Phase III - Primary a. Phase control steady state accuracy with two axis implementation, with converters, a high power environment and long range. b. System transient responses with two axis implementation, with converters and at long range. c. Radio frequency interference outputs of a large transmitting array and a large rectenna installation. 13. 3 IMPLEMENTATION - GROUND TEST 13.3.1 SUMMARY The site examined in some detail for the ground test was the JPL Venus Station where an RXCV (rectenna) demonstration and test facility has been installed. This has potential advantages in making possible the use of existing facilities, such as the Venus tracking antenna pedestal, collimation facility, power source and data instrumentation. However, as will be seen, the lines of sight to potential receiving antenna locations at larger ranges have lower elevation angles than would be desired. There also may be objections to creating a potential RFI problem for the other facilities at Goldstone or to sharing the Venus station with its deep space tracking mission; so this site should be treated as an example only. A more extensive site survey than possible in this study should be taken in the future. In addition, the amplitron is taken as the dc-rf converter for the purpose of illustration. The objective could be met for the klystron as well, and in fact one version uses low power klystrons as driver stages for the amplitron. The functional block diagram for the test is shown in Figure 13-1. The mechanical steering function is shown as well as the basic electronic beam control for the transmitter array. Mechanical steering is a desirable feature to demonstrate the control algorithms that must meld mechanical and electronic steering in an operational system. It could be eliminated, saving cost, if an existing antenna mount were used.
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