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MArN CTRCUTT ASSEMBLy
(O3490-6650t)
TURN
-
ON CLEAR
CIRCUIT
WJ
+5V
FROM
,"\
poweä-su.pplV
< ö-+5V
TO
LOGTC
C|RCUtTS
I N
STRUME NT
TURN
-ON
T URN.
ON
I
TOI
I
AIJT(N)
AIJ5
(F)
l.-i3Bl,"J-r
L__J-
QUALIFIER MULTI
PLEXER
HMOE
HMQC
I
HMQA
(LSCK)
STATE CLOCK
s
FROM
U4
(8)
--:
l-rua
--'t-:
I
xma
--!
FROM
-J
HMC
-
us RoMl
Hr4e
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nne
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LHur
---q'
FROM
I,J6
ENO OF READING
(LEOR)
FROM
UI I MAIN TIME
8IT
B H
(HMTB)
r
IME COUNI
|
(LTCI
)
I
TtME
COUNT 2
(HTCz)
61
rlMEcouNr4(Hrc4)
I
TrME
COUNT
8
(HTC8)
I
rrue
couNr
r6(HTcr6)
I
L TIME
COUNT
32
(HTC32}
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-
HtFE)
-
HIRA)-
H
tR8)
-
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-
il,
[-
MAN
NORM
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(LMNO)
I
SAMPLE RAIE
C
H
{HSSC)
ll
<
saMPLE RATL
BH
(HSsBl
I
R5t
I
SAMPLERATEAH(HSSA)
6.8K
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(LMNc)
HMG FROM
u9
il3)
ROM
-
(LSCK}
STATE CLOCK
_
5
FRoM
ua
(8)
8,rr,re
{
FROM
U2I
R50
6.8 K
FUNCTION A
H
(
FUNCTION
B H
(
l'naHcr
a x
t
1
RANGE
8H
(
LRANGE
C
H
(
l6
auroRANGE
H
(HAUr)
ZERO
DETECT H
(HZDT)
MAIN
TIME
8IT C H
(HMTC)
LMQD
HMOE
HMOO
HMOE
+5V
(HSCK)
STATE
CLOCK
FROM
U4(9)
6
|.4.
+5V
HMOB
HMOC
I
HMoA
l4
exr ENcoDE
L
(LEXE)
ll,l4
xor-oL(LHLo)
NOTES.
I.
IF INSTRUMENT
REFUSES
TO
UPRANGE
OR
DOWNRANGE IN AUTO
MODE. CHECK
FOR
DEF€CTIVE
U2I.
2.
IF
INSTRUMENT
COUNTS
BY EVEN
NUMBE
IN THE TWO
LEAST SIGNIFICANT
DIGITS II
THE
0c OR
OHMS
AUTO MODE,
CtO SHOULT
8E
REMOVEO
OR
REPLACED
WITH
A VALUE
NOT TO
EXCEED
lOOOpF.
L
COPYRIGHT 197? 8Y
HEWLETT.PACKARD
COMPANY
DATA
FLAG H
(HOFL)