The H2 PSL is back up and essentially where it was before the power outage. PMC and ISS are both locked, FSS is turned off due to work on servo board. We are getting 150W downstream of the PMC.
We had some issues getting the HV power supply working, it was determined that a zener diode on the PMC locking board blew, I have replaced that board with a spare.
List of relavent settings:
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Kepco HV power supply
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ILS/EOM function generator
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Channel 1 (EOM)
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Frequency: 35.5MHz
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Amplitude: 500mV_pp
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Phase shift: 86 degrees
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Channel 2 (ILS LO)
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Frequency: 35.5MHz
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Amplitude: 7dBm
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PMC/ISS function generator
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Channel 1 (PMC LO)
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Frequency: 35.5MHz
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Amplitude: 7dBm
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Phase shift: 240 degrees (50+180)
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Channel 2 (ISS AOM)
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Frequency: 80MHz
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Amplitude: 6dBm
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IFR frequency synthesizer
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Carrier frequency: 21.5MHz
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Amplitude: 10dBm
Note that the phase on the PMC LO will be reset to a different value when the function generator loses power. To set the phase, sweep the cavity by turning on the ramp in the medm screen. Look at the locking PD with a scope and adjust the phase until the sidebands disappear (there are LEMO cables labeled “SPARE” which run from inside the laser room to the racks outside). Then add 180 degrees to get the optimized phase.
For future reference:
Oscillator settings
Frontend settings