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Directions for Use Chapter 7 Compliance 69
Recommended Separation Distances Between Portable and Mobile RF Communications Equipment and the
Model 4XX Series Monitor
The Model 4XX Series Monitor is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the monitor can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and the monitor as
recommended below, according to the maximum output power of the communications equipment.
Rated Maximum Output Power of
Transmitter (W)
Separation Distance (m) According to Frequency of Transmitter
150 kHz to 80 MHz
d = 1.2
80 MHz to 800 MHz
d = 1.2
800 MHz to 2.5 GHz
d = 2.3
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
11.21.22.3
10 3.8 3.8 7.3
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.
P
P
P