1
General Information
INTRODUCTION
This
Service
Manual
is
a
guide
to
servicing
the
4395A
Net
w
ork/Sp
ectrum/Imp
edance
Analyzer.
This
man
ual
pro
vides
information
ab
out
p
erformance
test, adjustmen
t,
troublesho
oting
and
repairing
the analyzer.
ORGANIZA
TION
OF
SERVICE
MANUAL
This
man
ual
consists
of
ma
jor
c
hapters
listed
b
elo
w.
The
c
hapters
are
divided
by
tabs. This
section describ
es the
names of
the tabs
and
the
con
ten
t
of
eac
h
c
hapter.
Perfomanc
e
T
est
pro
vides
the
pro
cedures
required for
performance
test
of
the
analyzer.
Calculation
She
et
pro
vides
a
calculation
sheet
for
those
p
erfomance
tests
that
require
additional calculation
to
determine
the
nal
test
results.
Performanc
e
T
est
R
e
c
ord
pro
vides
a
p
erformance
test
record.
The
record
sheets
pro
vides
for
all
test
items.
A
djustments
pro
vides
pro
cedures
for
adjusting
the
analyzer
after
repair
or
replacemen
t
of
an
assem
bly
.
Some
of the
adjustments
up
dates
correction
constan
ts
stored
in
to
the
Flash
R
OM
on
the
A1
CPU
b
oard.
The
correction
constan
ts
is up
dated b
y
using
the
adjustmen
t
program
(PN
04395-18004).
Note
The next
four, four
chapters
are
the
core
troublesho
oting
c
hapters.
T
r
oublesho
oting.
The
troublesho
oting
strategy
is to
systematically
v
erify
p
ortions
of
the
analyzer, and th
us narro
wdo
wn the cause of a problem to the defectiv
eassem
bly. This
chapter is the rst of a series of troublesho oting pro cedures. It c
hecks the op eration
of the
analyzer independen
t of system p eripherals, and suggests
how to remedy system problems.
Power Supply T
roubleshooting
Digital Contr
ol T
roubleshooting
Accessories T
roubleshooting
Each of the ve functional group chapters aboveveries its constituentassemblies until
the faulty assembly is identied.
Accessories Troubleshooting
veries external RF cables
and calibration kit devices.
Accessories Troubleshooting
is the last of the gray-tabbed
troublesho oting chapters.
General Information 1-1
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