July 2002
Intermediate to advanced
344 pages
8h 37m
English
Content preview from Newnes Radio and RF Engineering Pocket Book, 3rd Edition
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the USA only allows the use of 11 channels (channel 1 to 11, with
centre frequencies 2412 MHz to 2462 MHz). In Japan only channel 14
is allowed (no hopping), using a carrier centre frequency of 2477 MHz.
Bluetooth uses 79 hop frequencies, with multiples of a 1 MHz step
size. The lowest carrier frequency is at 2402 MHz (channel 0) and the
highest is 2480 MHz (channel 78). The frequency hopping pattern is
psuedo-random, with 1600 hops per second.
The 5 GHz allocation is actually two sub-bands, one covering 5.15
to 5.35 GHz and the other covering 5.47 GHz to 5.725 GHz. The higher
frequency ISM band allows 1 watt radiated power, rather than the
200 mW limit of the lower frequency band. As with the 2.4 GHz ISM
band, sources in the 5 GHz band must use
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