Troubleshooting
0.5
V/GHz Output
Errors
Error
Group
Description
6
=
2
F
ailure
at 1.0
GHz
6
=
8
F
ailure
at
3.0
GHz
6
=20
F
ailure at
6.0 GHz
6
=
80
F
ailure
at
9.0
GHz
6
=
200
F
ailure
at
12.0
GHz
6
=800
F
ailure at
15.0 GHz
6
=
2000
F
ailure
at
18.0
GHz
6
=
8000
F
ailure
at
20.0
GHz
7
=
2
F
ailure
at
0.01 GHz
1.
Connect
a
voltmeter
to
pin 5
of J1
on the
microprocessor assembly
(A3)
(connect
the
voltmeter
ground
lead
to
A3TP4).
2.
Set
the
synthesizer
output
frequency
to
the
frequency
specied
in
the
error
message
(if
more
than
one
frequency
point
failed,
set
the
output
frequency
to
the
lowest
frequency
specied).
3.
Verify
that the
voltage
at
J1
is
within
the
tolerance
shown
in
the
following
table
.
Frequency V
oltage
1.0
GHz
0.5
V
6
0.50 V
3.0 GHz 1.5 V
6
0.50
V
6.0
GHz
3.0
V
6
0.50
V
9.0
GHz
4.5
V
6
0.50
V
12.0
GHz
6.0
V
6
0.50
V
15.0
GHz
7.5
V
6
0.50
V
18.0
GHz
9.0
V
6
0.50
V
20.0
GHz
10
V
6
0.50
V
0.01
GHz
5
mV
6
0.5 V
If
the
voltage
is within
tolerance,
check the
continuity of
W8
between
J1
pin
5
and
the
0.5V/GHz
output connector
and replace
it if
necessary.
If the
voltage is
out of
tolerance
,
continue
with
the
next
step
.
4. P
erform the adjustment procedure \0.5 V/GHz Output A
djustment" in the Calibration Guide
.
If the 0.5 V/GHz output cannot be adjusted using the procedure or the self test still fails
,
replace the microprocessor assembly
. If it can be adjusted successfully
, rerun the self test to
ensure
that the 0.5 V/GHz output is functioning at all tested frequencies
.
1-10 Troubleshooting