Accession Number : ADA302413

Title :   Radio LAN Acquisition Module (RLAM), Recent Developments for High

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA

Personal Author(s) : Von Der Heydt, K. ; Eck, C. F.

PDF Url : ADA302413

Report Date : MAY 1995

Pagination or Media Count : 83

Abstract : During a recent experiment (April 1994), for the ONR Sea Ice Mechanics Initiative (SIMI), a portable data acquisition system was assembled that included 2 new developments. The first consists of a board, designed for the ISA PC bus incorporating 8 - 24 bit sigma-delta analog to digital converter (ADC) channels with 20 bit rms dynamic range. Among the features are programmable bandwidth to 1500 llz, low power dissipation, digital anti-alias filtering, and a "floating point" mode resulting in a 16 bit word. Secondly, since the telemetry of data at continuous rates in excess of 1O0Kbytes/s was required, hardware & software was developed to use a wireless LAN to network 3 sites up to 5km distant from the data recording system. Details of the system along with test data are described.

Descriptors :   *LOCAL AREA NETWORKS, *ELASTIC PROPERTIES, *ACOUSTIC DETECTION, *DATA ACQUISITION, *SEA ICE, COMPUTER PROGRAMS, LOW POWER, DATA PROCESSING, DIGITAL SYSTEMS, EXPERIMENTAL DATA, ACQUISITION, CRACKING(FRACTURING), GRAPHS, RATES, DISSIPATION, MODULAR CONSTRUCTION, HIGH RESOLUTION, ICE MECHANICS, RECORDING SYSTEMS, CHARTS, FLOATING POINT OPERATION, DYNAMIC RANGE, CONVERTERS, TELEMETER SYSTEMS.

Subject Categories : Snow, Ice and Permafrost
      Computer Systems
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE