6. SPECIFICATIONS
Display Backlit, 7 in. color touchscreen, 800 × 480 pixel resolution. Provides access to the
TCP/IP interface; and displays spectrum, stabilizer, bias, live-time, and dead-time readouts. In
addition to the control and data display screens, you may import a maximum of 9 .JPG-format
image files for timed, cyclical display.
System Gain Settings
! Coarse Gain 1, 2, 4, 8, 16, 32, 64, 128
! Fine Gain 0.5 to 1.1
The available range of gain settings supports all types of HPGe detectors. Specifically, the fol-
lowing maximum energy values are achievable using the standard ORTEC preamplifier (maxi-
mum to minimum gain):
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! COAX 187 keV–12 MeV
! GLP/SLP 16.5 keV–1 MeV
Preamplifier Software-selectable as either resistive or TRP preamplifier.
Amplifier Input Polarity Software-selectable.
System Conversion Gain Software-selectable as 16384, 8192, 4096, 2048, 1024, or 512
channels. Advanced models also include 256, 32768, and 65536 settings.
Digital Filter Shaping-Time Constants
! Rise time 0.8 ìs to 23 ìs in steps of 0.2 ìs.
! Flattop 0.3 to 2.4 in steps of 0.1 ìs.
Corrections
! Dead-Time Correction Extended live-time correction according to Gedcke-Hale
method. Accuracy: area of reference peak changes <±3% from 0 to 50,000 cps.
! Zero Dead-Time (ZDT) Correction When ZDT mode is enabled, dead-time losses are
accounted for by taking very short acquisitions and applying a correction in real time —
as the data are coming in — to the number of counts in the spectrum. This technique
allows the distribution of gamma-rays to change while the acquisition is in progress, yet
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For the legacy LO-AX and IGLET-X detector types, the respective energy ranges are 94 keV–6 MeV and
8 keV–500 keV.
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