Product/Service
32-Channel Narrowband Digital Receiver
The Model 6230 is designed for high-speed synchronous data communications for real-time VMEbus systems and is ideal for radar, high-frequency sonar, telecom and software radio applications.
The Model 6230 accepts four analog RF inputs on front-panel SMA connectors. Each input is amplified and then optionally low-pass filtered to avoid aliasing for baseband signals. Each of the four inputs is then digitized by an AD6644 14-bit A/D converter that is currently capable of operating at sample rates up to 65 MHz with future versions up to 80 MHz. The front-end amplifiers accept signals up to 90 MHz to support undersampling when the low-pass filters are bypassed.
The Model 6230 includes eight Graychip GC4016 quad narrowband digital receiver chips. Each device includes four independently tunable receiver channels. Each channel is capable of center frequency tuning from DC to 32 MHz with 0.02 Hz resolution, and output bandwidths ranging from 3.2 kHz to 1.6 MHz. Each digital receiver chip has a crossbar switch which allows all 32 channels on the board to select any of the four A/D inputs for flexible switching.
The front panel clock and sync bus allows one 6230 to act as the master, driving the sample clock out to a front panel flat cable using LVDS differential signaling. Multiple slave 6230s can then be clocked synchronously with the master.
All 32 narrowband receiver outputs are delivered to two Xilinx Virtex-E FPGAs where various modes of data packing, formatting and channel selection are performed. The A/D outputs are also connected directly to the FPGAs so that wideband A/D data can be delivered directly to the DSP board, bypassing the digital receivers. The FPGAs can also be configured by the user to implement custom functions.
Pentek's ReadyFlow Board Support Libraries are available for the Model 6230.
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