Chapter 3
Communication Ports
RUGGEDCOM RX1501
Installation Guide
28 Diversity Requirements
If the application does not meet these requirements, further certification is required.
Section 3.6.2
Diversity Requirements
Diversity, where two antennas exist within the same physical housing, is a method for improving radio signal
strength. When two antennas are present, the following requirements must be met:
• Antenna isolation must be minimum 10 dB to prevent the receive antenna from picking up too much power
from the transmit antenna.
• Performance characteristics of the transmit and receive antennas must be comparable.
• The performance of the receive antenna, as measured by forward link throughput, must be 0 to 3 dB better
than a single antenna.
Section 3.6.3
Supported Frequency Bands
The following frequency bands are supported by the available cellular modem modules.
WARNING!
Electromagnetic radiation hazard – risk of serious injury. Do not exceed the maximum antenna gain.
Aside from causing cellular interference for other devices that use the same band, adverse health
effects for individuals in the area may occur.
Frequency Range
Band
Tx (MHz) VSWR Rx (MHz) VSWR
RX Diversity
Support
Maximum
Allowable
Gain (dBi)
c
Band I
WCDMA 2100
1920-1980 < 2.5:1 2110-2170 < 3.5:1
ü
4
Band II
WCDMA 1900
1850-1910 < 2.5:1 1930-1990 < 2.5:1
ü
4
Band VIII
WCDMA 900
880-915 < 2.5:1 925-960 < 3.5:1
ü
5
Band V
WCDMA 850
824-849 < 2.5:1 869-894 < 3.5:1
ü
5
Band VI
WCDMA 800
830-840 < 2.5:1 875-885 < 3.5:1
ü
5
GSM 850 824-849 < 2.5:1 869-894 < 3.5:1
û
5
EGSM 900 880-915 < 2.5:1 925-960 < 3.5:1
û
5
GSM 1800 1710-1785 < 2.5:1 1805-1880 < 3.5:1
û
4
GSM 1900 1850-1910 < 2.5:1 1930-1990 < 2.5:1
û
4
c
Gain limits are reported on certification grants, for consideration against Radio Frequency (RF) exposure and Effective Radiated Power (ERP)/Effective Isotropic
Radiated Power (EIRP) limits.
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