The XH Series High Speed Data Acquisition board line and the XM series Multifunction Analog I/O board line for the PXI platform from Exacq Technologies provides users with a board designed for glitch-free capture and playback of analog signals. Both the XM and XH series use a 143-MHz 32-bit digital signal processor, PCI bus mastering, and 16 Mbytes of onboard memory. The price of the XM Series ranges between $795 and $1,295 and the price of the XH Series ranges between $1,395 and $1,995.
"The DSP technology used in both series was originally developed for video acquisition," says Tom Buckley, director of sales and marketing at Exacq, a company that has a background in the video marketplace. "Now we are just streaming large amounts of data onto a PC instead of video," says Buckley. "There is very little difference between capturing video and capturing data signals."
Exacq also includes a large amount of free software with its products. With the XH and XM Series, users can take advantage of at least four free programs. Exacq Bench gives users many measurement tools; Exacq SDK provides users with different types of source code; Exacq XL puts data into Microsoft Excel; and Exacq Control Center is a configuration utility for all Exacq programs.
"The software that comes with it is great," says Harry Delaney of Geotest Inc. (Irvine, CA). He has used the product and describes the data acquisition boards as "flexible," and was also fond of the manual included with the boards. "In the write-up, they go through the mathematical calculations on the use of the Fast Fourier Transforms," says Delaney. "I haven't seen anything where a vendor shows how they capture and use signal processing. They are very well-documented."
The XH Series has 12 different products, all of which have dual analog inputs offering simultaneous 20 million samples/sec/ channel or up to 25 million samples/sec for each single input. The output offers simultaneous 20 million samples/sec/output or 40 million samples/sec on a single ouput.
The XM Series has 16 different products, each offering up to 32 digital I/Os synchronous with analog I/O, up to 1 million samples/sec maximum sampling rate, and 16-bit A/D resolution.