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Who am I?

Who am I?. Daniel Kirby Carnegie Mellon University Physics Class of 2013 In Hall A July-August 2011 Task 1: Development of automatic level translator testing for upcoming Apex experiment. Figure 1: What a Level Translator Does. Level Translator Problems. Dead Channels Crosstalk

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Who am I?

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  1. Who am I? • Daniel Kirby • Carnegie Mellon University • Physics Class of 2013 • In Hall A July-August 2011 • Task 1: Development of automatic level translator testing for upcoming Apex experiment Figure 1: What a Level Translator Does

  2. Level Translator Problems • Dead Channels • Crosstalk • False re-start signals Figure 2: A Level Translator with a false re-start signal

  3. Level Translator Testing Method

  4. Figure 3: My Setup

  5. Pattern Firing and Analysis • Fire pre-selected series of patterns that exhaustively tests the level translator’s channels. • Check against output recorded by TDC, particularly check whether something fired when it shouldn’t have, didn’t fire when it should, etc AND timing.

  6. FPGA Bitmap Pattern Manipulation Figure 4: Pattern 1 Figure 5: Pattern 2

  7. Analysis Output (on a good day)

  8. When Something Goes Wrong (Part 1)

  9. When Something Goes Wrong (Part 2)

  10. Questions?

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