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portable and mobile RF communications equipment and the GEMS‐H
The GEMS‐H is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the GEMS‐H can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the GEMS‐H as recommended below, according to the maximum
output power of the communications equipment.
Rated a maximum
output power of transmitter [W]
0.01
0.1
1
10
100
For transmitters rated 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 is the 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 refection from structures,
objects and people.
Guidance and manufacturer's declaration ‐ electromagnetic immunity
The GEMS‐H is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. Portable RF
communications equipment should be used no closer than 30 cm (12 inches) to any part of the GEMS‐H. Otherwise, degradation of the
performance of this equipment could result.
Immunity test
Band a
Proximity
fields
380 ‐ 390 MHz
from
RF wireless
430 – 470 MHz
Communications
IEC61000‐4‐3
704 – 787 MHz
800 – 960 MHz
1700 – 1990 MHz
SAIT‐IFU‐GEMS‐H Rev.1.1 (2019‐11)
Recommended separation distance between
Separation distance according to frequency of transmitter [m]
150 kHz to 80 MHz
d=1.2 ��
0.12
0.38
1.2
3.8
12
a
Service
TETRA 400
Pulse modulation
18 Hz
GMRS 460
FM
FRS 460
±5 kHz
deviation
1 kHz sine
LTE Band13, 17
Pulse modulation
217 Hz
GSM800:900
Pulse modulation
TETRA 800
18 Hz
iDEN 820
CDMA 850
LTE Band 5
GSM 1800
Pulse modulation
CDMA 1900
217 Hz
GSM 1900
DECT
IEC 60601‐1‐2:2014
IEC 60601
Modulation
test level
27 V/m
28 V/m
9 V/m
28 V/m
28 V/m
80 kHz to 2.7 GHz
d=2.0 ��
0.20
0.63
2.0
6.3
20
Compliance level
27 V/m
28 V/m
9 V/m
28 V/m
28 V/m
Page 75 of 79
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