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Reconfigurable analyzers tout high-speed dual-channel sampling

Posted: 18 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:acqiris? compactpci? analyzer? acC240? ac210?

Board maker Acqiris now offers dual- and single-channel 6U-sized CompactPCI high-speed analyzers that capture and perform synchronous dual- and single-channel real-time signal processing at rates of up to 2GS/s.

This on-board processing drastically increases the level of useful data throughput, taking pressure off of the bus, making these analyzer platforms useful for applications such as signal intelligence (SIGINT), synthetic aperture radar (SAR), ultrasound and LIDAR. The Model AC240 and AC210 analyzers each host a reconfigurable on-board Data Processing Unit (DPU) for data processing, and data reduction and filtering as required in realtime applications.

FPGA-based processing
The DPU, a Virtex II Pro 70 FPGA, is capable of executing multiplications in less than 5ns and offers more than 74,000 logic cells, 328 dedicated 18bit x 18bit multipliers with 36bit results, and nearly 7Mb of on-chip processing memory.

Acqiris also offers an optional on-board processing memory extension, providing up to 512MB of SDRAM and 2MB of dual-port SRAM with a read/write throughput of up to 2GBps to and from the FPGA.

The analyzers are particularly suited for applications when direct sampling techniques are needed, and when signals must be sampled at rates up to 2GS/s (analog bandwidth is up to 1GHz).

Each analyzer input-channel features a 1GHz bandwidth front-end, and signal conditioning with calibrated gain and offset.

The AC240 offers two synchronous channels, each with a 1Gsps ADC. For single-channel applications, these can be interleaved, doubling the maximum sampling rate to 2Gsamples, and improving overall timing resolution.

The AC210 platform is billed as a more cost-effective product, featuring a single channel with a sampling rate of up to 1GS/s.

Additionally, firmware developed for the analyzers in collaboration with UK-based RF Engines Limited (RFEL) provides complex pulse frequency measurement and feedback control, making the AC240 and AC210 suitable for thing such as the stabilization of laser pulses of less than 100ns. Frequency detection accuracy is less than 3kHz (rms) over a frequency range of 40MHz to 120MHz.

- Alex Mendelsohn

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