Motorola R-20010 Maintenance Manual page 339

Communications system analyzer
Table of Contents

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71-86
; 7
100Hz
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J
<.
ADDRESS BUS
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BUS
1---___ll_jl_L
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us
91-98
69
70
87
88
89
90
58
6
60
IRQ
U1
~
ADRS
TiOEN
L-,1
DECODE
'
1'----
0
R /W
TIMER
J
NM1
~
~~m
PAO-PA7
DVM
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FREO
PERIOD
--,
CNTR
PIA
_____
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M"---1-
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tl
1
r - - -
INT OVM
TO AID
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A/D
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U28
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3 5
SEL
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EXT DVM TO
AID
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TP1
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U29
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SIGN
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R22
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....__1-__l__"f___--t---~
EXT CTR
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,.-
IF/BFO
FRO
1
US
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U11,
SYNTH 1KHz
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U12.U13
_
U47,
~
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U13
00
100
~~
SYNTH
U49,
REF
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EDGE
10 MHz
DIVIDER
100 KHz
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PERIOD
DETECT
1
MHz
CLOCK
1 - - - - - - - - - - -
1
SELECT
'---::::-::-::;
~~--------~~~
L
FREQ/PERIOD
COUNTER
- - - - - - - - - - - - - -

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