Technical description
32
The radiated power, frequency, the kind of modulation and the modulation signal itself are
relevant for the emission behavior of the transmitter. The list below contains exemplary
transmitter and their determined protective distances, which are essentially smaller in parts
than listed above.
Due to reflections and emissions in the Near-Field of the transmitter it cannot be excluded,
that higher field strength can be caused in larger distances, which can lead to interferences.
Following the noted distances the SISS BABYCONTROL monitors should be observed from
the beginning to check the regular function. In case of doubt the regulation above about the
protective distance has to be kept.
examples:
device
Radio characteristics
no interference above a
distance of
Mobile phone
800/900/1800 MHz, 1-2W,
GMSK
1.0m
Wireless telephone, DECT
1880-1930 MHz, 250mW,
GPSK
0.7m
Wireless telephone, CTx
860-930 MHz, 10mW, AM,
GPSK
0.5m
CB Mobile transmitter device
AM *)
26/27 MHz, 1W, AM
2.5m
CB Mobile transmitter device
FM *)
26/27 MHz, 4W, FM
1.0m
PMR-handheld transmitter
device
446 MHz, 0.5W, FM/PM
0.5m
Babycontroll
27 MHz, 0.1W, FM
0.5m
Remote control for toys a.o.
40 MHz, 100mW, AM PWM
35 MHz, 100mW, FM PPM
0.5m
*) with 60 cm antenna
