Digital Receiver Handbook: Basics of Software Radio

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Digital Receiver Handbook: Basics of Software RadioProductsDual FPDP Adapter with Virtex-II FPGAs - VIM-2Model 6250Figure 38While not actually containing a digital receiver, theModel 6250 Dual FPDP Adapter in Figure 38 supportsvery high-performance custom signal processing functionsby incorporating two high-density FPGAs.Two bidirectional FPDP ports transfer 32-bit dataat clock rates up 40 MHz. Support for FPDP-II portsallows clock rates as high as 100 MHz (400 MB/sec.)The FPDP inputs are connected to two XilinxVirtex-II FPGAs with densities of either 1 or 3 milliongates each (XC2V1000 or 3000). The FPGAs are clockedfrom an on-board 100 MHz crystal oscillator. Factorydefault FPGA configuration code includes the FPDPinterface and the VIM interface so standard units can beused as fast FPDP adapters.Custom FPGA configuration code can be developedusing the optional GateFlow FPGA Design Kit containingthe VHDL source for the factory default configurationand provisions for adding user-defined algorithms.Each FPGA is equipped with two 64k x 16 SRAMs forstoring data or coefficients, creating a more powerfulenvironment for custom FPGA applications andincorporation of third party IP cores.Pentek’s GateFlow IP Core Library includes realtimeFFTs, wideband digital receivers and pulse compressorswhich can be used with the GateFlow DesignKit or ordered as factory installed options. Visit Pentek’sGateFlow Resources website for the latest information atpentek.com/gateflow.Pentek’s family of 68xx A/D converters deliversampling rates from 215 MHz to 2 GHz and featureFPDP outputs completely compatible with the Model6250. Since the 6250 can also transmit FPDP data, itcan be connected to many other Pentek productsincluding digital receivers, A/Ds and DSP boards.32Pentek, Inc. • One Park Way, Upper Saddle River, NJ 07458 • Tel: (201) 818-5900 • Fax: (201) 818-5904 • Email: digrec@pentek.com • http://www.pentek.com
Digital Receiver Handbook: Basics of Software RadioProductsDual FPDP Adapter with Virtex-II Pro ro FPGAs and SDRAM - VIM-2Model 6251Figure 39The Model 6251 is the next generation successor tothe popular 6250 shown on the previous page.Major new features of 6251 are two Virtex-II ProFPGAs that replace the Virtex-II devices with twice theresources plus two embedded PowerPC microcontrollers.In addition, the four 128 kB SRAMs on the 6250have been replaced with 64 MByte SDRAMs on the6251, increasing the memory capacity of the module bya factor of 256.These larger memories can now support long digitaldelay lines and large data buffers for transient captureapplications. The 16 MB FLASH memories can be usedfor coefficient or boot code storage for the embeddedmicrocontrollers.The FPGA sizes range from the XC2VP20 to theXC2VP50 to handle a wide range of applications.A GateFlow FPGA Design Kit is available forcustom algorithm development. It includes all theVHDL source code for the standard factory functionsand library functions to support the SDRAM memory.When used in conjunction with FPDP data sourceslike Pentek’s Series 68xx A/D Converters, the 6251 offerssignificant signal processing horsepower.Pentek’s GateFlow Wideband Digital Receiver IPCores 421 and 422 can be used to provide high-speedand high-dynamic range digital downconversion.GateFlow FFT IP Cores 401 and 404 deliver world-class,real-time time-to-frequency domain conversion. TheGateFlow Pulse Compression IP Core 440 handles realtimeradar pulse compression with block-floating pointprecision. Visit the GateFlow Resources website atpentek.com/gateflow.33Pentek, Inc. • One Park Way, Upper Saddle River, NJ 07458 • Tel: (201) 818-5900 • Fax: (201) 818-5904 • Email: digrec@pentek.com • http://www.pentek.com
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Digital Receiver Handbook: Basics of Software Radio

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