Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 153

Hf receiver
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CIRCUIT DESCRIPTION
r~EMCOO£« ASSEM* -
optical
ENCODE*
1U
GROUP
2
DiSPLAY/lEO
DRIVERS/DECOOt RS
U7.U«.US.UIO.UI2
u
GROUP
DS24
2 LCD'S
0SS9
GROUP 2 OISPLAYS
UEU..KR.A0O
DSI5.I4.IT. IS
WJ-8718-19/FE HF RECEIVER
OPTICAL
ENCODE*
DECOOt
U7iOI.CE
CROUP 2
DISPLAY/SWITCH
INTERFACE
fOf
„-
t-. —i •
microprocessor ''••• •>.'-^.>; .;;'.-
|-v-"j
:-,.-#T
fcs
5
ADORESS/
CONTROL
DECOOt
UIS.UI6.
uio. uio
C
£
H"~
5
DATA
DCCOOE
U20
FOP
T"
TO DECIMAL
POINT LEO.Rf
F*t OOENCY
DISPLAY
0
GROUP
I
DISPLAY/SWITCH
INTERFACE
AU003>»OM
^
A4AI0
. ',
-r.-,J:*
AUDIO AMPS
A7UIA.B
GROUP 2 SWITCHES
S32-S59
GROUP I SWITCHES
SI-S20
r - •
i
I AUOIOSl
HEADPHONCX' « 7^*^ .-•;• .:«='•
JACK
1
rfg voltage from front
panel
j
'
potentiometer
o-nf & VOLTAGE TO A6AZ
SWITCH
Ul*
-4»SVAuO0 I TO METER
GROUP
I
OiSPLAY/LEO
ORIVERS/DECOOERS
UJ.lM.US.U*.UH
CROUP I DISPLAYS
BF0DSI-DS4
RF DST-DSi.
DS60
GROUP I LED"
0SI9-2S
OS61-6S
1:
l- <\
Figure 3-32. Front Panel Switch/Encoder Block Diagram
3-70

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