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VS 2001
Technical Handbook
Technical Description
Page 34
Marconi Proprietary information
P/N: 779-0373/02
Revision 02
2.3.2
R/T card
The R/T card interfaces to the Base Band card through the J15 connector and to
the P.A. card through the radio frequency MCX J11, J12 and J13 connectors. The
circuits that make up the R/T card are divided into functional subassemblies
contained in a metallic structure that is divided into sectors.
The R/T card printed circuit has its components distributed on a single side and it
is made up of eight layers.
The printed circuit’s surface is sectioned into seventeen blocks separated by a
gold-plated copper strip discharged by the solder.
The arrangement of the R/T card sectors is shown in Fig. 2.7.
Fig. 2.7:
R/T card: arrangement of the sectors
P.A.
F.E.
+
MIXER RX
J13
PLL 10 MHZ
LF FILTERS
AD7013
AD607
IF STAGE
VCO
100 MHZ
SD2
DUAL PLL
TCXO
SD1
VCO W.B.
470-530 MHZ
SD3
SPLITTER
DRIVERS
LO1RX
MAV-11
TUNABLE
CELLS
TX
MIXER
TX
TUN.
CELLS
TX
SPLITTER
PHASE
SHIFTER
+
SHIFTER
VIB/VIQ
C
O
N
N
E
C
T
O
R
DAC AD1866
FILTRI BF TX
TRASLAT. IOB/QOB
SERVICES
DC/DC CONVERTER
(-5V)
J12
J11
DEMODUL.
I/Q
MODUL.
I/Q
DAC MAX525