Wavetek 182A Instruction Manual page 17

Table
5-1.
Alignment Procedure
(Continued)
Step
Check
Tester
Test
Point
Control
Setting Adjust
Result
Remark
6 Approximate
Bottom
of
the Dial
Frequency
Counter
50fi
OUT
HI (termin-
ate
into
50fl
Dial: .004
FREQ
MULT: 10K
R37
20
ms
period
-> Bottom
of the
Dial
Symmetry
Scope
R49
Equalize
(
+
)
and
(-) half
cycles
Set
scope
to (-) trigger;
display
one
full
cycle.
Align positive transition to
center of screen. Multiply the
horizontal display
xlO. Set
scope
(
+
)
trigger;
adjust R49
to align negative transition
with center
of
screen
8 Bottom
of
the
Dial
Frequency
Counter
FREQ
MULT:
xlK
R37 350
±50 ms
period
9
Top
of
the
Dial
Symmetry
Scope
Dial:
4.0
R45
Equalize
(
+
)
and (-)
half
cycles
See step 7
10
Top
of the
Dial
Frequency
Counter
Dial: 4.0
FREQ
MULT:
XlK
R19 4
±
0.2
kHz
11
FREQ
MULT:
xlOK
40 ±.8 kHz
Verify
12 FREQ MULT:
xlM
C34
4
±
.02
MHz
13
FREQ
MULT: x 100K
400
±8
kHz
Verify.
If
necessary,
trim by
changing
value of
C33
14
FREQ MULT: x100
R86
2.5
±
.05
ms
15
FREQ
MULT: x
10 25
±
.5
ms
Verify
16
FREQ: X
250 ±
5
ms
17
Sine
Distortion
Distortion
Analyzer
FUNCTION:
%
FREQ
MULT:
xlK
R97
R114
Adjust for
minimum
distortion
It
may
be necessary
to
reduce amplitude
to
5V peak
18 Output
Amplitude
Scope FUNCTION:
\
R118 10 Vp-p +.3V
-ov
19 Output
Offset
Voltmeter FUNCTION:
%
R112
0V ±
50
mv
20 Baseline
Zero
Scope
MODE:
Trigger R81
0V
±75 mv
It
may
be necessary
to trim the
baseline
with
R80
5-2