NASA/CR-208535, Wheeler, M.L., Spread Spectrum Receiver Electromagnetic Interference (EMI) Test Guide, Systems Analysis & Integration Laboratory, Science and Engineering Directorate, Technical Monitor: Ms. Dawn Trout, NASA Marshall Space Flight Center, AL 35812, and Georgia Tech Research Institute, Atlanta, GA 30332, July, 1998, pp. 46, Format(s): PDF 3573k |
The objective of this test guide is to document appropriate unit level test methods and techniques for the performance of EMI testing of Direct Sequence (DS) spread spectrum receivers. Consideration of EMI test methods tailored for spread spectrum receivers utilizing frequency spreading techniques other than direct sequence (such as frequency hopping, frequencing chirping, and various hybrid methods) is beyond the scope of this test guide development program and is not addressed as part of this document. EMI test requirements for NASA programs are primarily developed based on the requirements contained in MIL-STD-461D (or earlier revisions of MIL-STD-461). The corresponding test method guidelines for the MIL-STD-461D tests are provided in MIL-STD-462D.
These test methods are well documented with the exception of the receiver antenna port susceptibility test (intermodulation, cross modulation, and rejection of undesired signals) which must be tailored to the specific type of receiver that is being tested. Thus, test methods addressed in this guide consist only of antenna port tests designed to evaluate receiver susceptibility characteristics.
MIL-STD-462D should be referred for guidance pertaining to test methods for EMI tests other than the antenna port tests. The scope of this test guide includes: (1) a discussion of generic DS receiver performance characteristics; (2) a summary of S-band TDRSS receiver operation; (3) a discussion of DS receiver EMI susceptibility mechanisms and characteristics;(4) a summary of military standard test guidelines; (5) recommended test approach and methods; and (6) general conclusions and recommendations for future studies in the area of spread spectrum receiver testing
These test methods are well documented with the exception of the receiver antenna port susceptibility test (intermodulation, cross modulation, and rejection of undesired signals) which must be tailored to the specific type of receiver that is being tested. Thus, test methods addressed in this guide consist only of antenna port tests designed to evaluate receiver susceptibility characteristics.
MIL-STD-462D should be referred for guidance pertaining to test methods for EMI tests other than the antenna port tests. The scope of this test guide includes: (1) a discussion of generic DS receiver performance characteristics; (2) a summary of S-band TDRSS receiver operation; (3) a discussion of DS receiver EMI susceptibility mechanisms and characteristics;(4) a summary of military standard test guidelines; (5) recommended test approach and methods; and (6) general conclusions and recommendations for future studies in the area of spread spectrum receiver testing
| Keywords: | spread spectrum receiver, electromagnetic interference (emi), test and evaluation |
|---|---|
| Subjects: | Space Communications, Spacecraft Communications,Command And Tracking: Space Communications |
| ID Code: | 403 |
| Deposited On: | 08 July 2002 |