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Figure 8-9.  Vertical Amplifier Controls
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TM-9-254 Gearcase Transfer M548 M548A1 (
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Figure 8-10.  Main Triggering Amplifier
TM 9-254 8-5. Oscilloscope Familiarization - Continued e. MAIN TRIGGERING AMPLIFIER (fig. 8-10).  Position controls as follows: (1) Turn LEVEL knob (15) to midrange. (2) Turn SLOPE knob (14) fully clockwise to +. (3) Set the MODE switch (17) to AUTO. (4) Set the COUPLING switch (1) to AC. (5) Set the SOURCE switch (2) to INT. (6) Turn  POSITION  knob  (13)  and  FINE  knob  (12)  to  midrange.    These  controls  allow  for  horizontal movement of displayed waveform. (7) Set magnification to X1 by depressing MAG pushbutton (11). NOTE The TIME/DIV OR DLY TIME switch is four controls in one.  Care must be taken to see that each is positioned properly. (8) Set the inner most TIME/DIV switch (3) to lms position. (9) Set the DLY TIME switch (4) to the lms position and push in. (10)  Turn CAL knob (5) fully clockwise until it clicks in place. (11)  Turn DLYD TRG knob (10) fully clockwise to RUNS AFTER DLY TIME. (12)  Set the SLOPE (8) to +, COUPLING (7) to AC and SOURCE (6) to INT depressing pushbuttons. (13)  Turn DELAY TIME MULT knob (9) to the 0 position. f. Turn On and Adjustment for a Single Trace.  Position the controls as follows: (1) Connect oscilloscope power cord to a power source of proper voltage. (2) Pull POWER switch (8, fig. 8-8) out to apply power to the oscilloscope.  Allow the scope to warm up for at least five minutes.  Turn GRAT ILLUM knob (3, fig. 8-8) until the scale of the CRT is visible. NOTE If a display is visible after completing step (3) below, proceed to step (9). (3) Turn INTENSITY knob (1, fig. 8-8) clockwise until display is visible on the CRT. (4) Press and hold BEAM FIND switch (4, fig. 8-8). 8-15

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