ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 3
Once the above steps have been performed (if required), set the
TIME/DIV OR DLY TIME switch on the dual time base for the
display of desired number of cycles of the input signal.
(b) DualTrace Display. The following procedure will
produce a display of the input signals of two vertical
amplifiers on two traces by the dual time base.
Perform the turnon procedures that were contained in paragraph
(s) 2d(1)(a) through 2d(1)(c)(pages 148 and 149). Once these
procedures have been performed, connect the input signal to the
INPUT connector on each vertical amplifier. Turn the INTENSITY
potentiometer clockwise until the display is visible. If no
display is visible by the midrange position on the INTENSITY
potentiometer, perform the following steps:
Step 1. Press and hold the BEAM FINDER switch.
Step 2. Set the VOLTS/DIV switch on the lefthand vertical
amplifier for the display that remains within the vertical area
of the graticule.
Step 3. Adjust the POSITION potentiometer on the lefthand
vertical amplifier for the desired vertical position of the
display.
Step 4. Adjust the POSITION potentiometer on the dual time base
for the desired horizontal position of the display.
Step 5. Release the BEAM FINDER switch.
Step 6. If necessary, adjust the LEVEL potentiometer on the
dual time base for a stable display.
Step 7. Adjust the FOCUS potentiometer for a welldefined
display.
After these steps have been performed (if' required), set the
VOLTS/DIV switch on the lefthand vertical amplifier for a
display approximately four centimeters in amplitude. Adjust the
POSITION potentiometer on the lefthand vertical amplifier to
place the display in the upper half of the graticule area.
Press the VERT MODE RIGHT switch. Set the VOLTS/DIV switch on
the righthand vertical amplifier for a display approximately
four
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