Agilent Technologies HP 83711B Service Guide

Troubleshooting
SLPF
A
(A8A3)
Troubleshooting
The
following
error
groups
pertain
to
the
switched
low
pass
lter
assembly
(SLPFA).
Error
Group
Description
30 =
Y or
31 =
Y
Input Bias
Errors
Output Bias
Errors
Input/Output
Bias
Errors
Error Group Description
30
=
2
F
ailure
at
1.0
GHz,
input
bias
30
=
4
F
ailure
at
1.0 GHz,
output bias
30
=10
F
ailure at
1.65 GHz,
input
bias
30
=
20
F
ailure
at
1.65
GHz,
output
bias
30
=
80
F
ailure
at
2.75
GHz,
input
bias
30
=
100
F
ailure
at
2.75
GHz,
output
bias
30 =
400
Failure
at 4.8
GHz, input
bias
30
=
800
F
ailure
at
4.8
GHz,
output
bias
30
=
2000
F
ailure
at
8.0 GHz,
input bias
30
=
4000
F
ailure
at
8.0
GHz,
output
bias
30
=
10000
F
ailure
at
10.0
GHz,
input
bias
30
=
20000
F
ailure
at
10.0
GHz,
output
bias
30
=
80000
F
ailure
at
12.8
GHz,
input
bias
30
=
100000
F
ailure
at
12.8
GHz,
output
bias
31
=
2
F
ailure
at
.01
GHz,
input
bias
31
=4
F
ailure at
.01
GHz,
output
bias
1.
Install
the
ALC
assembly
in
the
service
position.
Refer
to
the
procedure
\ALC
Board
Assembly
A10"
in
Chapter
5
of
this
manual.
2. Set
the
synthesizer
output
frequency
to
the
failing
frequency
indicated
by
the
self
test.
3. Measure
the
voltage
on
the
following
pins
of
J3
on
the
ALC
assembly
(A10)
with
a
voltmeter (connect
the voltmeter
ground lead
to
A3TP4).
The
expected
voltage
and
tolerance for each pin
is shown in the table
.
Pin
Number
Voltage
15 0 5.5 V
6 0.30 V
26 0 1.55 V
6 0.35 V
27 +7 V
6 0.30 V
28 +7 V
6 0.30 V
31 0 0.75 V 6 0.75 V
If all voltages are within tolerance, continue with the next step. If any of the voltages are
out of tolerance, replace the ALC assembly.
Troubleshooting 1-31

Agilent Technologies HP 83711B Specifications

General

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