Wavetek 182A Instruction Manual page 17

Table
5-1.
Alignment Procedure
(Continued)
Step
Check
Tester
Test
Point
Control
Setting Adjust
Result
Remark
11
12
13
14
15
16
17
Approximate
Bottom
of
the
Dial
Frequency
Bottom
of the
Dial
Symmetry
Bottom
of
the
Dial
Frequency
Top
of
the
Dial
Symmetry
Top
of the
Dial
Frequency
Sine
Distortion
Output
Amplitude
Output
Offset
Baseline
Zero
Counter
50!!
OUT
HI (termin-
ate into
50C1
Scope
Counter
Scope
Counter
Distortion
Analyzer
Scope
Voltmeter
Scope
Dial: .004
FREQ
MULT: 10K
R37
20
ms
period
R49
Equalize
(
+
)
and (-)
half
cycles
Set
scope to
(
-
)
trigger;
display one
full
cycle.
Align positive transition to
center of screen. Multiply
the
horizontal display
x10.
Set
scope
(
+
)
trigger; adjust
R49
to align
negative
transition
with center
of
screen
FREQ
MULT:
x1K
R37
350
±50 ms
period
Dial: 4.0
R45
Equalize
(
+
)
and
(-)
half
cycles
See step
7
Dial: 4.0
FREQ
MULT:
X1K
4
±0.2 kHz
FREQ
MULT:
x10K
40 ±,8 kHz
Verify
FREQ
MULT:
X1M
C34
FREQ
MULT: x 100K
Verify.
If
necessary,
trim
by
changing value
of
C33
FREQ
MULT: x
100
R86
2.5
±
.05
ms
FREQ
MULT: x10
FREQ:
x1
250 ±
5
ms
FUNCTION:
%
FREQ
MULT: x
1
K
R97
R114
Adjust
for
minimum
distortion
FUNCTION:
\
R118 10Vp-p +.3V
-0V
FUNCTION:
%
0V
±
50
mv
MODE:
Trigger
Verify
it
may
be necessary
to reduce amplitude
to
5V peak
It
may
be necessary
to trim the baseline
with
R80
5-2