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Figure 8-10.  Main Triggering Amplifier
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TM-9-254 Gearcase Transfer M548 M548A1 (
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Figure 8-12.  VOLTS/DIV Control
TM 9-254 8-5. Oscilloscope Familiarization - Continued (5) Set VOLTS/DIV switch (2, fig. 8-9) for a display that remains within the vertical area of screen. (6) Adjust POSITION knob (8, fig. 8-9) for desired vertical position of display. (7) Adjust POSITION knob (13, fig. 8-10) for desired horizontal position of display. (8) Release BEAM FIND switch (4, fig. 8-8). (9) If necessary, adjust LEVEL knob (15, fig. 8-10) for a stable display. (10)  Adjust FOCUS knob (2, fig. 8-8) for a well defined display on the screen. 8-6. Waveform Reading. a. General.  By analyzing a waveform that is displayed on the oscilloscope CRT, and observing the position of various  control  settings,  the  voltage  amplitude,  time  between  pulses,  and  frequency  of  the  displayed  waveform  can  be determined. b. Measuring Signal Amplitude.  Amplitude of a displayed signal is always measured along the vertical axis of the graduated scale on the face of the CRT. NOTE The   following   steps   apply    only    to    measuring    the    amplitude    of    signals    displayed    on    the oscilloscope. (1) Perform TURN ON procedures stated in paragraph 8-5f. (2) Depress LEFT vertical mode (14, fig. 8-8). (3) The TIME/DIV OR DLY TIME switch (fig. 8-11) consists of four controls in one.  Set the CAL knob fully clockwise until it clicks.  Set the innermost TIME/DIV switch to the .2ms position.  Set the PULL FOR INTENS PUSH FOR DYLD SWITCH to the .2ms position and push in.  This means that each horizontal square will equal .2 milliseconds of time. Figure 8-11.  TIME/DIV or DLY TIME Control 8-17

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