Appendix B (Petition for Rule Making)

5915-EX-PL-1997 Text Documents

MEDTRONIC, INC.

1999-10-15ELS_20757

Appendix B Representative Noise Measurements Medtronic has commissioned noise measurements in thirteen sites around the world where MICS equipment is likely to be used. The representative data depicted on the following spectrum graphs support the conclusion that MICS systems should be frequency agile and have three MHz of spectrum within which to seek a usable (i.e. relatively low noise) channel.

60 — r , —.— .7° hi < Recelved power at antenna port (dBm) —80 — — —100 ul A m j\ || «<—RX Noise Filoor V \J OA w .‘10 e — .120 1_ i 1 1. 1 398 400 402 408 400 408 410 Frequency (MHzp * Herz— und Dinbeteszertrum Nordrhein—\Nestfailen in Bad Germany (smmail town 2 hours drive from DAsseidodf} Fig. 1

‘60 ¥ T= ¥ T + +370 4 € a 3 # : —80 L _ @ § C ® 90 }— — & 3 4 C —100 k a <«—RX Noise Floor $ 2 ~\T $ @ L“\/\/U‘J o 110 F ~ .1 ° A 1 1 1 1 23“ 400@ 402 404 ._ 406 408 410 Frequency (MHay Harefieid Heart Hospital Harefield, England Fig. 2

—80 «+70 Recelved power at antenna port (dBm) 80 F —90 |— 100 Al [\_/fi [\ [] "| «—RX Noise Fioor AUWTVCA Lh tw ~110 7 lism 00 102 pry ade 6e «10 Frequency (MHz) University of Leuven Hospital Louven, Beigium Fig. 3


Document Created: 2001-08-14 19:20:41
Document Modified: 2001-08-14 19:20:41
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