EDN

EDN, May 26, 2011

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440-MHz SYNCHRONOUS DDR DATA 440-MHz SYNCHRONOUS DDR DATA 440-MHz SYNCHRONOUS DDR DATA 440-MHz SYNCHRONOUS DDR DATA 440-MHz SYNCHRONOUS DDR DATA 440-MHz SYNCHRONOUS DDR DATA 16 LVDS-TO- SLVS BOARD TERMINATION 16 SLVS- COMPATIBLE LVDS LVDS 16 LVDS-TO- SLVS BOARD TERMINATION 16 SLVS- COMPATIBLE LVDS LVDS BUFFERING AND PACKET CONVERSION ETHERNET MAC XAUI 4×3.125 GPBS 4×3.125 GPBS 16 LVDS-TO- SLVS BOARD TERMINATION 16 SLVS- COMPATIBLE LVDS LVDS BUFFERING AND PACKET CONVERSION ETHERNET MAC XAUI 4×3.125 GPBS 4×3.125 GPBS Figure 4 An FPGA bridges between an SOC with SLVS I/O and a set of XAUI ports. data stream and the XAUI packets. The VDSL2 device transmits three links and receives three links. Each link contains an 18-bit bus, connecting to the stan- dard SLVS ports from Broadcom's DSL (digital-subscriber-line)-termination ICs to the FPGA. The FPGA can steer and multiplex the SLVS buses from any of the three receiver links to any of the three transmitter links, so the EDN 110526DF1 Figure 4 DIANE Broadcom devices all interconnect. At the other side of the FPGA, eight 3.125- Gbps SERDES channels can form two interfaces for Ethernet-switch connec- tions. This configuration constructs a The S-Series Aeroflex introduces the signal generator of the future, and makes compromise a thing of the past. With a legacy of innovation that includes pioneering the use of Fractional-N synthesizers originally developed by Marconi Instruments, Aeroflex sets a new standard for performance, versatility, and ease of use with the SGA analog RF signal generator. Compact and lightweight with an intuitive touch-screen interface, the SGA offers best-in-class precision, productivity, and reliability — all at a surprising mid-range price. • Test both high quality receivers and devices faster. Typical phase noise is -135 dBc/Hz at 20 kHz offset from a 1 GHz carrier. You can easily measure receiver selectivity beyond 80 dB. • Accelerate production throughput. Frequency settling times range from 1 ms to 100 µs — up to 5X faster than comparable signal generators. • Have answers at your fingertips, not buried in menus. The elegant touchscreen interface requires fewer commands, saves time, and prevents errors. www.aeroflex.com 36 EDN | MAY 26, 2011

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