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This document describes the design specifications for the new antenna positioning systems for the Very Large Array 25m antennas. First, I give an overview of the existing system. Then, I include an analysis of the position loop computation scheme and transfer function. Then I provide detailed input and output requirements. Finally, I indicate which areas will be replaced with new electronics and the rough plans to do so.

8/19/2002 - EVLA Memo 45: Antenna Positioning System Specifications (846KB PostScript) - Printer-friendly
specs.pdf (387KB PDF) - Screen-friendly

updated 8/19/2002 - Bob Broilo
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