Enhanced Edot X System

Technical Report · Mon Jun 15 04:00:00 EDT 2009

DOI:https://doi.org/10.2172/957048· OSTI ID:957048

Smith, Scott ^[1]; Bostick, Harry

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1. Institute for Security Studies, UNLV

The capability of EdotX would be improved by increasing the instrument's dynamic range to expand the range of signals measurable by the device. The heart of the EdotX system is a two channel analog to digital (A/D) conversion card with two analog to digital converters tightly coupled to a field programmable gate array (FPGA). Signals are continually digitized by the A/D and processed by the FPGA. When the FPGA detects a trigger condition, the data are transferred using direct memory access to the host computer memory, which in turn saves the data to disk. The original design utilizes a single A/D channel for data acquisition. The task was to increase the dynamic range of the system by enabling the second A/D channel, allowing the simultaneous acquisition of the original A/D channel and the additional second A/D channel. The input signal would be fed to the original channel and to the second channel with the second channel input being attenuated. When a signal hits the maximum range of the first channel, the data from the second channel, which is attenuated, are then used. Because both A/D's acquire data simultaneously, they may be used as a single expanded dynamic range channel.

• Research Organization: UNLV Research Foundation, 8311 W. Sunset Road, Suite 200, Las Vegas, NV 89113
• Sponsoring Organization: USDOE National Nuclear Security Administration (NA)
• DOE Contract Number: FG52-06NA27513
• OSTI ID: 957048
• Report Number(s): DOE/NA/27513-F
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
ANALOG-TO-DIGITAL CONVERTERS
COMPUTERS
DATA ACQUISITION
DESIGN
EDOTX
EdotX
data acquisition equipment
field programmable gate array
two channel analog to digital conversion car