(Continued from Part 1. This concludes the article.) a Radio Survey Performing a radio survey of the area first is a necessary step before purchasing or fabricating the appropriate antennas. You might find that no directional antennas will be necessary, the cost reduced, and the remaining budget used to purchase additional sensors. The range of any transmitter is in the end limited by or enhanced by the surrounding terrain. Given that very low power transmitters are being used, the 1 watt transmitted by these sensors, versus the 5 watts of a handheld transceiver, the challenge is greater. Having favorable terrain …
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