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5
SECTION
ALIGNMENT
5.1
FACTORY
REPAIR
Wavetek
maintains
a
factory repair
department
for
those
customers
not
possessing
the
necessary personnel
or
test
equipment
to
maintain the instrument.
If
an
instru-
ment
is
returned
to
the factory
for
alignment
or
repair,
a
detailed description
of
the
specific
problem
should
be
attached
to
minimize turnaround
time.
5.2
REQUIRED TEST EQUIPMENT
VoltmeterMicrovolt
dc
measurement
(1
%
accuracy)
Oscilloscope
>60
MHz
bandwidth
Counter
4
MHz
(0.1%
accuracy)
50Q
Feedthru
±
1
%
accuracy,
2W
Distortion
Analyzer
To 400 kHz
RG58U
Coax
Cable
...
3
ft
length
BNC
male
contacts
5.3
REMOVING GENERATOR COVERS
1
.
Invert
the instrument
and remove
the four
screws
in
the
bottom
cover.
2.
Turn
the instrument
upright;
remove
the top
cover
for
access
to
generator alignment
controls.
3.
When
alignment
is
complete, secure
the
bottom
cover
with four
screws.
NOTE
Remove
the
cover
only
when
it
is
necessary
to
make
adjustments
or
measurements.
5.4
ALIGNMENT
After referring to
the following preliminary data,
perform
alignment,
as necessary,
per
table
5-1
.
If
performing
par-
tial
alignment,
check
previous
settings
and
adjustments
for applicability.
See
figure
5-1
for
alignment
control
location.
The
completion
of
these
calibration
procedures
returns
the instrument
to
correct
calibration.
All
limits
and
tolerances given
in
these procedures are
calibration
guides
and
should
not
be
interpreted
as instrument
specifications.
Instrument
specifications
are given
in
section
1
of this
manual.
1
.
All
measurements
made
at
the
FUNCTION
OUT
con-
nector
must be
terminated
into
a
50Q(±
1
%)load.
2.
Start
the
alignment by connecting
the
unit
to
an
appropriate
ac
power
source
and
setting
the
front
panel switches
as
follows:
POWER
ON
Frequency
Dial
4.0
FREQ MULT
(Hz)
X
IK
MODE
CONT
FUNCTION
.
.
.
DC OFFSET
OFF
AMPLITUDE
MAX
3.
Allow the
unit to
warm
up
at least
30
minutes
for
final
alignment.
Keep
the instrument
cover
on
to
main-
tain heat.
Remove
cover
only
to
make
adjustments
or
measurements.
Table
5-1.
Alignment Procedure
Step
Check
Tester
Test
Point
Control Setting
Adjust
Result
Remark
1
Power
Supply
Voltmeter
C4 +
Paragraph
5.4,
Step
2
+
15
±
.75V
Verify.
±
15V should
track
within
30
mV
2
C5 -
-15
±
.75V
3
C7 +
+
5
±
.25V
4
C6 -
-5
±
.25V
5
Capacitor
Multiplier
Zero
SW3
-
B
Wiper
R90
0
±2
mV
5-1
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