ABACO FMC30RF Manuel de l'utilisateur - Page 11
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FMC30RF User Manual
AFE7225
FMC
LPC
CLK_M2C_P/N
6 Controlling the FMC30RF
Good knowledge of the internal structure and communication protocol of relevant on-board
devices is required for controlling the FMC30RF. This document only provides guidelines for
programming the devices. For detailed information it is recommended to refer to the datasheets
listed in the related documents section of this document.
6.1 Guidelines for controlling the RF path
The following control signals controls the RF frontend;
•
TRX_SWITCH_CTRL
•
LNA_BYPASS_CTRL
•
RF_ATT_V[1..5]
Refer to Appendix A for a description of these signals.
The LNA in the RX path depends on the RF coverage specified at the time of order:
-
RF coverage option 1 (400MHz – 1200MHz):
-
RF coverage option 2 (1200MHz – 3000MHz):
The gain is 18-20dB for each LNA stage.
6.2 Guidelines for controlling the CDCE62005
The following control signals connect from the FMC connector to the CDCE62005;
•
SCLK (shared with other devices)
•
SDATA (shared with other devices)
•
CDCE62005_CS#
•
CDCE62005_SDOUT
•
CDCE62005_PD#
•
CDCE62005_SYNC#
UM015
REF
TRF372017
LNA_BYPASS_CTRL
TRF371109
ATT
TRF371125
LO
LNA_OUT
* not avalable from front panel
TRF3765
REF
U2P
U4P
SEC_REF+
CDCE62005
U1P/N
U3P
PRI_REF+
U0P/N
Figure 6: Clock paths
www.abaco.com
TX VCO IN
TX LO OUT
TX_VCO_CTRL
RX VCO IN
RX LO OUT
RX_VCO_CTRL
TCXO
30.72MHz
CDCE65005_REFEN
SKY67101-396LF
SKY67100-396LF
r1.3
TX CLK
RF I/O
RF IN
TRX_SWITCH_CTRL
RX CLK
REF OUT
REF IN
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