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HP 3490A - Page 215

HP 3490A
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,/o
Al I
MArN
ctRcurT
assEMBLy
(o349o-665ot)
CLOCK
DATA
COUNTER
+5V
o.ol
NOTE
I
4Mi;Q
7
(
LTXF)
TRANSFER
L
FROM
UI8(6)
(HCDC)
CLEAR DATA COUNTER
FROM
U23(8)
?
(LTXF)
TRANSFER
r
FROM
Ut8
(6)
3.333[iz
FoR
/\/
5OHz
OPERATTON
(LCDC)
CLEAR OATA
COUNTER L
FROM
UI6
(4)
7
+5V
FROM
POWER +5V
SUPPLY
NOTES,
t.
rF
IN
LIF
IN
TO
l-r.o*
.
"
n
i!g!"?if'iJj
scaN B H
LscaN
a H
LSHC
FROM
U6(
7
U8
U8
STATE CLOCK
FROM
POWER
SUPPLY
-5v
---dä-!--
-"
IP*33|]3
GRYSTAL
.NO|SY,
MAY
CAIJSE
NOrsE
INSTFUMENT
COUNTS
CONTINIJOUSLY
TEST
'I,
U8
MAY
NOT
8E s,I/ITCHING
LOW
STATE.
-1
8/s
l-
T-.] |
*
ou
lLlov
(HSCX)
STATE
CLOCK
H
TO
U17(3),Ar J3(4),
Ar
J7il3), Ar J80O)
71316t5
(LSCK)
STATE CLOCK
L
a
TO
U7(9), U16il8), U17(il)
r
(
HSHC
)
FROM
U6(l
7
FROM
POWER
SUPP
I
I
I
coLFf üa;ir6?tdiffffi
FicaRDöo-iim-i-
Rtl
tzK
cRr
,
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