Metric Halo SpectraFoo - Manual (Page 75)

The Transfer Function
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Figure 4.35: Mini-menu window command pop-down menu
This menu provides the following commands:
• Save Selected Snapshots… : Select this command to save each of the selected snapshots to disk.
• Load Snapshot…: Select this command to load a snapshot file from disk.
• Remove Selected Snapshots…: Select this command to remove the selected snapshots from the list.
• Average Selected Snapshots…: Select this command to create a new snapshot from the average of all of
the selected snapshots. You can choose to weight the average with the coherence of the measurements.
If you make a number of measurements with different mic positions and create a weighted average,
you can remove the effects of local nulls and generate a more accurate measurement of the response
of the system.
• Smooth All Snapshots…: Select this command to smooth all the snapshots in the list.
• Unsmooth All Snapshots…: Select this command to unsmooth all the snapshots in the list.
• Invert All Snapshots…: Select this command to invert all the snapshots in the list.
• Uninvert All Snapshots…: Select this command to uninvert all the snapshots in the list.
• Show All Snapshots…: Select this command to make all the snapshots in the list visible.
• Hide All Snapshots…: Select this command to make all the snapshots in the list invisible.
• Ask About Unsaved Snapshots: When this item is checked, the system will ask you if you want to save
an unsaved snapshot before it is removed from memory.
Cursors in the Transfer Function window
You can put a readout cursor in the Transfer Function window by moving the mouse cursor over one of the
transfer function panels and holding down the <command> key. If the display is one of the octave analysis
modes, the cursor will snap to the center of each band. The cursors in both the power and phase panel will
move simultaneously. To move these two cursors separately, hold down both the <command> and <option>
keys. To remove the cursor from the display, move the cursor to the vertical calibration of one of the panels.