Pentek's New Digital Transceiver with Multiband DDC Core and Interpolation Filter Supports all Communication Bandwidths

Complete software radio system; Unique Quad DDC IP Core combines narrowband and wideband functions; Input and output signal bandwidths from 8 kHz to 40 MHz; Decimation range from 2 to 65,536 and interpolation range from 2 to 32,768.

Denver, CO, December 19, 2007 --( SDR Technical & Product Exposition Pentek, Inc., a pioneer in VME board-level technology, today released its Model 7142-428 Digital Transceiver with a Multiband Digital Downconverter (DDC) and Interpolation Filter. A complete software radio system in a COTS PMC/XMC module, this latest offering from Pentek combines proven hardware and a new GateFlow IP core. It is a complete software radio system in a COTS PMC/XMC module. It employs four A/D converters and one D/A converter capable of bandwidths exceeding 40 MHz for connection to HF and IF ports of communications or radar systems.

In a transceiver, the decimation factor and interpolation factor determine the ratio between the IF frequency and the bandwidth of the received and transmitted signals. By offering a range of more than four orders of magnitude for both decimation and interpolation, the Model 7142-428 addresses an unprecedented range of commercial and military communication systems.

These include voice-band systems with 8-kHz channels, through 1G, 2G and 3G wireless waveforms, and even the new emerging 4G standards with bandwidths to 20 MHz and higher. Worldwide markets for wireless Web access for both fixed and mobile digital services are fueling numerous wireless standards, each with unique signal requirements easily handled with this new product. The highly programmable bandwidths offered in the Model 7142-428 also make it ideally suited for military software defined radio systems that require flexible hardware capable of emulating multiple radio waveforms.

"To summarize, we’ve taken a proven Pentek product, our Model 7142, and increased its performance to accommodate the growing number of communications standards our customers are looking for,” says Rodger Hosking, vice president, Pentek. "The decimation and interpolation ranges in our Model 7142-428 cover virtually every requirement we’ve seen so far. Furthermore, this versatile new product can support systems being developed for new wideband radar and communication standards," he added.

"Because the Model 7142-428 incorporates highly optimized, world-class FPGA IP cores fully supported with software drivers, our customers can eliminate FPGA development risks, and get their systems to market on time," concludes Hosking.

Commercial DDC ASIC offerings are divided into two classes by their decimation range: above 32 for narrowband devices and below 32 for wideband DDCs. This limitation often forces customers to choose between DDCs or to use two devices to handle both classes.

Instead, each of the four DDCs in the 428 IP core is implemented as two cascaded DDC stages, each with a programmable decimation of 1 to 256. Because the decimations from the two stages multiply, users can choose an overall decimation anywhere from 2 to 65,536. As a result, each of these “multi-band” DDC cores spans the decimation range of both wideband and narrowband DDCs, all in a single device.

The four down-converted DDC outputs are delivered to the PCI interface through independent FIFOs, each managed by its own DMA controller channel to simplify programming and improve data transfer rates.

On the upconverting side, a Texas Instruments DAC5686 offers a 500-MHz 16-bit D/A converter and a digital upconverter (DUC) operating at a sample rate of up to 320 MHz. The DUC has a built-in interpolation range of only x2 to x16. The 428’s IP core interpolation filter dramatically extends this rather limited range of interpolation by an additional factor of x2 to x2048, providing an overall range of x2 to x32768.

Pricing and Availability
For pricing and availability, please contact Mario Schiavone at 201-818-5900

About Pentek
Pentek develops, manufactures and markets innovative DSP systems to original equipment manufacturers, distributors and value-added resellers. Pentek offers powerful VME, VXS, PMC, XMC, cPCI and PCI boards for data acquisition, software radio and digital signal processing featuring Texas Instruments C6000 DSPs, Freescale G4 PowerPCs and Xilinx FPGAs. Pentek's I/O includes A/Ds, D/As, FPGAs, digital up/downconverters and more. Pentek equips all products with high-performance I/O including gigabit serial interfaces and offers strong DSP software support.

For the release, photograph and data sheet, please visit:

North American Sales Contact: Mario Schiavone, Pentek, Inc., One Park Way, Upper Saddle River, NJ 07458-2311; Telephone 201-818-5900, ext. 770; Fax 201-818-5904; Email Website

Pentek, Inc.
Mario Schiavone
If you would like to schedule an interview with Rodger Hosking, please contact Patterson & Associates.