Elekta Neuromag NM21283A, Руководство пользователя

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Miscellaneous 11
NM21283A-A 57
11.3 Marking broken channels
Some channels can be marked broken in the start-up files. This causes that
these channels will automatically behave as if they were marked inactive
from the active channels dialog. See “Tuning selected channels” on
page 18. The flag indicating a broken channel can be toggled using menu
command
Commands > Toggle broken status
. The change of the status
flag is temporary and affects only the current session, unless the settings
are saved into the start-up file. See Section 11.5.
11.4 Reverting operating points
The program has two options to undo tuning settings. It is possible either
to return to the state which prevailed when the program was started, or to
the “nominal” operating point.
To revert settings to state at program start-up time:
1. Select File > Revert to start-up state from the menus.
To revert to the previous nominal point of operation:
1. Select
File > Revert to previous o.p
. from the menus.
11.5 Creating start-up files
To make the tuner run easily and properly, one should have two start-up
files properly set. When the program is started, it loads four files in fol-
lowing order:
1. /neuro/dacq/tuning/system.tnp (start-up script may alter this name).
2. /neuro/dacq/tuning/static.tnp (may be altered in the previous file).
3. “Current operating point file” deduced from the helium level.
4. ~/.tuneprefs containing the personal preference settings.
The first one is intended for fixed measurement parameters etc. and it
gives default values for all parameters defined in the file. It should not be
altered unless there is a need to permanently change the default values.
Usually the file delivered with the system should be ok.
The second one is a file that should contain values for “static parameters”,
that is parameters that are assumed to be independent from the operating
point, but which vary from device to device. From this file only parame-
ters in classes “static” and “state” are loaded, so it may contain also other
parameters which are neglected. See Appendix B.