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AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

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Entry time:

Wed Jun 8 09:55:28 2022

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10.30 : Turn off AIDA FEE64s

Prepare a ground cable for snout - M10 terminal on one end for copper bar. Will affix with Cu tape for now (no free screws)

Plan for today:

Remove extraneous ground cables
Check ground of all FEE64s esp. 05 and 07 - include on FEE64 side.
 14:42 - Done all grounds seem snug, extra ground cables removed. Try power on and check

Try powering just DSSD1 FEE64s
 - No change (aida01 125k, aida02,03,04 - 400k)

Try grounding snout
 14:59 Connection to snout very bad as tape does not fix well to thick copper in braid. nO difference either way.

Probe PSU output with Battery DSO if available
 - See figure 2

Try shuffling FEE64 power allocation
 - 15:32 - Now as 1 X 3 X 2 X 4 X
                  5 X 7 X 6 X 8 X
(Also FEEs on own pair)
   No difference to rates

Multimeter voltages for last socket of PSU1 (paired with aida04):
  1 : 6.02 V
  2:  6.02 V
  3:  6.02 V
  4: -6.44 V
  5:  7.74 V

Similar on PSU2

Voltage between right (GND) pin 5 and 1 (pin 5 is COM) is -0.4 V, similar if pin 4 is COM. Pin1-3 are 0 V when paired

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