Wideband Amplifier; Rf Input Module - Motorola R-20010 Maintenance Manual

J1
, ANTENNA OUT /IN
, J_
-
' +
OSBSC/GEN
MON
P4
,
SYNTH
'
RF
/
PI
08
RELAY
DRIVER
CRI, 2, 3
VCA
P5
'
WB
AMP HI/LO
AM M
P7
,
~
~
+
DC REF (0)
VREF
'
/
PIO
U9
VCA
SELECT
t
U9, U6
ALC
REF
SEL
Kl
b
1
I
I
I
________
,
I
I
I
I
~,07
I
l
- v
L
CR10
DETECT
~
M
~
~
- v
DSBSC MOO
U10
R I
L
L 18, C51
10.7 MHz
NOTCH
1--
FILTER
R60-R62
3 DB
ATIENUATOR
~
v
ISO
NET
f - -
10.7 MH;
20 MHz
H
LP
FILTER
R63
680~
LO
O FFSET'-
7
CARRIER
+
MOD LVL ,
7
.01 ·1 AGC ,
7
36!
P11
P12
P8
P6
13().85
RF INPUT MODULE
WIDEBAND AMPLIFIER BOARD (A17A2)
(RTL-4 156A)
Figure 17-7. Block Diagram
17-17