Page History

...

Remember to document your work for each of the carriers here. Make sure you specify the digital board used as well. The carrier identified is printed on the strong back while the digital board identifier is printed on the PCB.

Important note : Before you start with the tests, remember to cover the sensors with some thick metal (aluminum of the case of the carrier) to get consistent results.

This test is composed of 4 steps:

1. Generate eye diagram (error scan) for each lane
2. Check charge injection
3. Check laser
4. Check BIAS as low as -50V

For laser, you would need to use the cross laser or any other. set the voltage to 5V and the max current to 20mA. Then you would need to collect dark, then enable it, and simply point the laser to the ASIC and run a software trigger, and finally see the image.

For BIAS, you would need to connect the Keithley rear port to the HV_BIAS and HV_GND of the detector power BNC cables. Set the max compl current to 105mA, and gradually reduce the bias starting at -1V to -50V following the table below. 

BIAS measurement table template