Barcode Education




		Radio Frequency
		RF Modems
		Programming
		On-line vs. Off-line

Radio Frequency Data Collection

Narrow Band vs. Spread Spectrum

Two types of RF technology exists today that are common in the Automatic ID industry: Narrow Band and Spread Spectrum. Narrow Band systems have been around for many years. These systems have a range of about a one mile line-of-site radius and can approximately cover an 800,000 square foot warehouse with a single antenna. Narrow band systems do require an FCC site license which guarantees that no system will use the same frequency within the same area. The license will require a 60-90 day approval and is approximately $200.

Spread Spectrum (SS) systems have a less transmission power (approximately 100 mW) and typically cover between a 100 and 500 radius (40000 sq. ft - 750000 sq. ft). Repeaters can be added to extend the range. These systems have a higher tolerance to interference and do not require an FCC license. The frequency band for spread spectrum is 902-928 MHz and 2.4-2.483 GHz. Data rates can be as high as 1.6 Mbps.

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