Download e-book for kindle: Antenna arraying techiques in the deep space network by David H. Rogstad, Alexander Mileant, Timothy T. Pham

Networking

By David H. Rogstad, Alexander Mileant, Timothy T. Pham

ISBN-10: 0471467995

ISBN-13: 9780471467991

An advent to antenna Arraying within the Deep house community Antenna arraying is the combining of the output from numerous antennas as a way to enhance the signal-to-noise ratio (SNR) of the got sign. Now applied on the Goldstone advanced and different Deep area community (DSN) abroad amenities, antenna arraying offers versatile use of a number of antennas to extend information premiums and has enabled NASA's DSN to increase the missions of a few spacecraft past their deliberate lifetimes. Antenna Arraying concepts within the Deep area community introduces the improvement and use of antenna arraying because it is carried out within the DSN. Drawing at the paintings of scientists at JPL, this well timed quantity summarizes the advance of antenna arraying and its old historical past; describes key techniques and strategies; analyzes and compares a number of tools of arraying; discusses a number of correlation thoughts used for acquiring the mixed weights; provides the result of a number of arraying experiments; and indicates instructions for destiny paintings. a big contribution to the clinical literature, Antenna Arraying concepts within the Deep area community * was once commissioned via the JPL Deep area Communications and Navigation structures (DESCANSO) heart of Excellence * Highlights many NASA-funded technical contributions concerning deep area communications structures * is part of the distinguished JPL Deep house Communications and Navigation sequence The Deep area Communications and Navigation sequence is authored by way of scientists and engineers with large event in astronautics, communications, and similar fields. It lays the basis for innovation within the components of deep area navigation and communications by means of disseminating state of the art wisdom in key applied sciences.

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C. On the message notification page, the rings-to-wait parameter is set to less than three. D. The wait-to-ring parameter is incorrectly set to less than tree on the subscriber notification page. Answer: C Explanation: NOT D - no subscriber notification page in unity. NOT A - no ring notification page in unity. NOT B - no wait-to-ring parameter Subscriber Hears a Reorder Tone When Answering a Call from Cisco Unity A possible cause for this problem is that the Rings to Wait For settings are incorrect.

Verify that the Cisco CallManager has been configured with the correct number of voice mail ports; the number of voice mail ports must match the Cisco Unity configuration. B. Verify in the Cisco CallManager that the hunt group is hunting to Cisco Unity ports that can accept calls. C. Verify the Cisco CallManager has been configured with the correct MWI ports; the number of MWI ports must match the Cisco Unity configuration. D. Verify the call transfer call handlers are configured correctly. E. Verify there are no TSP warning in the Event Viewer.

Answer: C QUESTION 57: Which two tasks must be performed to restore the Cisco Unity server data if it is corrupted or lost? ) A. Verify Microsoft IIS permissions. B. Create a new batch file to replace components in the Registry. C. Verify that no errors in other Cisco Unity processes. D. Reload the Cisco Unity server application on a new server prior to restoring data files. E. Start Dr. Watson manually to resolve issues in Microsoft message exchange server. com - The Power of Knowing 642-425 Answer: A,B QUESTION 58: You are a network engineer at Certkiller .

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Antenna arraying techiques in the deep space network by David H. Rogstad, Alexander Mileant, Timothy T. Pham


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