SEA 245 - Transmitter Block Diagram

5-6
Transmitter Block Diagram
Figure 5.3.1
SEA 245
I
MIC
U10/DC
CONTROLLER
ASY-0245-03
U31A
DSP
U1
CODEC
U7
45-75 MHz
1st LO
Q
MAINBOARD ASY-0245-01
PA/FILTER
Q1
Q2 Q3
45.016 MHz
90°
2nd LO
Q6 Q7
LOW
PASS
Q3
45MHz
FL1
Q5 Q4
MIX-1
TX/RX
PA/FILTER
ASY-0245-02
BAND SELECT
ANT