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Tower Driver CERN scope measurement March ‘05

Tower Driver CERN scope measurement March ‘05. Points of measurement. HEC quadrant structure. Signal waveforms : towers - A2, A3, A4, A5. Signal waveforms : towers – A6,A7,A8,A9. Signal waveforms : towers – A10,A11,A12,A14. Calibration signal delays in a HEC module.

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Tower Driver CERN scope measurement March ‘05

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  1. Tower Driver CERN scope measurement March ‘05 E.Ladygin

  2. Points of measurement HEC quadrant structure E.Ladygin

  3. Signal waveforms : towers - A2, A3, A4, A5 E.Ladygin

  4. Signal waveforms : towers – A6,A7,A8,A9 E.Ladygin

  5. Signal waveforms : towers – A10,A11,A12,A14 E.Ladygin

  6. Calibration signal delays in a HEC module E.Ladygin

  7. Signal saturation E.Ladygin

  8. TDB output noise waveform E.Ladygin

  9. Noise autocorrelation function E.Ladygin

  10. Summed signal E.Ladygin

  11. Conclusion 1 • Calibration signal waveforms should be computed for the time constants and amplification and compared with expected signals E.Ladygin

  12. Conclusion 2 • Calibration delay time distribution has been measured • Maximal difference between delays in a module is about 17ns • Maximal difference between delays in a longitudinal segment is about 9ns (~1.8m) E.Ladygin

  13. Conclusion 3 • Saturated signal has been measured • No surprise E.Ladygin

  14. Conclusion 4 • Noise has been measured – here is seen the big digital pickup noise, mainly 40MHz • Where is from? FEB? Trigger system by the cable to the oscilloscope? E.Ladygin

  15. Conclusion 5 • Has been found that the numbering of mixer channels is not the same on both side of FEB, there is mirror sequence • J.Ban promised that every mixer can be programmed separately • We need a cable check program for trigger chain E.Ladygin

  16. Thank you E.Ladygin

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