RadioFrame Networks Inc MCRB10 User Manual
MC-Series System Installation & Testing
System Description
20
RadioFrame Networks, Inc.
2.2.5 RF
Shelf
The MC-Series System provides one RF shelf per sector. The RF shelf contains amplifiers, filters,
redundant DC-DC converters, and fans to provide cooling to the power amplifiers (PAs).
redundant DC-DC converters, and fans to provide cooling to the power amplifiers (PAs).
The transmit chain includes a variable attenuator for adjusting the Tx power output at the top of
the cabinet, a multi-channel linear power amplifier (PA), a band pass filter, and a sampling port.
The Tx sampling port provides approximately top of the rack (TOR) minus 20 dB output power.
The Tx power output at the top of the rack can be varied by changing the datafill and adjusting
the Tx attenuator setting on the front of the RF shelf (refer to section 7.10 TOR Tx Measurement
Procedure for more information).
the cabinet, a multi-channel linear power amplifier (PA), a band pass filter, and a sampling port.
The Tx sampling port provides approximately top of the rack (TOR) minus 20 dB output power.
The Tx power output at the top of the rack can be varied by changing the datafill and adjusting
the Tx attenuator setting on the front of the RF shelf (refer to section 7.10 TOR Tx Measurement
Procedure for more information).
The PA is sized to allow sufficient linearity and gain such that a minimum of 10 dBm per carrier
(up to 20 carriers) can be achieved at the top of the rack. The sampling port signal is brought out
to the front of the RF shelf to provide monitoring and testing of the transmit path.
(up to 20 carriers) can be achieved at the top of the rack. The sampling port signal is brought out
to the front of the RF shelf to provide monitoring and testing of the transmit path.
The receive path contains a band pass filter, low noise amplifier (LNA) and a sampling port. As
with the Tx sampling port, the Rx sampling port is brought out to the front panel of the RF shelf.
The Rx sampling port provides approximately top of the rack (TOR) minus 20 dB output power.
with the Tx sampling port, the Rx sampling port is brought out to the front panel of the RF shelf.
The Rx sampling port provides approximately top of the rack (TOR) minus 20 dB output power.
Figure 20
RF Shelf functional diagram
TX BPA
RX BPA
LNA
PA
VAR. ATTEN.
TX Test Port
RX Test Port
To RBS
To Top
Of the
Rack
DC-DC
Converter
DC-DC
Converter
DC-DC
Converter
DC-DC
Converter