User guide

LBA-USB User Guide Document No: 11294 Page 63
the bottom of the slider, and maybe add in a little video gain and some frame
averaging to quiet the noise. You’ll be amazed at what you can see!
Beam Display
Select how the beam is displayed without changing how it is processed or how it
is stored in the frame buffer. Visually compare the currently selected Beam
Display to a beam profile stored in the Reference frame buffer. Or, compare it to
the beam with the reference added or subtracted from it. Or, simply display the
current beam added to or subtracted from the reference beam.
The choices here seem obvious, however the impact on the display may be a bit
disconcerting when first viewed. Therefore, some explanation is in order:
Current means the frame buffer location indicated in the frame counter at the
bottom of the main display window. In other words, “the frame currently in
view.” While running, then the current frame cycles.
The Reference frame is the last saved frame in the reference frame buffer or
location 0 (zero).
For 99% of the majority of users, the Beam Display will be set to Current
Alone, and will rarely be changed.
For the remaining 1%, read on:
 Current and Reference – In 2D, both Cursors and Cursor Profiles must be
enabled for this feature to operate. The Current beam alone will appear in the
display. A second profile, drawn in light gray, will also appear in the display. This
profile is a projection of the Reference beam. All projections are made from the
cursor positions.
In 3D, the Current beam will be displayed in red. The Reference will be
displayed in blue. If cursors are enabled, they will follow the contour of the
Current beam.
 Current and Current-Reference – In 2D, both Cursors and Cursor Profiles
must be enabled for this feature to operate. The Current beam alone will
appear in the display. A second profile, drawn in light gray, will appear in the
display. This profile is a projection of the Current beam minus the Reference
beam. All projections are made from the cursor positions.
In 3D, the Current beam is displayed in red. The Current minus the
Reference is displayed in Blue. If cursors are enabled, they will follow the
contour of the Current beam.
 Current and Current+Reference – In 2D, both Cursors and Cursor
Profiles must be enabled for this feature to operate. The Current beam alone
appears in the display. A second profile, drawn in light gray appears in the
display. This profile is a projection of the Current beam plus the Reference
beam. All projections are made from the cursor positions.
In 3D, the Current beam is displayed in red. The Current plus the Reference is
displayed in blue. If cursors are enabled, they will follow the contour of the
Current beam.
 Reference Alone – In 2D, both Cursors and Cursor Profiles must be enabled
for this feature to operate. The Reference beam alone appears in the display. A
second profile, drawn in light gray, appears in the display. This profile is a
projection of the otherwise unseen Current beam. All projections are made from
the cursor positions.