Ericsson Radio Systems AB PKRC1311004-1 Manual De Usuario
Radio Configurations, RBS 2206
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Filters, amplifies and distributes received signals to receivers
belonging to one BTS.
belonging to one BTS.
4.5.1
Isolation Values
The RF isolation between the antenna reference points within any
configuration is required to be at least 30 dB. See industry standard /
GSM:05.05/.
configuration is required to be at least 30 dB. See industry standard /
GSM:05.05/.
4.5.2
RX Description
The receiver system performance is configuration dependent.
Third-Order Intermodulation Products
Receiver sensitivity is reduced when a third-order intermodulation
product, generated by the radio transmitters in the RBS, is received at
the same ARFCN as the useful signal. This occurs when the distance in
frequency between two simultaneous transmitters is chosen in such a
way that a third-order intermodulation product is generated at the same
frequency as the operating frequency of one of the receivers in the RBS.
product, generated by the radio transmitters in the RBS, is received at
the same ARFCN as the useful signal. This occurs when the distance in
frequency between two simultaneous transmitters is chosen in such a
way that a third-order intermodulation product is generated at the same
frequency as the operating frequency of one of the receivers in the RBS.
The receiver sensitivity reduction due to third-order intermodulation
products can be avoided with frequency planning.
products can be avoided with frequency planning.
No frequency planning is needed for intermodulation products of higher
than third-order.
than third-order.
4.6
Basic Configurations
The GSM 900 and GSM 1800 configurations meet the GSM
requirements, except where otherwise stated.
requirements, except where otherwise stated.
The capacity of a configuration is defined at the TX and RX antenna
reference points at the RBS border. There is an X close to every
reference point in the figures. The RBS border is not included in the
figures.
reference points at the RBS border. There is an X close to every
reference point in the figures. The RBS border is not included in the
figures.
The equivalent output power with SW power boost (TX diversity)
configured is the original output power specified for the basic
configuration increased with typically 3 dB, if separate TX antennas are
used. The configurations that support SW power boost are listed in
Section 4.7.3 SW Power Boost Configurations with CDU-G on page 73.
configured is the original output power specified for the basic
configuration increased with typically 3 dB, if separate TX antennas are
used. The configurations that support SW power boost are listed in
Section 4.7.3 SW Power Boost Configurations with CDU-G on page 73.
Functional views of radio signal paths for various configurations are
shown in Figure 6 on page 36 upto and including Figure 24 on page 64.
Only components necessary to illustrate the configuration are shown.
shown in Figure 6 on page 36 upto and including Figure 24 on page 64.
Only components necessary to illustrate the configuration are shown.
In some configurations, the radio signal paths can differ depending on
where in the cabinet the basic configuration is used. The figures show
fully-equipped cabinets with two or three BTSs, that is two or three
basic configurations are shown in the same figure. These are different
physical implementations of the same basic configuration, not different
configurations. The second BTS is drawn with dotted lines to show
how an SCC in a fully-equipped cabinet is connected.
where in the cabinet the basic configuration is used. The figures show
fully-equipped cabinets with two or three BTSs, that is two or three
basic configurations are shown in the same figure. These are different
physical implementations of the same basic configuration, not different
configurations. The second BTS is drawn with dotted lines to show
how an SCC in a fully-equipped cabinet is connected.
EN/LZT 720 0008
R1A
2001-06-26
35 (421)
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