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- From Cavity BPM Calibration - Main, launch the Calibration Data Acquisition...display.
- Select the BPMs and plans planes you want to acquire data for by clicking individual boxes or using the Select all..., Deselect all... buttons.
- Set the scan range (0.2 mm is the default).
- Open the Acquire calibration data... display, which will prompt you to confirm by pressing the Start scan button.
This launches a matlab script which will turn off the UND launch feedback, move undulator girders and/or LTU correctors (depending on which BPMs you've selected), acquire data, and return teh the UND launch feedback to its initial state. The scan will take <1 hr (exact time depends on the number of BPMs selected). This requires beam to the main dump for the duration of the scan. If beam to the dump is interrupted during the scan, the script will pause and wait for your input before resuming.
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