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We offer help with: Entrepreneurship Management Technology Who we are Paul Schnitzler Biography Résumé Associates	Bell Telephone Laboratories: The SH Ocean Cable 16,000-Channel Repeater uses the latest in semiconductor and circuit technology to create the widest bandwidth, longest life ocean telephone system. This unit fits in a standard undersea repeater body. Need: The next generation undersea trunk telephone system. Problem: The then-current transatlantic cables provided 4,000 two-way FDM telephone circuits; the next system had to provide 16,000 circuits. This would require a base-band system with a 150 MHz bandwidth that would also meet the stringent undersea requirements. Approach: In creating the design, Paul Schnitzler and his colleagues used virtually every advanced analog technology available: feed-forward error correction; 3 GHz, 1.5 W, ultra-linear transistors; computer-tuned L-C matching networks; laser-adjusted ceramic integrated circuit boards; and complementary-B power amplifiers to name some of the advances. Results: The photo shows the actual prototype repeater. It met all of the performance requirements and was completely manufacturable in the company’s plants. Do you need help in communications electronics? Contact us now by Email.
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