View source for Log of Problems and Solutions

== SOLVED 2-8-2012 Jitter and Flashing of 1st column in image==
'''PROBLEM:'''  On front illuminated image it was observed that the images had a flashing on the first column and that there was a pixel jitter.

'''CAUSE:'''  The pipeline in the fCRIC must first be purge before we get the real data from the CCD.  This is done in state 4 of the readout state machine.  After state 4 the readot goes to state 5 where it starts saving data.  The state machine was entering state 5 while in the middle of the data transfers started in state 4.

'''SOLUTION:'''  Extend the end time of state 4 from 96 ticks to 245 ticks.  This will prevent the system from entering state 5 until the fCRICs are done sending out their data.  Since this state is only used for 6 pixles it will not have a signifigant inpact on the total readout time.

== SOLVED 6-1-2012 Buffer chips could get more than 5V==
'''PROBLEM:''' It was possible through software to apply more than 5V to the buffer chips. This allows developers and users to issue a "Self-Destruct" command. This has been tested out and verified to work. (Too soon to joke?) 

'''SOLUTION:''' Initially there was a Software fix, but a hardware solution was implemented and was included in the final 12 boards.

== NOT SOLVED YET ==

Noise and gain not as good as we would like on the prototypes with the buffer chips.