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PCIe-Based 2-Channel, High-Speed Digitizers Hit 1.5 GHz per Channel

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A new PCIe-based wideband A/D board captures two synchronized analog channels at sampling rates up to 1.5 GHz, or one channel at up to 3 GHz when interleaving the ADC data. 1 Gbyte of onboard memory configured as a large FIFO and a PCIe x8 bus ensures the PX1500-2 from Signatec can continuously sustain long recordings at up to 1.4 Gbyte/s through the PCIe x8 bus (both mechanical and electrical) to PC disk storage without any break in the analog record.

The PX1500-2 can be set up to use either a transformer-coupled front end or an amplifier connection. The transformer connection can only be set for AC-coupled operation and has a frequency capture range of 5 MHz to 2 GHz. The amplifier can be set for either AC-coupled or DC-coupled operation with a frequency range of up to 1 GHz.

Beyond its high-speed, multi-channel performance capabilities, the PX1500-2’s frequency synthesized clock allows the ADC sampling rate to be set to virtually any value from 200 MHz—the minimum allowable ADC clock—up to 1500 MHz. Additional divide-by-2 circuits are provided for sampling at even lower frequencies. This frequency selection flexibility comes at no cost to the acquisition clock quality/performance when locked to either the onboard 10 MHz, 5 PPM reference clock or to an externally provided 10 MHz reference clock. The ADC may also be clocked from an external clock source. 

Up to three PX1500-2 boards may be interconnected in a Master/Slave configuration via a ribbon cable that connects at the top of the boards. In this configuration, the clock and trigger signals from the Master drive the Slave boards so that data sampling on all boards occurs simultaneously. Up to 18 boards can be set up for fully synchronized operation by utilizing the SYNC1500-6 as the clock and trigger source for six master boards, where all 18 boards can function synchronously even when placed into different PC chassis. This scalability of chassis and system resources allows for increasing the sustained data rate per channel for high-speed signal recording and/or real-time processing applications.

Signatec, Newport Beach, CA. (949) 729-1084. [www.signatec.com].