDISABLE/TXENABLE on the main window. 23. At this step, there is no received power since no signal is applied at the input of the receiver. 24. Adjust the VOA to bring the optical power to the desired level at the input of the receiver. Then connect the output of the VOA to the input of the receiver using appropriate fiber jumper. 25. If the installed receiver has RSSI signal, a value (needs calibration) of the received power should be displayed now. 26. On Panels list, select TX Setup to calibrate the TX power. Measure the optical power at the output of the VCSEL and enter the value (in mW) in the MEASURED TX POWER box, then select CALIBRATE. The monitored value is adjusted to display the measured value by automatically changing the slope set in the EXTERNAL CALIBRATION window. Reconnect the VOA to the VCSEL and return to the main window. 27. On Panels select RX Calibration. Measure the input power to receiver at the output of the VOA and enter the measured value (in mW) in the MEASURED RX POWER box then select CALIBRATE. The monitored value is adjusted to display the measured value by automatically changing the slope set in the EXTERNAL CALIBRATION window. Reconnect the VOA to the receiver and return to the main window. 28. At this stage, the masked faults should be unmasked and if there is a fault indication try to find the cause for it and fix it to get the transceiver running fault free and try to measure the performance of the laser driver and post amplifier. |
Número de pieza similar - 74LCX04 |
|
Descripción similar - 74LCX04 |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |