To promote understanding and accuracy and to promote ease of use of the regulations, the following definitions shall apply throughout this chapter.
"Antenna height"means the vertical distance between the highest point of the antenna and the ground directly below this point.
"Duty cycle"means the percentage of time that an emission source actually contributes radio frequency energy to the surrounding environment. (A 24-hour continuously broadcasting source has a duty cycle of 100%.)
"Effective radiated power (ERP)"means the power input to the antenna, times the numerical power of gain of the antenna relative to the dipole or isotropic radiator, respectively.
"Emergency services communications"means two-way radio communication, directly associated with the "911" emergency services, including fire, police and emergency medical aid or ambulance service.
"Emission source"means any device, machine or facility producing nonionizing electromagnetic radiation between 100 KHz and 300 GHz in frequency, with an effective radiated power of one watt or greater.
"Hand-held source"means an emission source (transmitter) normally held in the hand of, or on the person of, the person operating such source.
"Hertz (Hz)"means cycles per second. The rate of oscillation of a sine wave from maximum amplitude through minimum amplitude and back to maximum amplitude.
"Intermittent source"means a signal or emission that is not normally present for more than 15 minutes continuous operation, recurring at random times throughout the day.
"Microwatt (µW)"means one millionth (1/1,000,000) of one watt, a measure of electrical power.
"Milliwatt (mW)"means one thousandth (1/1,000) of one watt, a measure of electrical power.
"Mobile source"means transmitters and associated antennas attached to or installed in vehicles which normally move about (automobiles, watercraft, aircraft).
"Mounting bracket"means any device or substance used to affix an antenna to a tower, pole, mast or other structure.
"Point-to-point broadcast"means to send or transmit electromagnetic waves in a specified single direction, limiting the potential for reception (normally) to one receiving antenna.
(Ord. 99 § 3, 1989)