ORTEC Easy-MCS, Hardware User Manual

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Easy-MCS
™
Multichannel Scaler and MCS-32 (A73-B32) Software 931054C / 1213
94
!
Horiz Indicates the number of channels viewed in the larger, expanded spectrum, and
the width of the window in the small full-scale spectrum display. Displayed arrow
buttons permit expansion or contraction.
!
Vert Indicates the maximum number of counts in the vertical scale currently selected
for the large, expanded spectrum. Displayed arrow buttons permit scale changes.
!
Log Displayed button selects a logarithmic vertical scale for the large, expanded
display.
!
Lin Displayed button selects a linear vertical scale for the large, expanded display.
!
Auto Displayed button automatically adjusts the vertical scale and centers the window
around the marker in the large display for optimum viewing of the spectrum.
!
Marker The vertical line can be dragged left or right in the display by the mouse. The
vertical coordinate of the data (counts) at the marker position is displayed to the right of
center under the large spectrum. The horizontal coordinate is displayed to the left of
center under the spectrum. The horizontal scale is expressed in time, channel number
(Chan), or any units selected during calibration of the horizontal scale. The marker can be
used to mark regions of interest (ROIs), and to read out peak centroids and gross or net
peak areas within each ROI.
A.4.2. Input Control
Use SCA Input Displayed button enables use of the SCA input. See SCA and SCA IN.
Use Disc Input Displayed button enables use of the fast discriminator input. See Discriminator
and IN.
SCA: Lower, Upper Two displayed slide bars permit independent selection of the SCA lower-
and upper-level thresholds from 0 to +10 V in 4096 steps. See SCA IN.
Discriminator Displayed slide bar selects the Discriminator threshold from
!
1.6 V to +3 V in
1.5 mV steps for the IN connector. Two displayed buttons select counting of the discriminator
crossing on either the Rising Edge (positive slope) or the Falling Edge (negative slope). Two
displayed buttons select input impedance: 50
Ω
or 1 k
Ω
. See IN.