Wavetek 188 Manual page 24

біер
15
16
17
18
20
21
22
23
Сһеск Tester
Bottom of
the Dial
Frequency
(Log)
Top of
the Dial
Frequency
(Log)
Distortion
Analyzer
Sine
Distortion
(Lin)
Output Scope
Amplitude
Output Voltmeter
Offset
Baseline Scope
Zero
Sweep Voltmeter | SWP OUT | SWEEP: CONT,
Offset (Unter- SWP, LIN
minated)
Test
Point | Control Setting
FREQ MULT: x 10
FREQ: x1
Dial: .0004
FREQ MULT: x 100K
SWEEP: CONT,
STOP, LOG
Dial: 4.0
FREQ MULT: x 100K
FUNCTION: ^v
FREQ MULT: x 1K
MODE: Trigger
Adjust for
minimum
distortion
FUNCTION: ^v
FUNCTION: ^y
Table 5-1. Alignment Procedure (Continued)
Result
250 +5 ms
40 +2 Hz
400 +10 kHz
(+.3V/ — ОМ)
R112 0 +50 mV
OFFSET
0 + 75 ту
Ветагк
Verify
Allow 1 hour
warm-up
Repeat steps 17 and
18 once.
It may be necessary
to reduce amplitude
to 5V peak.
It may be necessary
to trim the baseline
with R80
_ „ASSEMBLY REV
=R=
Figure 5-2. Alignment Point Location, Sweep Board