Netherlands Institute for Radio Astronomy 1 ASTRON is part of the Netherlands Organisation for Scientific Research (NWO) Board Design Gijs Schoonderbeek Sjouke Zwier

2 Contents  Signal Processing Flow  Starting Points for Board Design  Design Issues  Conclusion

3 Signal Processing Flow Data Path

4 Types of Processing  Input processing  filterbank  digital receiver  Output processing:  beamformer  correlator  pulsar processing  Architecture uses:  independency of subbands  independency of beams

5 Starting Points for Board Design  Standalone and modular board  Standard Interfaces (10GbE)  Direct ADC-interface  1 Second of data storage/buffer (FIFO)

6 UniBoard Top View

7 UniBoard Design (1) 2x 16 bit LVDS 4x 10 Gbps INOUT

8 UniBoard Design (1) 2x 16 bit LVDS 4x 10 Gbps INOUT

9 Layer build up for 10 layer (left), 12 layer (mid) and 14 layer (right) 2.4mm PCB. UniBoard Design (2)

10 Board Layout for SPF+ UniBoard Design (3)

11 UniBoard Design (4)  Power Power Supply Block Diagram

12 UniBoard Design (5) Power eachNumberTotal FPGA (8 FPGA’s)20 W8160 W Interfaces (8 interfaces)2.5 W820 W Memory (4 modules)4 W416 W Power supply20%140 W Total Power236 W Total Power Estimation Summarized

13 UniBoard Design (6)  In and Output Interfaces Block diagram optical interface

14 UniBoard Design (7) UNIBOARD Physical Dimensions size H x D x T 9HE (366.7) x 280 x 2.4mm Board setup 2 x SODIMM_DD3 Back side (8GB) FAN Cooling QDRII+ 2 x 36MBit

15 Challenges  Ramp up to 400 MHz clock speed  More FPGAs (8) on one board  Use of FPGA transceivers  High-speed PCB design  Power consumption  Routing of data packets  On board memory/bandwidth constraints

16 Conclusion  Full 9HE board  Uniboard can be used in both directions  Uniboard standard serial SFP+ 10GbE interfaces on input  DDR3 memory for storage / buffering