Pentek Inc. released a complete software radio transceiver module suitable for connection to IF or RF ports of a communication system. The Model 7140 PMC module combines both transmit and receive capabilities with Virtex II-Pro field-programmable gate array (FPGA)and supports the emerging VITA 42 XMC standard with optional switched-fabric interfaces for I/O. This module is also available in a variety of form factors including PCI, 3U and 6U cPCI and a PMC conduction-cooled version.
The front end of the module accepts two +4dBm full-scale analog RF inputs and transformer-couples them into 14-bit A/D converters running at 80 or 105MHz. The digitized output signals pass to a Virtex-II Pro FPGA for signal processing or routing to other module resources. These resources include a quad digital downconverter, a digital upconverter with dual D/A converters, 512MB DDR SDRAM delay memory and the PCI bus. The FPGA also serves as a control and status engine with data and programming interfaces to each of the on-board resources. Factory-installed FPGA functions include data multiplexing, channel selection, data packing, gating, triggering and SDRAM memory control.
Digital Up/Down Converters includes a Texas Instruments' (TI) Graychip GC4016 quad digital downconverter along with a TI DAC5686 digital upconverter with dual D/A converters. Each channel in the downconverter can be set with an independent tuning frequency and bandwidth. Channels may also be combined to increase bandwidth up to 10 MHz. The upconverter translates a real or complex baseband signal to any IF center frequency from DC to 160 MHz and can deliver real or complex (I+Q) analog outputs through its two 16-bit D/A converters. The digital upconverter can be bypassed for two interpolated D/A outputs with sampling rates to 500 MHz. A clock/sync bus allows synchronization of local oscillator phase, frequency switching, decimating filter phase and data collection among multiple Model 7140s.
The GateFlow FPGA Design Kit provides designers with all VHSIC Hardware Description Language (VHDL) source code and device configuration for the basic factory-installed functions to facilitate the addition of custom algorithms. Pentek's ReadyFlow Board Support Libraries of C-callable device functions for the processor platform are supplied with all I/O modules.
Pentek :
www.pentek.com,
