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Additional and Technical Slides

Additional and Technical Slides. The CASPER BEE2. BF Processing Engine 5 FPGAs (4 used) Embedded PowerPC Four 10 Gbps XAUI links per FPGA. A Single Beam Processor. Synchronous Tiered Processor. Propagate summed and reference beams as well as synch data

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Additional and Technical Slides

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  1. Additional andTechnical Slides

  2. The CASPER BEE2 • BF Processing Engine • 5 FPGAs (4 used) • Embedded PowerPC • Four 10 Gbps XAUI links per FPGA

  3. A Single Beam Processor

  4. Synchronous Tiered Processor • Propagate summed and reference beams as well as synch data • Correlate inputs at each stage for calibration • ATA42 processor has 3 stages (9 FPGAs)

  5. Leaf Node Signal Path • Bulk Delay: 1024-sample buffer memory • Fine Delay: 6-tap Real FIR Filter (12-bit coefficients) • Fringe Rotator: Programmable phase angle and rate

  6. Branch Node Signal Path • Fs/4 Shifter: Moves usable spectrum to sideband • Hilbert Transform: Selects real sideband output

  7. Voyager 1 S/C at 106 AU Distance 7/12/08

  8. On-Axis Null (2D) 20-dB Null

  9. GPS Carrier Leakage10-8 of Transmitted Power Modulation Sidelobes Signal Barely Visible At 1 kHz Resolution

  10. Waterfall PlotGPS CW Tone @ 1 Hz Resolution 2 X98 Seconds 667 Hz

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