Datron TW7000MS, Technical Manual

Page: 37 / 100

3: Theory of Operation
TW7000MS 3-3
Figure 3-1. System Diagram
( 0
0
1
-01
02
2)
HS O
p
ti
o
n
An
ten
na
VS
WR
RF Filter
Powe
r
Amp
lif
ie
r
Referen
ce/
Control
75 MHz IF
Synthesizer
0
0
1
-0020
1
001-00320
001-00310
001
-00710
00
1-
0
0
20
6
001-00901
001-00800
+12V P
A
5 MHz IF
Audio
Sq
uelch
Proce
ss
or
Power
Su
ppl
y
LCD
Dr
iv
er
s
FP
Pr
o
c
essor
Disp
lay
Control Signals
Front Pan
el
Switc
h
Assembly
Keypa
d
Assembly
Keypad
Microphone
Fro
n
t Panel
C
ontrols
Speaker
00
1
-01
1
0
0
+12V ACC
+12V
+5V
+12V
UN
REG
0
0
1
-0041
0
12 Vdc Input
001-00121
001-00143
001-01200
001-0
0
6
0
0
001-00130