20
For assistance, call 1-800-635-6156 in the U.S. and 1-800-387-1215 in Canada.
Radio Specifications
The AutoAlert Help Button has a radiofrequency transmitter with the following characteristics:
maximum power over an antenna load: 12 dBm, frequency: 312 MHz ±75KHz, modulation:
OOK. It fully complies with FCC Part 15, Section 15.231 for periodic operation above 70 MHz.
Electromagnetic Immunity
The AutoAlert Help Button is intended for use in an electromagnetic environment in which
RF disturbances are controlled. The user of the AutoAlert Help Button can help prevent
electromagnetic interference by maintaining a minimum distance between portable and RF
communications equipment (transmitters) and the AutoAlert Help Button, as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum output
power of the transmitter
Separation distance according to frequency of the
transmitter
150KHz to 80
MHz
80 MHz to 800
MHz
800 MHz to 2.5
GHz
0.01 W
4.6” (12 cm)
4.6” (12 cm)
9.2” (23 cm)
0.1 W
14.5” (37 cm)
14.5” (37 cm)
20” (74 cm)
1 W
3ft 10” (1.17 m)
3ft 10” (1.17 m)
7ft 8” (2.33 m)
10 W
12ft 1” (3.7 m)
12ft 1” (3.7 m)
24ft 2” (7.4 m)
100 W
38ft 4” (12 m)
38ft 4” (12 m)
76ft 8” (23.3 m)
