WI.232FHSS-25-R datasheet(34/67 Pages) RADIOMETRIX

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WI.232FHSS-25-R/ WI.232FHSS-250-R DATASHEET

Revision 1.1.0

To calculate the link budget for a wireless link, simply add the transmit power, the antenna gains, and the

receiver sensitivity:

Grxa

SENSrx

Gtxa

Ptx

−

For example, the link budget for a pair of Wi.232FHSS modules at the minimum data rate and using 2.2dBi

½ wave dipole antennas would be:

(25mW): +13dBm + 2.2dB – (-105dBm) + 2.2dB: 122.4dB

(250mW): +23.5dBm + 2.2dB – (-105dBm) + 2.2dB: 132.9dB

A link budget of 122.4 dB should easily yield a range of 1/2 mile or more outdoors. If the environment is

open and the antennas are 8 to 10 feet off of the ground, the range could be more than a mile. Indoors,

this link budget should yield a range of several hundred feet. Packet testing of the 250mW module at full

power has yielded results in excess of 3 miles at maximum data rate.

The balance of receive sensitivity and transmit power allows good performance indoors in the presence of

multi-path while keeping the overall operating current low This makes these modules suitable for primary

battery powered applications such as RFID and automated meter reading.

WI.232FHSS-25-R 数据表(PDF) 34 Page - Radiometrix Ltd