Elekta Neuromag NM21283A, Руководство пользователя

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Basic tuning operations 3
NM21283A-A 15
To save tuning settings into a file:
1. Select File > Save tunings from the menu. A dialog will pop up.
2. If the file name suggested is the one into which you want to save the
settings, press OK, if not, press
Save elsewhere
, and use the appear-
ing file selection box to select the file.
If you get an error message “Could not get clean snapshot (bad params at
ch <number>)”, this means that all parameters of the tuner are not set
properly. However you can save the settings anyway if you just need to
save the regular working point parameters. To get rid of this message,
contact your administrator to set up the start-up files to contain all
required information.
3.6 Noise display
The tuner displays normally bar diagram showing the noise level of all
channels. During fine tuning this display shows the noise after each step.
The default scale should be good in normal situations. If you need to
change the y-scale of the display, use the control buttons in the lower right
corner of the display. The buttons available are following:
Note that the autoscale button is a toggle button. If you press it once, all
following plots will be automatically scale and the scale varies from plot
to plot. To fix the scale again press the button an another time. The
autoscaling is also set off automatically if you press any other scaling but-
ton. To enter a numeric value to the scale, press the fourth button. The
whole area will change to a text box where you can enter the scale you
want to use. Pressing
RETURN
activates the new value and the icons are
shown again.
If you see a bar indicating a noisy channel and you want to know which
channel that is, move cursor over the bar and press the left button. The
name and noise level at that channel is shown in the information area. See
Figure 2.1 on page 10.
Make bars look bigger
Make bars look smaller
Autoscale bars heights
Give y-scale numerically
Table 3.1