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HP 3490A - Page 275

HP 3490A
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TO ROM
INPUTS
(U5)
@UNTER
A
FROM AIUI
V
[?,il9Bäloo'o*
20
TO INGUARD
^^
GPIS ISOLATION
4tJ
[
-!s]!r;.
f
.nn
|
_tgts)
";_|_
r_oro
]
HArR
>,o>'i-
narn
I
iqs)'>J-
Horc
I
rota
>z ;{-
ro't
L_!ela).,
>_l__
xora
iC
HPSB HPSA
.*Jil
e
f
rcrn
)-.1-+5v
I
I
I
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I
ro
f
xooo
I
I
;" \IJLEXE)
ExrERtrlaL
i
,
I
TRIGGER ENABLE
L
," \L(LISH)
INHIBIT
'-
/
SAMPLE/HOLD L
I
)!xooc
AIJS
>-l-
HDoE
g
F-nooa
7
t8
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)_l_r_soo
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;-l--.r.t
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HDCB
HIR8,
H IFA
R8
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HOCA
HIR A
|
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f
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|
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r ^.
|
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|
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szxuooe
18
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lff?"f:i'''
u
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/-1-^l
_...
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xrra
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FR.M
a36
IiE],$nrucc1
üo'J
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lt
L
HoPP
>
r
>--r--eor-
J
+5v
+5v
+5V
+5V
,o
l,
us
,. READ
''
oNLY
MS,|ORY
702
19
Figure
7-37.
Schematic
Diagram,
Inguard
program
and
ROM
Assy's,
A34, A36.
3490/O30-
E-32r7
1-1317-74
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