15.20 All ERNI pins of aida01 adaptor PCB OK => FEE64 #1 ASIC #2 channel #5 issue faulty test C? faulty ASIC channel?

      Fitted drain wire from aida06 & aida08 adaptor PCBs to FEE64 cooling plates

      n+n FEE64 1.8.W spectra 20us FSR - attachments 1-2

      p+n FEE64 1.8.W spectra 20us FSR - attachments 3

      p+n FEE64 1.8.L spectra - attachment 4
       aida01 1.8.L pulser peak width 15 ch FWHM

      n+n FEE64 1.8.L spectra - attachment 5
       double peak spectra

      Significant improvement in noise for aida06 & aida08 but still not as good as aida02 & aida04. Some additional extrinsic noise observed for aida02 & aida04.

      No change in 1.8.L spectra

      n+n FEE64 1.8.W spectra aida02 200us FSR, other FEE64s 20us FSR - attachments 6
       baseline sinusoid observed - 4T = 320 samples = 64us = 15.6kHz

15:50 BNC PB-5
      switch polarity + to -
      switch BNC cables from BNC PB-5 and EG&G Ortec 534 outputs for test +/-

      Attachments 7-8
       baseline sinusoid observed for p+n *not* n+n FEE64 1.8.W spectra
       suggests issue is EG&G Ortec 534

      Restore original cabling



16.55 Swap aida09 HDMI cable from MACB #4 port 1 to MACB #5 port 1 - power cycle and restart - no change - aida09 clock not locked

      Replace aida09 HDMI with *new* HDMI cable to MACB # 4 port 1 - power cycle and restart - aida09 clock locked


      FEE64 temperatures OK - attachment 9

      System wide checks - attachments 10-15
      OK *except* cannot calibrate aida12 ADCs

      per FEE64 rate spectra - attachment 16

      p+n FEE64 1.8.L spectra - attachments 17
       aida01 1.8.L pulser peak width 15 ch FWHM

      n+n FEE64 1.8.L spectra - attachments 18
       double peak spectra

      p+n FEE64 1.8.W spectra 20us FSR - attachments 19-20

      n+n FEE64 1.8.W spectra 20us FSR - attachments 21-22


17.10 n+n FEE64 1.8.W spectra 200us FSR
       BNC PB-5 decay time 50us - attachment 23
       BNC PB-5 decay time 1ms - attachment 24


18.05 ADC data item stats

      slow comparator 0x64 -> 0xa
      BNC PB-5 pulser frequency 100Hz so expect rate of ADC data items per FEE64 to be c. 6.4kHz
  
      attachment 25 - aida06 & aida08 ground from FEE64 cooling plate to adaptor PCB fitted, test - connected to aida02, aida04, aida06 & aida08
      attachment 26 - aida06 & aida08 ground from FEE64 cooling plate to adaptor PCB fitted, test - disconnected from aida02, aida04, aida06 & aida08
      attachment 27 - aida06 & aida08 ground from FEE64 cooling plate to adaptor PCB not fitted, test - disconnected from aida02, aida04, aida06 & aida08

      Rev A adaptors require grounding (as expected). Output of EG&G Ortec 534 produces c. 15kHz sinsusoid at test input - cable length/capacitative load?