9
the high voltage to the detector (when HV is disabled, the menu item will read “Enable High Voltage).
“Detector…” opens a sub-menu containing various utilities for working with detectors.
“Add…” allows new detectors to be added in the same manner as during URSA-II MCA startup, without the
need to shut down and re-start URSA-II
MCA.
“Remove Detector…” allows deletion of
any detector entered except of the one
currently in use.
“Select/Change…” automatically disables
URSA-II’s HV supply to allow for safe
changing of detectors. A new detector is
selected from the list in a manner similar to
that performed on
URSA-II MCA startup. Once a new detector
has been selected, that detector’s settings (hardware settings, energy and efficiency calibrations, and the last-
used ROI with that detector) are loaded and the HV enabled.
If “Disable High Voltage” is selected, URSA’s HV will be set to zero volts and the Hardware
Status Bar will display that the HV is off. This menu item will change to “Enable High
Voltage” and, if selected, will re-set the HV to the last-used hardware setting.
“Fine Tune…” opens a window to begin an automatic fine gain adjustment routine.
“Energy Calibrate…” opens a window for performing an energy calibration. See
instructions on page 32.
The next seven [QQQ] menu items (“Full Screen” through “Sample Data Panel”) are
identical in function to the seven buttons in the Button Panel on the lower right of the
Spectrum Display. Each of these opens a panel for a specific function along the bottom
of the Spectrum Display, except for “Full Screen,” which closes any displayed panel and
restores the Spectrum Display to the largest possible. The functions contained in these
panels are discussed in detail in the “Button Panel” section.
“Multi Channel Scaling Mode” disables and hides the Main URSA-II MCA window and
opens a new window for performing multi-channel scaling. This function is discussed in
detail in other sections of this Manual.
“Load ROI Set” is a redundant function (from the “ROI” panel) repeated here for
convenience.
“URSA-II COM Port…” displays which COM port URSA-II is currently connected through.
URSA-II can be used on COM 1 through COM 16.
Alarms
“Alarm Settings…” opens a window where various alarms can be set. Alarms will only be active if “Enable
Alarms” is checked. Alarms can be set for any ROI in the currently loaded ROI set or for the overall spectrum.
Alarms can be set for either a gross count rate or for an increase in gross count rate over a specified period
of time. Any two alarms can also be attached to the logical alarm outputs on the Mini DIN-7 connector. The
outputs go “high” (+5V) in an alarm condition.
Aquisition
Controls and
Indicators
Spectrum
Smoothing
