User's Manual

Page 24 of 29
operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or
relocating REAL System 2.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between
portable and mobile RF communications equipment and REAL System 2
REAL System 2 is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of REAL System 2 can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and REAL System 2 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 2.7 GHz
d = 2.3√P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
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.
Immunity to RF Wireless Communications Equipment
Test
Frequency
(MHz)
Band
a)
(MHz)
Service
a)
Modulation
b)
Maximum
Power
(W)
Distance
(m)
IMMUNITY
TEST LEVEL
(V/m)
385 380 –390 TETRA 400
Pulse
modulation
b)
18 Hz
1.8 0.3 27
450 430 – 470
GMRS 460,
FRS 460
FM
c)
± 5 kHz deviation
1 kHz sine
2 0.3 28
710 704 – 787 LTE Band 13, 17 Pulse 0.2 0.3 9