Wavetek 188, Instruction Manual

Page: 28 / 50

Step
18
1 9
20
21
22
23
Check
Top of
the
Dial
Frequency
(Log)
Sine
Distortion
Output
Amplitude
Output
Offset
Baseline
Zero
Sweep
Offset
Table 5·1 . Alignment Procedure
(Continued)
Test
Tester Point
Control
Setting Ad j ust
Result
Dial: 4.0
R22 4
( ± .1) kHz
FREQ MULT: x
1K
Distortion
FUNCTION:
R97
Adjust for
Analyzer
FREQ MULT:
x
1 K R1 1 4
minimum
distortion
Scope
FUNCTION: "v
R1 18 10
Vp.p
( +
.
3
V
/
-
0
V)
Voltmeter
FUNCTION :
"v
R1 1 2 o
( ± 50)
mv
Scope
MOD E :
trigger
R81 o
( ± 75)
mv
Voltmeter
SWP OUT
SWEEP:
CONT,
R9 o
( ± 2) mv
(Unter-
SWP,
LIN (Sweep
mlnated)
bOard)
board)
-Rl�Y
REV
E44
-Rl3-
�
t
I
-cz-
I
'�I
C4
1
I
•
...
CR�
SWEEP 003 J.
OFFSET
�I t3 I
0
I
8'
Ul
1 SW2
Q1
E48
0E39 �
Om
-R1 1-
I
-113-
E47
I
Ci:
I
SWl SW3
R2
OEJI
Figure 5-2. Alignment Point Location,
Sweep Board
Scans
by
ArtekMedia
=>
2011
Remark
It may be necessary
to
reduce
amplitude
to
5V
peak
It may be necessary
to
trim
the
baseline
with
R80