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Appendix II. Operation of the LC-4CE
Waveform Generator Circuit
Figure A.2.
LC-4CE bottom cover switches for control of frequency and duration of waveform.
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The waveform generator provides a bipolar square wave centered at 0 V. There are four con-
trols associated with the waveform generator:
Clean
(on back panel)
Clean adj.
(on back panel)
Freq. (Hz)
(on bottom cover)
Time (sec)
(on bottom cover)
The Clean push button starts an electrode cleaning cycle. The Clean adj. button sets
the amplitude of the bipolar square wave. Clockwise rotation increases the amplitude; the
span of the adjustment is 0 to ±'2.2 V.
NOTE: The waveform is symmetrical around 0 V, so if the positive amplitude is set to +1.00
V, the negative portion of the waveform will be –1.00 V.
The other two controls are located on the bottom cover of the LC-4CE (see Figure A.2). Both
controls are 16-position rotary switches.
Freq. (Hz)
1 = 10
2 = 20
3 = 30
4 = 40
5 = 50
6 = 60
7 = 70
8 = 80
9 = 90
A = 100
E = - check
F = + check
Time (sec)
1 = 10
2 = 20
3 = 30
4 = 40
5 = 50
6 = 60
7 = 70
8 = 80
9 = 90
A = 100
B = 110
C = 120
D = 130
E = 140
F = 150
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