EISA A/D Boards "Stream" 12-Bit Data to Memory at 10MHz with No Lost
Samples

Problem of "Where to Put the Data" Is Overcome

As data-acquisition boards for personal computers relentlessly move to
higher resolutions (>12 bits) and faster speeds (>2MHz), users are finding
limitations in how to transfer and store all the data. On-board memory
fills up very quickly, and most popular data buses (with the exception of
VME, see Sidebar) can not transfer data as fast as the newer
analog-to-digital (A/D) converters produce it.

DATEL's new PC 415 Family of high-resolution (12 or 14 bits), high-speed
(to 10MHz), analog input boards for EISA (Extended Industry Standard
Architecture) computers exploit a unique architecture that allows them to
store 2 A/D samples with each 32-bit EISA-bus transfer.

The PC 415's A/D converter(s) digitize data directly into their on-board, 8
ksample FIFO (first in first out) memories. As the FIFO's fill, data is
sent in "bursts" to the host (either disk or RAM) at rates up to 14
megasamples per second.

Unmatched Performance in "Streaming-Data" Applications!

In very long "baseline" studies or in analysis of high-speed transients,
the PC-415 can continuously collect "seamless" data, with no lost samples,
and stream that data to EISA memory at speeds up to 10MHz until memory is
full (64 megabytes or greater).

The PC 415 also has an industry-standard, 32-bit, 10MHz, parallel port for
"non-bus" data transfers to third-party memory boards or array processors.
The board makes an excellent array-processor "front end."

Local Housekeeping Relieves Host!

Extensive automation keeps the PC-415 running without tying up the EISA
host. The A/D-converter can be clocked using either the low-noise crystal
oscillator, the high-resolution frequency synthesizer or external clock
signals. There is also an analog trigger whose variable threshold is set
by an on-board 1 2-bit D/A converter (which can also be used as a
general-purpose analog output). A sample counter sets a repeating frame
length of up to 16 million samples.

A digital "marker" feature "tags" samples on the fly. In pretriggered
applications that use circular memory (ring buffer), the tagging can
identify external events without interrupting data collection.

Low-Noise, Low-Distortion Front Ends Appeal to Many Applications

The PC-415 is intended for high-end data acquisition systems that also
demand high data quality. Applications include ultra-fast data acquisition
systems, transient capture and analysis, shock and vibration testing,
radar/sonar digitization, satellite demodulation, digital signal
processing (especially FFT's), engine test cells, medical diagnostic
imaging, and high-end graphic scanning.

A Complete Family of Products

Up to 16 channels can be combined with 12 to 14-bit A/D resolution and
sample rates to 10MHz. 2/4/8-channel simultaneous sampling options
eliminate phase skew on multiple channels.

Software Support

PC-415 software includes a windowed, menu-driven setup and configuration
library which saves A/D data to memory and/or disk for later analysis by
popular math packages and spreadsheets. This software also runs as a "no
programming" front end to user-written code. Either MS-DOS (PC 415SET) or
Microsoft WINDOWS (PC 415WIN) versions of this executable software are
available at $95 each. Full source code is $395.

Price and Delivery

Single quantity pricing starts at $1,925 for the 4-channel, 12-bit, 1.6MHz
system (PC 415C1). The single-channel, 12-bit, 10MHz model (PC 415H1) is
priced at $2,495. All models are available from stock to four weeks.

Datel Inc
11 Cabot Blvd
Mansfield, MA 02048
508-339-3000,  fax 508-339-6356

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