SEA 245 - Receiver Block Diagram

5-2
Receiver Block Diagram
SEA 245
Figure 5.2.1
HI-PASS
ANT
TX/RX
PA/FILTER BOARD
LOW PASS
BAND SELECT
ASY-0245-02
LOW PASS
Q2
RF GAIN
CTL
45-75 MHz
1st LO
U1
2nd LO
45.040 MHz
MIX-1
MIX-2
U3
U2FL-1 FL-2
I.F.
U5
45 MHz
40 KHz
U34
A/D
U1
CODEC
U7
DSP
U31 B/C
ASY-0245-01 MAINBOARD
ASY-0245-03
FRONT PANEL/CONTROLLER BOARD
SQL
CPU BOARD
ASY-0245-04
VOLUME
Q6
U14
SPKR
U10