Table of Contents
Advertisement
FM radio broadcast and TV broadcast cannot be predicted theoretically with
accuracy. To assess the electromagnetic environment due to fixed RF transmitters,
an electromagnetic site survey should be considered. If the measured field
strength in the location in which the LLVS is used exceeds the applicable
RF compliance level above, the LLVS should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the LLVS.
b Over the frequency range 150 kHz to 80 MHz, field strengths should
be less than [V1] V/m.
Recommended separation distances between portable and
mobile RF communications equipment and the LLVS
The LLVS is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the
LLVS can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications
equipment (transmitters) and the LLVS as recommended below, according
to the maximum output power of the communications equipment.
Rated maximum
output power
of transmitter
0.01
0.1
1
10
100
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.
Separation distance according
to frequency of transmitter (m)
150 kHz to 80 MHz
d
P
=
1, 2
0,12
0,38
1,2
3,8
12
35
Technical Information
80 MHz to 800 MHz
d
=
1, 2
0,12
0,38
1,2
3,8
12
P
Advertisement
Table of Contents
