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Text File  |  1999-10-21  |  378b  |  13 lines
  1. Special crystal filters are needed in conventional receivers to detect spread-spectrum signals 
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  3. Spread-spectrum signals change too rapidly to be detected by conventional receivers
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  5. Spread-spectrum signals appear only as low-level noise in conventional receivers
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  7. A spread-spectrum transmitter avoids channels within the band which are in use by conventional transmitters
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