Application #1: Application required 18 simultaneously sampled filtered channels streaming to disk using Windows NT for two hours. Each channel had to be sampled up to 200 kS/s giving a total system throughput of 3.6 Msamples/S.

Solution #1: The following components were selected: · PowerDAQ PD2-MFS boards (6 channels per board) · 32K FIFO Upgrade for each board · PowerDAQ multi-board internal synchronization cable · PowerDAQ stream-to-disk multi-board software · PD-SCXU Anti-Aliasing Filter Unit (18 channels per unit) · 18.2 GB SCSI drives for each PowerDAQ board · 4 GB IDE Drive for Windows NT · 128 MB RAM · Dual Pentium II-400

External anti-aliasing filters: PowerDAQ SCXU software was used to configure the external anti-aliasing filters. The cutoff filters could be programmed from 2 Hz to 200 kS/s. Once programmed, the unit stored these values in an E2PROM for use each time it was powered on.

Configuring the hardware: The PowerDAQ stream-to-disk software detected the three boards, created three data files, one for each SCSI drive, and performed the streaming continuously under Windows NT. The source code in C allowed the customer to integrate this into the final user application.

Application #2: Application required 64 simultaneously sampled channels and simultaneously output 64 analog channels using LabVIEW for Windows NT.

Solution #2: The following components were selected: · PowerDAQ PD2-MFS 8 channel boards (8 boards were required) · 32K FIFO Upgrade for each board · PowerDAQ 32 channels analog output board (PD-AO-32/16) · PowerDAQ multi-board internal synchronization cable · PowerDAQ LabVIEW driver and multi-board VI · 19" rack PC with 19 slots (10 PCI and 9 ISA) · 9.1 GB SCSI drive for Windows NT and data files · 128 MB RAM · Dual Pentium II-450

Configuring the hardware: The eight PD2-MFS boards and two PD2-AO-32/16 boards were installed in one passive back plane rack mount PC. The internal synchronization cable was used to clock/synchronize all the boards.

Using LabVIEW for Windows and the PowerDAQ LabVIEW driver, the PowerDAQ multi-board VI was configured for the eight PD2-MFS boards and the two PD2-AO boards. The VI was then able to acquire the 64 channels into LabVIEW and simultaneously output 64 channels.

UEI is ready to assist you in any custom solutions. We have experience in high channel count, high-speed streaming solutions using for example Visul C++, Borland C++ and LabVIEW.