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Partner Product

Model 7131  (Pentek Inc)
Model 7131 is a general-purpose 16-channel multiband digital receiver PMC module which attaches directly to PMCcompatible baseboards. It includes both a Virtex-II FPGA and two 14-bit A/Ds for signal processing.

Product Highlights

*Two 80 or 105 MHz, 14-bit A/D converters * 16 channels of multiband digital downconverters *5 kHz to 10 MHz output bandwidth for ƒS = 100 MHz *250 MHz input bandwidth * Ideal for IF sampling *User-configurable Xilinx Virtex-II FPGA *Custom FPGA I/O through the P4 PMC connector *Bypass path allows direct capture of A/D data *Front panel clock and sync bus *Synchronization of up to 80 modules (with Model 9190) *Ruggedized version available: 7131-702

Product Description

Front End

The Model 7131 accepts two analog RF

inputs at +4 dBm full scale into 50 ohms on

front panel SMA connectors.

The two inputs are transformer coupled

and digitized by AD6645 14-bit A/D converters.

The AD6645 operates at a maximum

sampling rate of 80 MHz in the standard unit

and up to 105 MHz for option -100.

The sampling clock can be driven from

an internal 80 MHz or 100 MHz crystal

oscillator, or from an external sample clock

supplied through a front panel SMA connector

or the front panel sync bus.

Digital Downconverters

The 7131 includes four TI/Graychip

GC4016 quad multiband digital downconverter

chips. The maximum input sampling

rate for the GC4016 is 100 MHz. Each

device includes four independently tunable

channels capable of center frequency tuning

from DC to ƒS/2, where ƒS is the sample

clock frequency.

Each GC4016 accepts two 14-bit parallel

inputs from the two A/D converters. A crossbar

switch in each GC4016 allows all 16

channels on the board to select either of the

two A/D inputs for flexible switching.

Output Bandwidth

With a 100 MHz sample clock, the

useable output bandwidth of each of the

downconverter channels is 2.5 MHz. However,

since the Model 7131 delivers parallel

digital outputs from the GC4016 into the

FPGA, users can take advantage of the

GC4016 channel combining mode to join

two or four channels into a single channel

with a resulting bandwidth of 5 or 10 MHz,

respectively. This supports many of the

new wideband wireless standards.

Since both A/D converters connect

directly to the FPGAs, signals with even

wider bandwidths can be accommodated.

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Wind River, a wholly owned subsidiary of Intel Corporation (NASDAQ: INTC), is a world leader in embedded and mobile software. Wind River has been pioneering computing inside embedded devices since 1981 and its technology is found in more than 500 million products