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VXI Model VX2805C0 pages
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Heritage
The VX2805C is a fourth
generalion COTS product. The
predecessors to this module.
interfaced with iVPAX software
(abo COTS), have been used
lo accurately characterEe ritial
dynarrics for launch vehicles such
as Titan as the "turnkey" Lift
Off hstrumentatkxi System (L6AI
The VX2805C is being used h a
prestigious shock laboratory for
research and vatdation of state of
the art aocelerometers. and at the
world's largest automotive arbag
manufacturer, for the development
and lestiig of ar bags.
XI Model VX2805C
8 Channel Data Acquisition Module
Description
The Model VX2805C is
a completely integrated
8 channel data recorrJng
VXI module. Each channel
includes a bridge signal
conditioner, a low pass filter.
a 16-bit 5M Samples/sec/ch
ADC. and 16M Samples of
DRAM storage per channel.
DRAM may be divided
into 2. 4 or 8 segments for
multiple event recording.
Built-in channel conditioning
is suitable for strain gauge
bridge-type transducers and
for voltage signals. Constant
voltage excitation is
independently programmable
for each channel. Special
function signal conditioning
requirements may be
accommodated with SIPS"*
(Smart Interface Panel
System) product famlies and
controlled by the VX2805C
onboard processor.
Highlights
o 8 Channels Per Module
o Each Channel Includes Signal
Condilkx>rig. Fitter ADC and Memory
o 16-Bit Resolution
o High Dynamic Range
o Up to 5M Samples/s/ch
o SmJtaneous Samptng
o Dual Ported Memory Access al Rates <5M S/s
o 1k Snapshot Data FFO for Each Channel
o 2.3MHz 3dB Bandwidth
o Buffered Analog Output for Each Channel
o Overload Detection for Each Channel
o Excelent Ch-to Ch Phase Match
o Computer Condoled Calxation
o 16M Samples Storage per Channel
o Multi-Event Recorting
0 Digital Signal Processors
o Digital Fiters. Flat Passband. Sharp Cutoff
o kitemal and External Triggering
o Pre- and Post-Trigger Recording
o Gated Mode
o Dual Clock Rate Data Recording
o Constant Voltage Excitation
o SPS" Communication Port
o FJy Programmable
o Memory Battery Backup Capability
o Single Width. C-size. VXI Module
o Stnpie Multi-Chassis Phase Cl< & Triggering
o Permrts Multiple Chassis Expansion/Operation
o ECl Clock & Trigger Capabfcies
Input full-scale sensitivity is programmable from ±10mV to ±5V in 3dB
steps. A 16-bit ADC provides high accuracy, a high dynamic range and
resolulions from 340nV to 170u,V per count. Offset correction range is
+2.5V with 16-bit resolution. A dedicated signal processor provides superb
digital fitering. Filter Fco auto-tracks the sample rate, plus custom filter
download capabilities. Dedicated hardware may generate a trigger from
the analog signal being digitized on Channel #1 using either level and slope,
or window criteria. Trigger Holdoff may be invoked to reject threshold
crossings of short duration. Holdoff may improve triggering reliability under
noisy signal conditions.
The VX2805C auto bridge balance function may be initiated by computer command A complete end-to-end calibration of each
channel, including the transducer, may be performed by a computer calibration routine. You may use either switched or external
calibration resistors (with SPS") or the unique internal shunt emulation circuit. The shunt emulation technique provides a fast, multi-
point caDbratton check without operator intervention.
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