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HP
Measuring Instruments
435B
HP 435B Service Manual
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Se
rvi
ce
M
o
d
e
l
435
Β
S
ERV
IC
E
S
HEE
T
1
vidin
g
an
e
x
ce
p
t
i
o
n
a
lly
sta
bl
e
o
u
t
pu
t
l
e
v
e
l
.
Th
e
ca
libr
ate
d
o
u
t
pu
t
i
s
1
m
W
±0
.70%
ο
at
50
±5
MHz
.
PR
I
N
CI
PLE
S
O
F
O
PER
ATIO
N
General
P
ower
Su
pp
ly
Th
e
P
o
w
e
r
M
ete
r
a
nd
α
co
mp
at
ibl
e
po
w
e
r
se
n
so
r
Th
e
P
o
w
e
r
S
upply
i
s
α
24
V
se
r
ies
reg
ul
ato
r
w
i
t
h
α
a
r
e
u
se
d
to
meas
ure
RF
p
o
w
e
r
l
e
v
e
l
s
.
F
o
r
e
x
a
mpl
e,
s
hun
t
reg
ul
ato
r
co
upl
e
d
ac
r
oss
t
h
e
o
u
t
pu
t
.
Th
e
t
h
e
powe
r
r
a
n
ge
of
t
h
e
HP
M
o
d
e
l
8481
Α
i
s
fr
o
m
-35
s
hun
t
reg
ul
ato
r
pl
aces
gro
und
p
ote
n
t
i
a
l
mid
wa
y
to
+20
dBm
(
-
--0
.3
ιι
W
to
100
m
W
)
in
to
5051
;
t
h
e
betwee
n
t
h
e
24
V
p
ote
n
t
i
a
l
diff
e
r
e
n
ce
t
hu
s
pr
ovid
fr
e
qu
e
n
c
y
r
a
n
ge
i
s
fro
m
10
MHz
to
18
G
Hz
.
in
g
s
upply
o
u
t
pu
ts
o
f
+12
a
nd
-12
Vd
c
.
Th
e
battery
c
h
ar
g
in
g
a
nd
test
c
ir
c
ui
ts
a
r
e
a
u
to
m
at
i
ca
lly
o
p
e
r-
P
ower
Sensor
at
iv
e
w
i
t
h
t
h
e
batte
ry
in
sta
ll
e
d
.
Th
e
po
w
e
r
se
n
s
in
g
de
vi
ce
di
ss
ip
ates
t
h
e
inpu
t
RF
e
n
e
r
g
y
in
to
50
o
hm
s
a
nd
pr
o
du
ces
α
do
v
o
l
tage
T
R
O
UBLE
S
H
OOTI
N
G
pr
o
p
o
r
t
i
o
n
a
l
to
t
h
e
po
w
e
r
l
e
v
e
l
.
Thi
s
do
v
o
l
tage
i
s
sa
mpl
e
d
c
reat
in
g
an
ac
s
i
g
na
l
w
hi
c
h
i
s
coupl
e
d
to
General
t
h
e
I
n
pu
t
Amplifi
e
r
f
o
r
a
mplifi
cat
i
o
n
.
Be
f
o
r
e
beg
innin
g
to
t
r
o
ubles
h
oot
t
h
e
P
owe
r
M
ete
r
,
re
m
o
v
e
t
h
e
co
v
e
r
fro
m
t
h
e
ri
g
h
t
s
id
e
of
t
h
e
in
st
ru
AC
Amplifiers/Range
Switch
me
n
t
a
nd
m
eas
ure
t
h
e
powe
r
s
upply
v
o
l
tages
at
ΤΡ
9
a
nd
I
.F
.M
.
Th
e
ac
s
i
g
n
a
l
i
s
a
mplifi
e
d
by
t
h
e
powe
r
se
n
so
r
's
Inpu
t
Amplifi
e
r
a
nd
t
h
e
P
o
w
e
r
M
ete
r
's
Fir
st,
Seco
nd
a
nd
Third
Amplifi
e
r
s
.
Th
e
RAN
G
E
s
wi
tc
h
atte
nu
ato
r
s,
whi
c
h
a
r
e
pl
ace
d
b
et
w
ee
n
t
h
e
Fir
st
a
nd
Seco
nd
a
nd
Seco
nd
a
nd
Third
a
mplifi
e
r
s,
a
r
e
u
se
d
to
set
t
h
e
r
a
n
ge-to-
r
a
n
ge
ga
in
o
f
t
h
e
P
owe
r
M
ete
r
a
mplifi
e
r
s
.
DC
Circuits
Th
e
S
yn
c
hr
o
n
o
u
s
D
etecto
r
co
nv
e
r
ts
t
h
e
ac
s
i
g
na
l
b
ac
k
to
dc
.
Th
e
o
u
t
pu
t
i
s
coupl
e
d
to
t
h
e
D
C
Ampli-
fi
e
r
vi
a
α
L
o
w
P
ass
Fil
te
r
n
et
w
o
rk
.
Th
e
D
C
Ampli-
fi
e
r
driv
es
t
h
e
mete
r
,
t
h
e
Se
rv
o
Amplifi
e
r
a
nd
p
os-
s
ibly
an
e
x
te
rn
a
l
d
e
vi
ce
t
hr
o
u
g
h
t
h
e
RE
CO
RDER
O
UTPUT
jac
k
.
Servo
Amplif
i
er/Auto
Zero
α
.
PO
WER
ME
T
ER
A
N
D
S
EN
SO
R
.
Set
t
h
e
Th
e
Se
rv
o
Ampli
fie
r
amplifies
t
h
e
D
C
Amplif
ie
r
P
o
w
e
r
M
ete
r
's
RAN
G
E
sw
i
tc
h
to
t
h
e
1
m
W
p
os
i
-
o
u
t
pu
t
.
Wh
e
n
t
h
e
fro
n
t
pa
n
e
l
ZER
O
sw
i
tc
h
i
s
t
i
o
n
,
C
AL
FA
C
T
O
R
s
wi
tc
h
to
100%
ο
a
nd
t
h
e
r
ea
r
pr
esse
d
,
t
h
e
Se
rv
o
Amplifi
e
r
o
u
t
pu
t
i
s
co
nn
ecte
d
to
pa
n
e
l
P
O
WER
REF
s
wi
tc
h
to
(ON)
.
Co
nn
ect
t
h
e
t
h
e
Au
to
Ze
r
o
c
ir
c
ui
ts
co
mpl
et
in
g
t
h
e
a
u
to
m
at
i
c
po
w
e
r
se
n
so
r
to
t
h
e
P
owe
r
M
ete
r
's
P
O
WER
REF
z
e
ro
in
g
f
ee
db
ac
k
l
oo
p
.
Th
e
Au
to
Ze
r
o
do
o
u
t
pu
t
O
U
T
PUT
j
ac
k
.
v
o
l
tage
(e
rr
o
r
s
i
g
na
l
)
i
s
a
dd
e
d
to
t
h
e
a
mbi
e
n
t
te
mp
e
r
at
ure
o
u
t
pu
t
of
t
h
e
powe
r
se
n
so
r
's
po
w
e
r
b
.
POWER
ME
T
ER
A
N
D
HP
M
OD
EL
11683
Α
se
n
s
in
g
de
vi
ce
.
Th
e
po
l
a
ri
t
y
o
f
t
h
e
e
rr
o
r
s
i
g
n
a
l
R
A
N
G
E
CA
L
I
BR
ATO
R
.
Set
t
h
e
P
owe
r
M
ete
r
's
a
nd
t
h
e
f
ee
dbac
k
loop
ga
in
f
o
r
ce
t
h
e
D
C
Amplifi
e
r
RAN
G
E
s
wi
tc
h
to
t
h
e
1
m
W
pos
i
t
i
o
n
a
nd
C
AL
o
u
t
pu
t
to
g
r
o
und
p
ote
n
t
i
a
l
a
f
te
r
fiv
e
seco
nd
s
.
FA
C
T
O
R
s
wi
tc
h
to
100%
.
Set
t
h
e
R
a
n
ge
Ca
li
-
Wh
e
n
t
h
e
ZER
O
sw
i
tc
h
i
s
r
e
l
ease
d
,
t
h
e
Au
to
Ze
r
o
br
ato
r
's
RAN
G
E
s
wi
tc
h
to
1
m
W,
P
O
LARITY
c
ir
c
ui
ts
h
o
ld
t
h
e
e
rr
o
r
s
i
g
n
a
l
co
n
sta
n
t
.
s
wi
tc
h
to
N
O
RMAL
a
nd
FUN
C
TI
O
N
s
wi
tc
h
to
S
TANDBY
.
Co
nn
ect
t
h
e
R
a
n
ge
Ca
libr
ato
r
to
t
h
e
P
ower
Reference
Assembly
P
o
w
e
r
M
ete
r
wi
t
h
t
h
e
powe
r
se
n
sor
ca
bl
e
.
Set
t
h
e
Th
e
Α
3
P
o
w
e
r
R
e
f
e
re
n
ce
A
sse
mbly
co
n
tain
s
α
50
R
an
ge
Ca
libr
ate
FUN
C
TI
O
N
s
wi
tc
h
to
MHz
osc
ill
ato
r
wi
t
h
an
AL
C
loop
ca
p
a
bl
e
o
f
pr
o-
C
ALIBRATE
.
8-8
W
h
e
n
α
ma
lfun
ct
i
o
nin
g
co
mp
o
n
e
n
t
i
s
i
so
l
ate
d
to
an
asse
mbly
o
r
stage,
re
f
e
r
to
t
h
e
a
ppr
o
pri
ate
Se
r
-
vi
ce
Sh
eet
f
or
co
mp
o
n
e
n
t
l
e
v
e
l
t
roubl
es
h
oot
in
g
.
Bloc
k
Diagram
Troubles
h
ooting
Conditions
Th
e
wa
v
e
f
o
rm
s
a
nd
v
o
l
tages
s
h
ow
n
a
r
e
no
rm
a
l
w
h
e
n
o
p
e
r
at
in
g
und
e
r
t
h
e
f
o
ll
o
win
g
co
ndi
t
i
o
n
s
.
ΝΟΤΕ
To
ex
hi
b
i
t
t
h
e
co
rr
ect
wa
v
efo
rm
s
in
t
h
e
R
ANG
E
p
os
i
t
i
o
n
s
s
h
ow
n
,
t
h
e
powe
r
se
n
so
r
(as
pa
r
t
of
t
h
e
m
eas
ur
e
m
e
n
t
s
y
s-
te
m
)
mu
st
m
eas
ur
e
powe
r
f
r
o
m
-35
to
+20
dBm
(50
11)
.
71
73
Table of Contents
Table of Contents
4
General Information
9
Introduction
9
In Struments Covered by Manual
9
De Sc R Iptio N
9
O P B Tio N S
10
Atte Ry
11
Sa F et y Co N S ID E R at I O N
11
HP M Odel 435 Β a
11
R Ecommend Ed Test Equipment
11
I Nstall Atio N
13
Introduction
13
Preparation for Use
13
T I a L in S P Ect I O N
13
Mete R
14
Ower Cable
14
Oltage Selection
14
L Ect I O N
14
Interconnections
14
L I N E V Oltage Selection
14
Operat Ing Environment
15
B Ench O Peration
15
F R Ac K Moun Ting
15
M Ains Plu Gs Available
15
B Atte Ry Installation
16
Ow er Mete R
16
3-12 . Battery
20
Rea R Pa N E L Co N Trol S, Connectors and Ind Icato R S
22
Oper Ator's C He Cks
23
O Per Ating Instru Ct I O N S
25
Per Atio N
26
Specified Uncertainties
27
Calculating M
29
Eas Ureme Nt un Certa Inties
29
Mismatch un Certai Nties
30
Calculating M Eas Ureme Nt un Certai Nty
31
Introduction
32
In Eas
32
R St Case
32
CC Ur
32
Ac Ur
32
Perf O Rm an Ce te Sts
34
Eco Rd
34
Rf Rm Ce Tests
34
Power Reference
34
Est
35
Z Ero Carryover Test Set up
35
Erform Ance Est
37
Est
38
Ad Ju St Men Ts
40
Introduction
40
N S
40
Ad J
40
Locations
40
Specifications
40
Actory Selected Co Mponents
40
Ower Reference Oscillator Level Adjustment
42
P Ower Reference Osc Ill Ator Level
43
Multivibrator Adjust Ment
45
Ower Meter Adjustments with 50Ω P
47
P Ower Meter Ad
47
Owe R Sensor
48
O W E R M Ete R Ad J U St M E N Ts Wi T H Ca Libr Ato R
50
With Calibrator
50
Repl Ac
52
Section E ABLE P V I a RTS
52
Introduction
52
Abbreviations
52
E Pl Acea Bl E P
52
Actory Se Lecte D Parts (*)
52
Orderin G in St Ructions
52
Arts Provi Sioning
52
Epl Acea Ble Parts
52
Ma Nu al Chan G es
63
Introduction
63
Manual Change in Structions
63
Servic E
65
Introduction
65
Sa F et y Co N S ID E R at I O N
65
H Eets
65
Fr O N T
69
Ower Sensor
77
Sc Hem at IC
78
Ge Neral Se Rvi Ce Inf Orm at Ion
79
Ca Libr Ato R
79
Oa Rd S
81
Ρ/Ο Α4 Ass Embly
82
Ρ/0 Α
86
P Ower S Upply
89
Operational Amplifiers
90
Ρ/Ο Α4 Assem Bl y
92
Ρ/Ο Α4 Ass Embly
99
Ower Refere Eference Assembly
107
Sc Hematic Diagram
107
Ocatio Ns
108
Ero
110
5
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HP 435B Specifications
General
Brand
HP
Model
435B
Category
Measuring Instruments
Language
English
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