28
Questions about Cala Trio? Visit CalaTrio.com/HCPFAQs
LBL-5122 Rev C NOV 2019
RECOMMENDED SEPARATION DISTANCES BETWEEN
PORTABLE AND MOBILE RF COMMUNICATIONS EQUIPMENT AND Cala Trio
Cala Trio is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of
Cala Trio can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and Cala Trio 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 modulation
b)
217 Hz
0.2
0.3
9
745
780
810
800 – 960
GSM 800/900,
TETRA 800,
iDEN 820,
CDMA 850,
LTE Band 5
Pulse modulation
b)
18 Hz
2
0.3
28
870
930
1720
1700 –1990
GSM 1800;
CDMA 1900;
GSM 1900;
DECT;
LTE Band 1, 3,
4, 25; UMTS
Pulse
2
0.3
28
1845
1970
