ABACO FMC30RF User Manual - Page 10
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FMC30RF User Manual
5 Modes of operation
The FMC30RF support different modes of operation; TDD and FDD.
AFE7225
FMC
LPC
5.1 Time-Division Duplex (TDD)
The FMC30RF supports TDD using the RF I/O connector. The RF I/O connector is either
receiving
(TRX_SWITCH_CTRL=0)
TRX_SWITCH_CTRL signal should be driven by the FPGA trough the FMC connector.
5.2
Frequency-Division Duplex
The FMC30RF supports FDD using the RF I/O connector for transmitting and the RF IN
connector for receiving. The TRX_SWITCH_CTRL signal should be driven high by the FPGA
trough the FMC connector.
5.3 Multiple-Input Multiple-Output (MIMO)
With two FMC30RF boards a 2x2 MIMO setup can be realised.
UM015
REF
TRF372017
LNA_BYPASS_CTRL
TRF371109
ATT
TRF371125
LO
LNA_OUT
* not avalable from front panel
TRF3765
REF
TCXO
30.72MHz
SEC_REF
PRI_REF
CDCE62005
Figure 5: Signal Path
or
transmitting
(FDD)
www.abaco.com
TX VCO IN
TX LO OUT
TX_VCO_CTRL
TRX_SWITCH_CTRL
RX VCO IN
RX LO OUT
RX_VCO_CTRL
CDCE65005_REFEN
(TRX_SWITCH_CTRL=1).
r1.3
TX CLK
RF I/O
RF IN
RX CLK
REF OUT
REF IN
The
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