ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 3
3 ADD. Selects signals from both vertical amplifiers for
display. Signals are algebraically added and sums displayed.
4 RIGHT. Selects signal from the righthand vertical
amplifier.
(g) TRIG SOURCE Switches. Alternateaction switches.
1 LEFT. Selects trigger signal from lefthand vertical
amplifier.
2 VERT MODE. Trigger signal automatically follows
vertical displays except when chopped vertical mode is selected.
In the chopped mode, the trigger occurs at 1megahertz rate
under control of internal oscillator.
3 RIGHT. Selects trigger signal from righthand vertical
amplifier.
(h) POWER Switch. Pushpull switch. Controls power to the
(i) CALIBRATOR Connector. Provides a connecting cable for
the calibrator output signal.
(2) VERTICAL AMPLIFIERS. Two are shown in figure 98 on the
following page.
(a) POSITION Control. Controls the vertical position of the
trace.
(b) POLARITY Switch. Provides for display inversion. In the
+UP position, positivegoing input signal causes upward trace
deflection; in the INVERT position, positive going input signal
causes downward trace deflection.
(c) MAG Switch. Provides for decreasing deflection factor.
In the x1 position, the deflection factor is selected by the
VOLTS/DIV switch and the VARIABLE potentiometer; in the x10
REDUCED BANDWIDTH position, the deflection factor is 1/10 that
selected by the VOLTS/DIVE switch and the VARIABLE potentiometer.
(d) GAIN Potentiometer. Controls the deflection factor fine
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