Maxon SD170EX Series - Page 25

Service Manual SD170EX Series
Page 25 of 38
Data signal flow diagram
Ext. Mod. signal flow in Transmitter
Level
Detector
Analog S/W
MC14053B
Data BPF
Sub-Audio LPF
MF6
Z1
Z
Y1
Y
Adj. Level
MCU
Check Audio In
Tone En
Audio In
Mod Out
Sub-Audio
Encoder
Y0
Z0
X1
X
X0
High : Audio In
Low : No Audio
Data Enable
Data In
Analog S/W
MC14053B
Sub-Audio LPF
MF6
Z1
Z
Y1
Y
MCU
Y0
Z0
X1
X
X0
Pre-Selector
RF Board
Sub-Audio LPF
4th Order
AF
IF IC
SA605DK
RSSI
Comparator
MF6Tone Detector
RSSI
Audio Out
Busy
Ext. Mod. signal flow in Receiver
BPF
30Hz ~ 5KHz
External modulated signal flow diagram
F
F
F
l
l
l
o
o
o
w
w
w
D
D
D
i
i
i
a
a
a
g
g
g
r
r
r
a
a
a
m
m
m
s
s
s