SLAC Magnetic Measurements Date: 11-17-2017 Time: 11:22:36 Project: LCLS-II Device Type: Undulator Data Type: Serial Number: SXU_004 DATASET Number: 1 Tuning Stage: Tuning Run Number: 19 Measurement Type: Long Coil Scans Operator: YL Comment: Rotor on first poles shim signatures; pole #4