Agilent Technologies HP 83711B Service Guide

Troubleshooting
LO
Synthesizer
and
Reference
Assembly
(A6)
Troubleshooting
The
following
error
groups
pertain
to
the
LO
synthesizer
and
reference
assembly
.
Error Group Description
8=
Y
Data Readback
Errors
9
=
Y
ABUS
Errors
10
=
Y
Oscillator
Cold
Error
11 =
Y
12
=
Y
LO Synthesizer/Reference
Unlocked/Divide V
oltage
Errors
Note
Prior
to
replacing
an
assembly
or
module,
verify that
the power
supply voltages
are
within
specication at
the power
connection to
the assembly
or
module
.
Data
Readback
Errors
Error
Group
Description
8
=
1
Data
Readback
from
the
LO
Assembly
8
=
2
Data
Readback
from
the
LO
Assembly
8
=
4
Data
Readback
from
the
LO
Assembly
8
=8
Data
Readback from
the LO
Assembly
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.
Using
an
oscilloscope
,
sequentially
probe
pins 6,
8, 10,
and 12
of
P1
on
the
LO
synthesizer
and
reference
assembly
(A6)
(connect
the
oscilloscope
ground
lead
to A3TP4
and set
the
timebase
to
10

s/division).
Preset
the
instrument
while
probing each
pin. If
TTL
level
activity
is
not
seen
on
one
or
more of
these pins
, continue
with the
next
step
.
If
TTL
level
activity
is seen
on all
pins,
replace
the
LO
synthesizer
and
reference
assembly
.
3.
Sequentially probe
pins 6,
8, 10,
and
12
of
J2
on
the
microprocessor
assembly
(A3).
Preset
the
instrument while
probing each
pin. If
activity is
not
seen
on
one
or
more
of
these
pins
,
replace
the microprocessor
assembly.
If activity
is seen,
replace
the
data
cable
(W9).
ABUS
Errors
Error Group Description
9=1 LO Assy ABUS:
Analog Gnd
9=2 LO Assy ABUS: +5 V
9=4 LO Assy ABUS: +13 V
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. Preset the synthesizer.
Troubleshooting 1-11

Agilent Technologies HP 83711B Specifications

General

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