Texas Instruments ONET8501P-EV Manual Download Page 7

 ONET8501P-EV 

11.3 GBPS RATE-SELECTABLE LIMITING AMPLIFIER – EVALUATION BOARD

 

Version 0.4 · October 2007 

 

TI CONFIDENTIAL

 

www.ti.com 

MEASUREMENT SETUP 

Follow this procedure to quickly setup for 
measurements. The board is pre-set for open loop 
operation. 

1.  Install the ONET8501_gui_install_v0.7.msi or 

higher revision file and follow the 
instructions. Use the default directory for the 
installation. 

2.  Attach the interface cable from the USB port 

of the computer to the USB port of the 
evaluation board. The interface circuitry is 
powered through the USB cable. 

3.  The driver for the USB port will need to be 

installed. Follow the instructions for installing 
a new driver. The driver is located at 
C:\Program Files\Texas Instruments\TI 
(ONET8501V-ONET8501P) Eval Board\ 
Driver. Once a particular USB port has been 
configured, this same port must always be 
used to control the interface board. 

4.  All control and monitoring functions are done 

through the GUI so no jumpers have been 
installed except J14 which is set to select an 
external power supply. 

5. Connect a differential data input signal 

source to the SMA connectors DIN+/DIN–. 
Set the data rate up to 11.3Gbps. Set the 
amplitude between 5mV

p-p

 differential and 

2000mV

p-p

 differential. For small input 

signals, attenuators may be required.  

6. Connect the output SMA connectors 

DOUT+/DOUT– through 50

Ω

 matched impe-

dance cables to a 50

Ω

 oscilloscope with a 

bandwidth of at least 12GHz. Ensure that the 
maximum input voltage of the oscilloscope is 
not exceeded. Use appropriate attenuators if 
needed. 

7.  Apply a +3.3V supply to the +3.3V banana 

jack and the supply ground to the GND 
banana jack. The typical current 
consumption in default mode will be about 
36mA. 

8.  Run the GUI by clicking the ONET8501 GUI 

shortcut icon on the desktop. Choose the 
ONET8501P tab. The interface will be as 
shown in Figure 4. The USB communication 
error indicator and I2C communication 
indicator should both be green as shown in 
Figure 5. If the I2C indicator is red, then 
press the reset button on the interface board. 

9.  The device will power up in a default state 

with an output amplitude of 300mVpp. The 
features of the device are controlled through 
the corresponding sliders or selection 
buttons. To use the input threshold control to 
its full range, the DC offset cancellation 
should be disabled. Please refer to the data 
sheet for the register functionality. 

10. Typical eye diagrams at 10.3125Gbps are 

shown in Figures 6 and 7. 

11. The ONET8501P can also be controlled 

through the I2C Diag page by typing in the 
HEX values for the appropriate registers and 
clicking on the Write Bytes box. The register 
values can be read by clicking on the Read 
Bytes box. 

 
 
 
 
 

 

 

 

 

Summary of Contents for ONET8501P-EV

Page 1: ...rate selectable limiting amplifier This fully assembled and factory tested evaluation board allows complete validation of all device functions For optimum performance the board is equipped with 50Ω SMA connectors and well controlled 50Ω impedance microstrip transmission lines In order to account for measurement inaccuracies caused by inevitable line loss calibration lines are provided consisting o...

Page 2: ...ON BOARD Version 0 4 October 2007 2 TI CONFIDENTIAL www ti com EV BOARD SCHEMATIC DIAGRAM ____________________________________________________ The EV board schematic diagram is given in Figure 2 Signal Path and Control Circuitry Supply Filtering and Calibration Lines ...

Page 3: ... Instruments Incorporated PRODUCT PREVIEW information concerns products in the formative or design phase of development Characteristic data and other specifications are design goals Texas Instruments reserves the right to change or discontinue these products without notice www ti com USB Interface Figure 2 ONET8501P EV Evaluation Board Schematic ...

Page 4: ...bration purposes Furthermore in the time domain it helps to determine the impact of the EV board on signal edge speed as well as deterministic jitter SIGNAL PATH AND CONTROL CIRCUITRY _____________________________________________ The signal path consists of the input port SMA connectors DIN and DIN the coupling capacitors C14 and C19 the 50Ω single ended 100Ω differential input transmission lines ...

Page 5: ...umpers are shown in Figure 3 below A description of the jumpers and connectors is given in Table 1 Follow the guidelines in the measurement setup section to quickly get started Figure 3 ONET8501 EV Evaluation Board Jumper and Connector Locations JP1 Vcc Connection JP2 GND Connection DIN DIN DOUT DOUT CALOUT CALOUT CALIN CALIN D8 LOS indicator USB Connector Reset Button D7 Disable indicator J14 Pow...

Page 6: ...nector for inverted output data signal On board AC coupled and on chip 50Ω back terminated to VCC CALIN Non inverted calibration line input SMA connector for non inverted calibration line input CALIN Inverted calibration line input SMA connector for inverted calibration line input CALOUT Non inverted calibration line output SMA connector for non inverted calibration line output CALOUT Inverted cal...

Page 7: ...mall input signals attenuators may be required 6 Connect the output SMA connectors DOUT DOUT through 50Ω matched impe dance cables to a 50Ω oscilloscope with a bandwidth of at least 12GHz Ensure that the maximum input voltage of the oscilloscope is not exceeded Use appropriate attenuators if needed 7 Apply a 3 3V supply to the 3 3V banana jack and the supply ground to the GND banana jack The typic...

Page 8: ...ONET8501P EV 11 3 GBPS RATE SELECTABLE LIMITING AMPLIFIER EVALUATION BOARD Version 0 4 October 2007 8 TI CONFIDENTIAL www ti com Figure 4 ONET8501P GUI Figure 5 ONET8501P I2C Diag Page ...

Page 9: ...tober 2007 9 TI CONFIDENTIAL www ti com Figure 6 Output Eye Diagram at 10 3125Gbps Highest Bandwidth Setting and 600mVpp Output Setting with 10mVpp 231 1 PRBS Input Figure 7 Output Eye Diagram at 10 3125Gbps Highest Bandwidth Setting and 600mVpp Output Setting with 1000mVpp 231 1 PRBS Input ...

Page 10: ...er 2007 10 TI CONFIDENTIAL www ti com REVISION HISTORY Rev Date Description Author 0 1 02 22 2007 Initial Draft Alex Davidson 0 2 02 26 2007 Added GUI interface Fig 4 and changed Fig 5 A Davidson 0 3 02 28 2007 Updated Figures 4 and 5 A Davidson 0 4 10 17 07 Updated Figures 6 and 7 a Davidson ...

Page 11: ...n and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from...

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