Wavetek 180 - Page 16

Table 5-1. Calibration Chart (Continued)
Step
Check Tester
Gal
Points
Control
Setting
Adjust
Desired
Results
Remarks
4
VCG null
Scope (50n
terminated)
FREQIVIULTX 100K
Function ""L
Dial full cw
Scope vert 2V/div
Scope horiz .5 ms/div
R43
Minimum fre
quency shift
Adjust generator dial
for 1 full square on
scope. Alternately
short and open VCG
IN BNC while adjust
ing R43.
5
Horizontal
symmetry
Scope X 10 on
R47 Maximum sym
metry
Alternately switch
scope triggering from
positive to negative
slope while adjusting
R47.
6
Dial 0.1
FREQMULTX 10
Scope sweep O.ls/div
DC triggering
R66
Maximum sym
metry
For 180LF, FREQ
MULT X 1.
Scope sweep Is/div.
7 Frequency
accuracy
Counter (5012
terminated)
Dial 2.0
FREQ MULT X 1
thru X 10K
R39
Best frequency
accuracy over X 1
thru X 10K
8
FREQMULT X 1M
Function \ \ ^
C19
Best frequency
accuracy for all
waveforms
9 DC level
Voltmeter (5012
terminated)
FREQMULT X IK
Function DC
Amplitude ccw
R125 0 ±20 mVdc
1
5-2