Agilent Technologies HP 83711B Service Guide

Troubleshooting
Note
If this
troubleshooting
procedure
has
determined
that
the
LO
synthesizer
and
reference
assembly
is
functioning
correctly
but
the
self
test
still fails
, the
only
malfunction
on
the
assembly
is
likely
in
the
self test
circuitry.
You
can
optionally
replace
the
microprocessor
assembly
to
restore
self
test
functionality
.
T
o Troubleshoot
an Incorrect
Synthesizer
Divide
V
oltage
Condition
1.
Install the
LO synthesizer
and
reference
assembly
in
the
service
position.
Refer
to
the
procedure
\LO
(Local
Oscillator)
synthesizer/Reference
Board
Assembly
A6"
in
Chapter
5
of
this
manual.
2.
Connect
a
voltmeter
to
P1
pin
2
on
the
LO
synthesizer
and
reference
assembly
(A6)
(connect
the
voltmeter ground
lead
to
A3TP4).
3.
Connect a
frequency
counter
to
the
RF
output
connector
of
the
synthesizer
.
4.
Set
the
synthesizer
output
frequency
to
the
suspected
failing
frequency
.
5.
V
erify
that
the
frequency
at
the
synthesizer
RF
output
connector
is
within
one
count
of the
suspected
frequency
as
measured
on
a
frequency
counter
and
that
the
voltage
at
P1
pin
2
remains
at
a
TTL
low
level.
If
the
frequency
and
TTL
level
are
correct,
the
LO
synthesizer
and
reference
assembly
is
functioning
correctly
.
If
the
frequency
or
TTL
level
is
incorrect,
replace
the
LO
synthesizer
and
reference
assembly
.
Note
If
this
troubleshooting
procedure
has
determined
that
the
LO
synthesizer
and
reference
assembly
is
functioning
correctly
but
the
self
test
still
fails
,
the
only
malfunction
on
the
assembly
is
likely
in
the
self
test
circuitry
.
Y
ou can
optionally
replace
the
LO
synthesizer
and
reference
assembly
to
restore
self
test
functionality
.
Troubleshooting 1-15

Agilent Technologies HP 83711B Specifications

General

Brand	Agilent Technologies
Model	HP 83711B
Category	Test Equipment
Language	English