Touting unprecedented storage-depth and speed, Ultraview's (Orinda, Calif.) latest PCI bus data-acq board packs several times the storage depth of prior A/D converter boards from the company.
Capable of continuously acquiring two simultaneous channels, each running at up to 800-Megasamples/s, and storing up to 4-Gsamples of uninterrupted data on each, the Model AD8-650x2DMA's offers extreme memory depth (record length). Ultraview claims that this memory depth will actually enable new classes of continuous
surveillance, intelligence gathering, and single-shot testing applications.
High Speed DMA Transfers
While the board is acquiring its dual streams of data (each at 800-Msamples/s into 8-Gbytes of on-board memory) its 64-bit 66-MHz PCI DMA engine concurrently transfers data from memory to your PCI host. It can do this at better than 300-Mbytes/s.
When tested in 64-bit Sun Microsystems SunBlade2500/2000/1000 and Ultra 80, E250 and E420/450 systems, the AD8-650x2DMA board acquired analog waveforms continuously at an aggregate rate of 1.6-Gsamples/s, while simultaneously performing a sustained DMA (bus mastering) transfer to host system memory at approximately 320-Mbytes/s. That level of performance supported uninterrupted acquisition and analysis of gigabytes of wideband analog data.
Designed for low-jitter operation, the externally triggerable AD8-650x2DMA can operate with an internal or external clock, at any frequency from 1-M-Hz to 800-MHz. The board's 50-ohm clock input can also accept the external sine or squarewave clock.
The AD8-650x2 DMA has 50-ohm inputs (using SMA connectors), and can measure signals with full-scale amplitudes of ±350-mV. A 50-ohm AC-coupled trigger input can accept either PECL or ECL levels, or any positive-going edge having a 1-V swing, and any DC offset between -5-V and +5-V.
A Low-Cost Architecture
According to Ultraview, previous A/D boards with sampling rates above 500-Mbytes/s could only acquire up to approximately 512 Mbytes of data continuously, and these boards were generally expensive.
Now, however, due to the AD8-650x2DMA's low-cost architecture, ultra-deep GHZ-speed signal recording is available for under $10,000 in typical OEM quantities. Much of that cost-effectiveness accrues to the plug-in's use of eight standard low-power 1-Gbyte SDRAM DIMMs.
Incoming A/D samples are automatically stored in the RAM, which can be simultaneously transferred to host RAM for access by a system CPU, or a host's disk-I/O system. That supports continuous sampling up to many gigabytes of analog data.
Included software, in C, permits waveforms to be either displayed in STS Scientific and technical Software's Xview program, or to be continuously stored to system memory or disk (Xview is for analysis and post-processing of data, using operative deformation visualization and animation. Xview lets you generate or import a 3-D geometry, and to associate experimental data to geometric nodes). Any mix of pre-trigger and post-trigger recording can be specified.
Ultraview also offers a multi-board synchronization package for dual-channel acquisition tasks. Internal and external clock and trigger circuitry lets a group of AD8-650x2 boards be time-locked to a common clock to acquire signal data in tandem.
The company's AD8X2BRDG package, with cabling, software, and clock and trigger signal splitters (for dual-board/4-channel and 4-board/8-channel) concurrent sampling is available. It supports multi-channel simultaneous sampling applications.
This board also touts a common user interface. Indeed, the new AD8-650x2DMA has a similar interface to that of Ultraview's existing AD8-1250DMA, ADDA12-100 and AD8-100DMA boards.
That commonality supports upgrading to higher speed applications. The software interface also lets you write software for all PCI bus SPARC platforms that run Sun's Solaris 8, or 9 UNIX. A Linux software package is expected later this year.
Single-unit pricing for the AD8-650x2DMA is less than $14,000. That price includes drivers and sample C programs for running on Solaris 8 and 9 UNIX platforms. Pricing for the optional dual-board bridging package is $995.
Ultraview Corp., 34 Canyon View, Orinda, Calif. 94563. Phone: 925-253-2960. Fax: 925-253-4894. E-mail: email@example.com
Or, visit Ultraview's Web site for more info on this and related products.