Mayank, Sheila, Camilla

After the adjustments to the ADF SQZ phase servo 83381, we had some issues will it railing at the start of the lock, so it was turned off 83393.

Today Sheila re-cabled the phase at the SQZ racks so that we're now using RF3 rather than RF6. The expectation is that the ADF phases we set are changing with thermalization and RF3 should have the ADF I and Q signals centered on zero with no offsets.  The SQZ angle is still controlled via the same RF6 medm channels but its really adjusting the 3MHz.  

• Inital cabling (using RF6): 
  • 25-2 goes from 6 MHZ to CLF phase shifter
  • 30-2 goes from 3 MHz right to LO demod (with extra cable length)
  • 215 goes from phase shifter chain to CLF demod
• Final cabling (using RF3): 
  • 25-2 now goes from 6MHz to CLF demod
  • 30-2 now goes from 3MHz to phase shifter
  • 215 now goes from phase shifter chain to LO demod
• Photos attached

After this we turned off the H1:SQZ-ADF_OMC_TRANS_DEMOD_{I,Q}_OFFSET and put H1:SQZ-ADF_OMC_TRANS_Q_NORM back from 4.5 to 1. Then we scanned the SQZ angle with ezcastep H1:SQZ-CLF_REFL_RF6_PHASE_DELAYSTEP -s 15 '+74,28' and H1:SQZ-CLF_SERVO_IN2POL sign NEGATIVE to get a new data set to fit to. For good SQZ, CLF sign left at negative with SQZ angle at 185deg.