Elekta Neuromag NM21283A, Руководство пользователя

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9 Tuning procedures
52 NM21283A-A
The “Tune(gate)” mode adjusts only gate values. Bias and offset values
are left intact.
9.2 Tuning based on characteristics
The tuning mode “Tune(offs)” differs considerably from the tuning modes
described in the previous section. Instead of measuring the noise level, it
measures the I-
curve, and adjusts the offset so that the curve meets an
predefined criterion. The “fraction” parameter describing the level at
which the I-
curve crosses the zero level is adjusted so that it matches
the value defined for the nominal operating point. Only the offset settings
are changed.
9.3 Manual tuning
To perform manual tuning, the tuning program provides a special mea-
surement mode “Manual tune”. This is optimized for manual operation so
that the measurement speed and update frequency are maximized. No
adjustments are made automatically. You can alter the settings using the
controls in the upper left corner of the user interface.
Φ
Φ