Symmetric Research has introduced two new products of interest for seismic and other precision data-acquisition applications. The first product is a one-channel 24-bit A/D system, the PAR1CH. It is a lower-cost one-channel version of the company's four-channel 24-bit A/D system the PAR4CH. The new PAR1CH one-channel system is attractive for schools and laboratory applications where one analog input channel is sufficient.

Connecting to a standard PC parallel port, the PAR1CH includes a large 2 Mb data memory buffer to ensure no data are lost during long PC or network latencies. Included with the system are both finished GUI applications to...

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