Wi-Fi Design Services Inc reasing Wireless Range Identify Your Connector Bridge Bundle Picker Cable Finder Pigtail Picker Connectors For Times Microwave Systems' LMR®-195, LMR®-400 &LMR®-60 0 Cable s WiFi Tech Fundamentals Shopping Our E-Store/FAQs Shipping & Return Policy Why Buy From Us Order Tracking Customer Login Reseller Programs Equipment Leasing Alternate Payment T erms Contact Us FCC Notice Request For Quote En Español Home www.wirelessnetworkpro ducts.co m & www.hdwif i.com> WiFi Tech Fundamentals WIRELESS TECHNICAL FUNDAMENTALS: TOPICS License Free Bands 900 MHz 2.4 GHz 5 GHz RF Fundamentals Full Duplex Half Duplex Definitions Gain and Loss dBm vs. Watts Spread Spectrum Technologies Channels For FHSS Channels For DSSS Sytem DSSS Spectrum - IEEE 802.11b Overlapping Channels 802.1 Protocol Summary Conversions 1 MHz = 1,000,000 Hz 1 GHz = 1,000 MHz 1 GHz = 1,000,000,000 Hz I.E. - 2400 MHz is the same as 2.4 GHz - 5800 MHz is the same as 5800 GHz Hz = Radio Spectrum Bits = data M = 1,000,000 G = 1,000,000,000 There is a total of 83.3 MHz of Spectrum available i n the 2.4 GHz Band LICENSE FREE BANDS ISM ISM: Industrial, Scientific, and Medical UNI-I (or UNII) Unlicensed National Information Infrastructure 902 to 928 MHz 2,400 to 2,483.5 MHz 5,725 to 5,850 MHz 5,150 to 5,250 MHz 5,250 to 5,350 MHz 5,725 to 5,825 MHz 900 MHz Band (902 to 928 MHz) Data Rates are up to 3 Mbps ( Typical 2 Mbps throughput) Non Line of Sight Unaffected by weather Only few Manufacturers for the products – proprietary technology Expensive – Compared to IEEE 802.X technologies 2.4 GHz Band Large bandwidth available (83.5 MHz) High data rates possible (up to 11 Mbps) With the 11g – 54 Mpps is possible Equipment reasonably priced Unaffected by weather Line of Sight required for long range (greater the several hundred yards) Used world-wide Email Address: Your cart is empty. Reseller Login Click Here USA: 888.588.3800 Int'l: 1.631.588.3877 Add'l Contact Inf o *FREE SHIPPING: SHIPPING SPECIAL . . . ALL ORDERS OVER$1,500 RECEIVE FREE FEDEX GROUND SHIPPING TO ANY ADDRESS IN THE USA. Our 16,000 Square Foot Facility We Respect Your Privacy WiFi Tech Fundamentals http://www.wirelessnetworkproduct s.com/wifitechf undamentals.aspx 1 of 6 31/05/2010 10:18
