15510-EN Rev G
Wireless Footswitch and EMC 45
Recommended Separation Distances between Portable and
Mobile RF Communications Equipment and the Wireless Footswitch.
The wireless footswitch is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the wireless footswitch can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the wireless footswitch 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)
150 kHz to 80 MHz
d = 1.2
√
P
80 MHz to 800 MHz
d = 1.2
√
P
800 MHz to 2.5 GHz
d = 2.3
√
P
0.01
0.12
0.12
0.23
0.1
0.37
0.37
0.74
1
1.2
1.2
2.3
10
3.7
3.7
7.4
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d 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 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE 2
: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects, and people.
