Four Channels at Up to 1.25M Samples/Second/Channel Simultaneous Sampling and Channel-to-Channel Isolation

A new simultaneous sampling product protects your application from ground loops and lets you sample at very high speeds. The new product, a 4-channel signal interface (SI) module, part number MSXB 082, with four onboard analog-to-digital converters and channel-to-channel isolation, was announced today by Microstar Laboratories, Inc., maker of Data Acquisition Processor (DAP) boards and network-ready DAPservers. The four analog-to-digital converters on the new SI module are synchronized to within a few nanoseconds of each other, and each one can convert an analog signal to a 16-bit data stream at up to 1.25M samples/second. All inputs are differential, and each analog channel is isolated from all the others and from any other system component. You can set the gain of each channel to 1, 2, 5, or 10 in software, and channels can have different gains.

The MSXB 082 design allows each of four channels to sample at 1.25M samples per second. Initially the per-channel maximum is reached if only one channel is in use. With two channels in use, the maximum is 1M samples per second; with three, 667k samples per second; and with four, 500k samples per second. Planned upgrades to other system components will allow the new product to sample at full speed – 1.25M samples per second per channel – on all channels simultaneously. No changes are required to the product itself.
Onboard Intelligence

The new signal interface module joins a growing family of SI modules related to an established family of intelligent products. All SI modules are intelligent: each includes a field-programmable gate array (FPGA) programmed to communicate with, be configured by, and respond to commands from a DAP. And every DAP is intelligent: each includes an onboard processor running a real-time operating system that communicates with, is configured by, and responds to commands from a PC application. For the application you can use DAPstudio – a Microstar Laboratories product – or a third-party product, like LabVIEW. Or you can write your own. You can run the application on a DAPserver or on any PC on a network. The DAP does not have to be local to the PC that controls it. You communicate with your application on a PC – setting the channel-by-channel gains, for instance – and the software takes care of the details... right down to what happens on the SI module.

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