User's Manual

Optional BTS Equipment Identification
68P64115A19–4
Mar 2003
1X SC 4812T-MC BTS Hardware Installation - Software Release R2.16.1.x
CONTROLLED INTRODUCTION
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RFDS
The CDMA RFDS equipment operates in the CDMA radio frequency
spectrum. Refer to Table 4-1 for the CDMA frequency spectrums.
Table 4-1: CDMA Frequency Spectrum in MHz
Direction 800 MHz Band
Receive 824 – 849
Transmit 869 – 894
RF Interfaces
RFDS interfacing is through directional couplers. The CDMA RFDS
equipment connects to coupled ports of directional couplers, cabled into
the Base Transceiver Station (BTS) site RX and TX antenna paths. The
coupled port connections provide the RF signal interface between the RF
diagnostic function and the following:
S Site RX antennas and the site receiver equipment
S Site TX antennas and the site transmitter equipment
RFDS Function
The CDMA RFDS equipment, operating under software control, is used
to test and verify operation of:
S Site RX and TX antenna path equipment including the antenna, filter,
antenna path equipment in the BTS, any RF cabling, etc.
S BTS broadband transceivers (BBXs)
S TX Power amplifiers
S Call paths, including:
– uplink over the RX antenna path through the BTS
– downlink over the TX antenna path through the BTS
CDMA RFDS tests can be operated automatically at scheduled times to
run a battery of tests, or manually, performing one test at a time.
Complete testing covers each antenna path and its associated
transceivers.
CDMA RFDS testing is controlled from either the Local Maintenance
Facility (LMF) computer, or the control entity Operations &
Maintenance Center-Radio (OMC-R) for CDMA which evokes the test
and displays the results.
The CDMA RFDS equipment essentially monitors a TX antenna path
for TX RF signals and generates RX RF signals into an RX antenna
path.
For testing accuracy and repeatability, all RF monitoring and signal
generation is via conductive paths and not radiated through the air.
Therefore, if the site is equipped with an RF Diagnostic Sub-system,
each RX and TX antenna path is configured with a directional coupler
which is the RF signal interface between the RFDS and the antenna path.
The RFDS (see Figure 4-3) is rack mounted next to the 1X SC 4812T
BTS. For detailed information on installation and operation please order
the RFDS Users Guide (Motorola part no. 68P64113A37).
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