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Figure 29. Evaluation Circuit Board and Component Layout
AFT Mode Switch
SW2
Video Mode
4 3 2 1
Switch
TP1
G1
Video IF
AGC Filter
C10
C9
PLL Filter
G2
(Main VCO Loop)
Pin 19
MC33171
RV2
U2
RF AGC
Delay
G3
W11
W12
R18
AFT
RV3
Gain
J15
W10
W9
Lock Detector/Filter
(Acquisition Circuit)
MC44302A
3.60"
(Bottom View)
IF Input
Audio Input
SMB3
G12
SW1
J4
Q1
2 1
J11
G10
G12
C5
R33
C7
TP3
J6
C8
+
J8
+
J5
J3
MC44302A
J20
U1
J16
J17
J18
J19
C19
C23
C20
W1
W2
+
C24
C13
+
L4
C14
+
R23
C22
J22 J23
R25
G4
Sound Input (AM)
Pin 23
Pin 18
(Top View)
Video Output
G8
SMB2
R6
W7
W8
Audio–Video Switch
Volume Control
RV1
Sound Intercarrier Output,
G7
Sound Input (FM)
(AC Couple)
C1
Audio Input/
Audio–Video Switch
Pin 3
Sound Demodulator Input,
AM/FM Select
C26
C27
R30
Audio Output
R29
(Variable)
J21
G6
J27
V
CC
G11
W3
W4
V Input (12 V)
S
Gnd
J24
J26
R26
G5
Audio Output
R32
(Constant)
W5
W6
R27
MOTOROLA ANALOG IC DEVICE DATA
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