Wavetek 143 - Page 25

Step
Table 5-1. Calibration Chart (Continued)
Tester
ТЕ)
14
15
16
Scope
Main
Sym-
metry
Distortion
Analyzer,
Scope
Sine
Distor-
tion
17
19
20
21
Frequency
Counter/
Timer
Trigger Scope
Baseline
Cal
Points
Desired
Results
Control
Settings
Adjust
FUNC-
TION
OUT
Symmetrical wave-
form
FREQ VERNIER:
full cw
Dial: 2.0
FREQ MULT: 1K
Symmetrical wave-
form
Remarks
NOTE: Steps 13 and
14 are interactive.
FUNCTION: ^V R120
Triangle
Balance
Symmetrical
residue
Connect FUNCTION
OUT to distortion
analyzer and distor-
tion analyzer output
to scope. Set scope
to. V/div. Sync scope
to SYNC OUT BNC
loaded into 502.
Minimum sine
distortion
R93,
R107
Triangle
Peaks
If either adjustment is
going near a stop, re-
center both pots and
return to step 15.
FUNCTION: "U R4 2000 +10 Hz
TOD
Freq
Adj
FREQ MULT: 10 R48 20 +0.1 Hz
FREQ MULT: 10M
Dial: Vary
Best frequency
tracking over
X 10M range
Best frequency
tracking over
X 1M range
FREQ MULT: 1M
Dial: Vary
Minimum shift of
baseline around
0 Уас
FUNCTION: ^y
GENERATOR
MODE: TRIG
Dial: Vary
Remove SYNC OUT
cable.
This adjustment must
be made each time
step 20 is done.
5-3