27
Recommended separation distances between portable and mobile RF communications equipment
and the Ameda Mya
The Ameda Mya is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of Ameda Mya can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the Ameda Mya as recommended below, according
to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter [W]
Separation distance according to frequency of transmitter [m]
150kHz to 80MHz
80MHz to 800MHz
800MHz to 2.5GHz
0.01
0.117
0.117
0.233
0.1
0.369
0.369
0.738
1
1.167
1.167
2.333
10
3.689
3.689
7.379
100
11.667
11.667
23.333
For transmitters rated at a maximum output power not listed above, the recommended separation
distanced in meters (m) can be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output power rating of the transmitter in watts (W) according
to the transmitter manufacturer. NOTE 1. At 80MHz and 800MHz, the separation distance for the
higher frequency range applies. NOTE 2. These guidelines may not apply in all situations. Electro-
magnetic propagation is affected by absorption and reflection from structures, objects and people.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cord-
less) telephones and land mobile radios, amateur radio, AM and FM radio broadcast
and TV broadcast cannot be predicted theoretically with accuracy. To assess the elec-
tromagnetic environment due to fixed RF transmitters, an electromagnetic site survey
should be considered. If the measured field strength in the location in which the device is
used exceeds the applicable RF compliance level above, the device should be observed
to verify normal operation. If abnormal performance is observed, additional measures
may be necessary, such as reorienting or relocating the device.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
