HP 3484A Operating And Service Manual page 81

Multifunction unit
Table of Contents

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GUARD
DOWNRANGE
From P12 (50)
I
s,o
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!
1
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1
:
CLOCK CONTROL
To
Print Comman
d and
CLOCK
CONT
ROL
From Pl2
(49)
I
Sample Indicator Circui
t
s
49
UPRANGE
From
P12 (25)
+
20V
+5V
125
.
~+20V
I
32
+5V
I
.
- 20V
- 20V
POWER
I
29
SUPPLY
i'
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~
GROUND
I
CL
K C
ll
h~
1
0
+4
.
5
V
F950
µ
S
e
c
L
+o.
sv
DOWNRANGE
ENABLE
RGI
AUTO
RANGE
COMMAND
C7
.
0
047i
12
UPRAN GE ENABLE
1
0
RI
I
R6
IK
C9
I
Cl4
51
0
pF
CR6
ll Op
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CIO
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CR7
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51
0
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!,
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R2
1
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Rl9
2
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C2
4
ll
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C25
ll
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22
K
RG
3
R3
R3
AUTO
ENABL
E
DELAY ENABLE
+5V
Au
t
o
Ronq
De
lo
NOTE
1
0
R2
·
C
'.:l
OHMS
.. _ ..
_
======~RA~NGE
REGIST1....!E:!R!.========;i
DECODING
= = = = = =
==
REMOTE RA
NG
E SELE
C
T
IO
N
========"'1
i f
i"nstrument hos
OHMS
Option
0
42,
lea
ds
f rom
Ronr;s
swi
t ch
connscf
t
o
r
ow
of
p
in
s
mar
ked
OHMS.
-
-
--
-
I
f
not
,.
leads
are
connec
ted
I
~
t
o
row
of
p ins
near
est
1
NO
C2
7
.
002i
ENABLE
R2
R3
edqe
of
board•
marked
I
OHM
S OHMS
J
AUTO
ENA BLE
NO
OHM
S on
schematic.
,
A
~
1
To
Deloy Gate
I
RANGE
i
52
~
8
'&
®
~>---
,
@
"
8
0 - -
0
3
8
<>----
®
II
~
0 - -
®
1
0
~
0 - -
(J)
9~
@
a
52
+5V
~
®
I
8
@
0
0
0
®
0
®
0
0)
0
®
0
NOTE
I
f
i
n
slrumMI
does not
hove
OHMS
Opti
on 0 42
pos
i
t
ion
©
of
Ro nq
e
s witch is not
us
ed.
3484A
-
J-3034
4
2
1
1
9
1
8
1
7
1
6
L.. -
- -
- -
l
RA
NG
E
l
Knob
for
i
nst
r
umen
t
s
w ith OHM
S
Opt ion
COPYRIG ,HT
1970 BY
HEWLETT
-
PA CKARD COMPAN
Y
IOMn RAN GE
IOOOV (I
OOOKn)I
RAN
GE
IOOV ( IOOKn)
RllNGE
IOV ( IOKn) RA NGE
IOOOMV ( IOOOnl
RAN
GE
IOOMV ( IOOn)
RAN GE
TOP VI
EW
+5V
7
Kno
b f
or inst
rument
s
w
i
th
ou
t
OHMS
O
ption
·
1 0
VIEW,FROM
REAR
OHM
S
~
Ri
RI
R2
RI
~
R2
RI
R3
RI
R3
12
12
OHM
S
a::
u
"'-t-"'-t-"-t-
"'
a::
a::
a::
a::
u
u
u
u
JS
-
1
- - - -
-
1- - - - -
•- - - -
-•- - -
-
I
rr.
~
------ --- --- -
~f=n~h
~ s=:.~o-:-I
C -I3
-
I B
-
12
-
I
A
-
Opt
i
on OOI,
i nser
t
A
4
and A5
be
t
wee
n
J/4
and
J5.
Jt4
--
--
--
-
--
--------
-
-
--
--
-
·I
·
T
7
1 ·I
9
1
REMOT
E
RANGE
PROGRAMM ING
IOO
OKn
IOOV
IOV
IOOOMV
IOO MV
RANGE
(
IOOKnl
( IOKn)
( IOOOn)
(
IOOnl
RA
NGE
RA
NGE
RANGE
RANGE
IO
Mn
ENA
B
LE
IOOO
VllOOOKn
)
ENABLE
IOOV (
IOOK n)
ENABLE
IOV I IO
Knl
ENABL
E
IO
M
E
N
"
'"
IOOO MV
IOO OMV
(
IOOOn)
NOTE
ENABL
E
IOO
M
V (
1
oon I
ENAB
LE
For
a
ll
ENA
B
LE siqnals
LOW
:
Enable
HIGH
::-
No
t
enab
l
e
F
N
F ' °
RANGE R
E LAY
DRIVERS==iJ
D
~
~
F
IOMn
To Annun
ci
at
or
Dri
v
er
00
~
j
,
IOMn
To
J6
( 1)
PR
lr
COMMAr
CRl9
__,
_
___
_
'?c.
0
J~Ys'i
1
~J2~~~iJ~~~Y
E
Ct;.2
3
,
,
IOOV
(
IOOKn)
DR
IV
E
To
Jl(5)
,
J
2 (Bl
,J6(21
,
J7(7)
CR20
IO
V
(
IOKn
) DR
IV
E
__, _____
_
To Jl
(3)
, J2
(
2)
,
J
6( B
l
,
J7
(6)
CR 22
+
20V
I
R38
IO
K
+20
V
IO
OO
M
V (1000
.n)
DRIVE
To Jl(
4
),
J
2(A),J
6
(4
)
,
J
7
(5
)
R39
IOK
c
;::
1
I
1
0
0
M
v (100
1 DRIVE
1
To Jl(D)
,J6
(C), J7
(
4
)
--'
~
F
EXTERNAL
TRI
GGE
R
From P1
2
(
23)

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