Ericsson MINI-LINK BAS - Page 60

MINI-LINK BAS 5-4
Technical Description EN/LZB 111 0542 P2B
CABLE
INTERFACE
TX
Demodulator
TX direct
Modulator
TX MCM
Module
TX Burst
Controller
RX IF2
Converter
RX MCM
Module
DC/DC
Amplitude
controlling
Board
controller
IF2
LO2
(uP)
IF1
LO1
to/from
Modem
Figure 5-2 Radio Board Functional Block Diagram
Scambler
uP
FEC
Enc
D/A
C-QPSK
Endcoder
IF
Modulator
RCL and
Ranging
Handler
De -
Scrambler
FEC
Dec
A/D
C-QPSK
Detector
IF
Demodulator
RAU
Interface
from
MAC
to
MAC
from
backplane
Supervision &
Maintenance
RCC
to/from
RAU
+56V
350 MHz
140 MHz
to/from
MAC
Radio Control loop
to/from MAC
Figure 5-3 Modem Board Functional Block Diagram