ORTEC DSPEC Pro, Руководство пользователя по оборудованию

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DSPEC Pro
®
Digital Gamma-Ray Spectrometer User’s Manual 794380D / 0914
1
Patent pending.
2
Patent number 6,327,549.
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1.1.2. Proven Technologies of the DSPEC Family
High-Speed USB Interface Connect the DSPEC Pro via high-speed USB to any computer
running under Microsoft
®
Windows
®
8, 7, or XP
®
SP3. A nearly unlimited number of DSPEC
Pros (as well as any combination of other ORTEC USB instruments) can be connected to your
computer via USB hubs (and across the network). As an ORTEC C
ONNECTIONS
multichannel
buffer (MCB), DSPEC Pro works in both standalone and networked configurations.
Low-Frequency Rejector (LFR) Filter Uniquely designed for mechanically cooled HPGe
detectors, our Low-Frequency Rejector
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digital filter surpasses all signal processing methods for
reducing the effects of microphonics, ground loops, and virtually all other sources of periodic
noise for HPGe and NaI(Tl) spectrometry.
Zero Dead-Time Correction The DSPEC Pro features our innovative ZDT™ mode of opera-
tion, an alternative to the classical “extended-live-time clock.” The ZDT method produces accu-
rate results in all situations and completely overcomes some of the shortcomings of extended
live-time methods. Moreover, the new ZDT method overcomes some limitations in previous
“loss-free” dead-time correction methods. Most notably, the ZDT mode does not require any
manual adjustments and is capable of computing the statistical uncertainty of the corrected
spectrum.
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Single-Cable Connection to Detectors DSPEC Pro uses the unique ORTEC Detector Interface
Module (DIM) for single-cable connection between the DSPEC Pro and the detector. The DIM
is designed to supply bias close to the detector so the cable carries only signal and low-voltage
power — no longer is high-voltage bias, and its associated dangers, carried over long distances.
SMART-1™ Support Detectors equipped with the SMART-1 technology have their recom-
mended bias values preset at the factory. No more shuffling through paperwork or looking for
tags on the detector to find the right bias setting. Simply turn on the electronics and the
SMART-1 detector senses the detector temperature and applies the right high-voltage bias.
Our SMART-1 detectors also allow our more recent MCBs, such as the DSPEC
®
-50 and digi-
DART, to monitor and display detector state of health (SOH) during acquisition, including
detector temperature, preamplifier power, bias overrange, and bias on/off state. This continuous
SOH monitoring ensures the integrity of the acquired data. A quick check of the SOH flag in the
SMART-1 detectors shows if any parameter deviated from specification during the measure-
ment. This is vitally important for environmental samples that must be counted for long periods
of time and regulatory-driven samples where chain-of-custody integrity means everything.