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Figure8.9: Configuration of NMR Auto Lock
1 When locking in Auto Lock mode, either the Field (default) or the Shift (optional)
can be adjusted for achieving the resonance condition.
2 Auto lock may keep the actually set lock phase or the lock phase can be
calculated by the auto lock algorithm.
3 Configuration of the Auto Lock algorithm. The recovery deviation influences the
delay between FFA (pulsed experiment) and locking in.
4 This factor is evaluated by the automatic H0 calibration (invoked on the Field
Lock Control Page). It can be set manually, e. g. for resetting the calibration
(default = 1.0).
5 There are three different algorithms for the automatic lock phase optimization
available:- the classic iterative lock level optimization (maximum search)-
calculating the lock phase from the FFA data- a more precise version of the lock
level optimization (slope evaluation).
6 For precise phase measurement, the spin system has to be relaxed. This
relaxation delay is configurable.
7 The phase offset may be automatically calibrated (invoked on the Field Lock
Control Page) or manually set here.
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