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Pentek delivers PCI multiband digital receiver

Posted: 15 Apr 2003 ?? ?Print Version ?Bookmark and Share

Keywords:pentek? model 7631? pci digital receiver? multiband digital receiver? pci mezzanine card?

Pentek Inc. has announced the availability of a 16-channel PCI multiband digital receiver that features two 14-bit 80MHz or 105MHz ADCs for direct wideband signal processing within an on-board Virtex-II FPGA.

The Model 7631 consist of a digital receiver PMC and a PMC-to-PCI adapter. It is suitable for use in applications such as radar pulse analysis and satellite communications, where traditional signal processing VME card cages are being replaced by Pentium desktop computers for host-processing tasks.

The device accepts two analog inputs on PCI slot panel SMA connectors, either from baseband HF sources or IF outputs from communications receivers. Each of the two inputs is transformer coupled and digitized by an AD6645 14-bit ADC. The sample clock is derived either from an internal crystal oscillator or an external clock supplied through a front panel SMA connector.

It also includes four Graychip GC4016 quad multiband digital receiver chips driven by the 100MHz samples from both ADCs. A crossbar switch inside each GC4016 allows all 16-receiver channels on board to independently select either of the two ADC inputs. Each receiver chip includes four receiver channels capable of independent center frequency tuning from dc to 50MHz with output bandwidths ranging from 4kHz to 10MHz.

The PCI slot panel clock/sync bus allows one 7631 to act as a master, driving the sample clock, sync and gate signals out to a front-panel cable bus using LVDS differential signaling. Up to seven slaves can then be clocked synchronously with the master. For larger systems, up to eighty Model 7631s can be synchronized with Pentek's Model 9190 Clock and Sync Generator.

The Model 7631 can be equipped with either XC2V1000 or XC2V3000 FPGA devices from the Xilinx Virtex-II family, offering logic densities of 1 or 3 million gates respectively. The FPGAs are factory-configured to perform standard modes of data packing, formatting and channel selection.





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