UL 150-2004《天线旋转器》

1.1 These requirements cover antenna rotators intended for household and commercial use on supply
circuits in accordance with the National Electrical Code, NFPA 70.
1.2 An antenna rotator generally consists of:
a) A mast-mounted (generally outdoors), motorized drive unit that rotates the antenna to the
desired receiving azimuth,
b) An indoor-located (usually near television- or radio-receiving equipment) user-operated
control unit that delivers operating power and direction signals to the drive unit, and,
c) A length of multiple-conductor Class-2 circuit cable to electrically interconnect the drive unit
and the control unit. Some antenna rotating units may control antenna elevation separately or in addition to azimuth. In some cases, the drive unit may be located indoors.
1.3 The power used to drive the motor of an antenna rotator is derived from a circuit complying with Class 2 limitations in accordance with Article 725 of the National Electrical Code, ANSI/NFPA 70.
1.4 These requirem