4. Check ASTIG Control
a.
Rotate ASTIG control (front panel screwdriver adjust
ment) through its range.
b.
CHECK—For dot de-focus at both extremes of the
A STIG control.
c. Reset the ASTIG control for a well-defined dot.
5.
Check Display Controls
a. Rotate SCALE IL L U M control through its range.
b. CHECK—For a smooth increase in illumination.
c. Set the IN T E N S IT Y control to mid-range.
d. Rotate the FOCUS control through its range.
e. CHECK—For trace de-focus at both extremes of the
FOCUS control.
f.
Rotate the IN T E N S IT Y control from fully counter
clockwise to fully clockwise.
g.
CHECK—For trace intensity to increase smoothly
from minimum to maximum intensity.
h.
Reset the IN T E N S IT Y and FOCUS controls for a
well-defined trace.
6. Adjust Trace Alignment
a.
Position the trace to the center horizontal graticule
line.
b.
C HECK—That the trace is parallel with the center
horizontal line.
c.
A D J U S T -T R A C E
R O T A T IO N adjustment (front
panel adjustment) to make the trace parallel to the center
horizontal line.
7. Adjust Y Axis Alignment
a.
Connect 0.1 ms time marks from the Time-Mark
Generator (Type 2901) to the CH 1 input via a 42-inch
50 £2 BNC cable and a 50 12 BNC termination.
Calibration—475
b.
Set the CH 1 AC-GND-DC switch to DC and the CH 1
V O L T S /D IV switch to 0.1 V.
c. Adjust the A LE V E L control for a stable display, the
A STIG and FOCUS controls for a well-defined display.
d. Adjust the VAR T IM E /D IV control for 1 time
marker/division.
e.
C HECK —For no more than 0.1 division of tilt of the
center time marker as compared with the center vertical
graticule line.
f.
A D JU ST—Y Axis Alignment adjustment, R1385, (see
Fig. 5-4) to align the center time marker with the center
vertical line.
g.
IN T E R A C T IO N —Between Y Axis Alignment and
T R A C E R O TA TIO N adjustments. Adjust both for total
optimum response.
8.
Adjust Geometry
a. C HECK —CRT display for no more than 0.1 division
vertical curvature of the time markers across the viewing
area.
b. A D J U S T —G eom etry
adjustment,
R1390
(see
Fig. 5-4) for minimum curvature of the time markers across
the viewing area.
c. Remove the test signal from CH 1 input.
d.
CHECK—For no more than 0.1 division of curvature
of the trace when positioned from top to bottom of the
graticule area.
Fig. 5-4. Location of Y-Axis Align, Z-Axis, and Geometry adjust
ments and test point.
5-27
Summary of Contents for 475
Page 6: ...475 475 Oscilloscope ...
Page 20: ......
Page 46: ......
Page 151: ...A B C D E F G Fig 7 4 P 0 A4 Vertical Mode Switch circuit board ...
Page 152: ...n m m m 1 t siumm c ii im ...
Page 154: ...Diagrams 475 A B C D E F G ...
Page 155: ...GRID LOCATOR Fig 7 8 P O A3 Vertical Preamp circuit board ...
Page 157: ...Diagrams 475 ...
Page 158: ...GRID LOCATOR 2 3 4 5 6 7 8 9 1 10 11 1 12 Fig 7 10 P 0 A3 Vertical Preamp circuit board ...
Page 160: ...Diagrams 475 GRID LOCATOR Fig 7 11 A5 Vertical Output circuit board ...
Page 163: ...Diagrams 475 GRID LOCATOR Fig 7 12 P O A8 Trigger Generator And Sweep Logic circuit board ...
Page 167: ... 415 OSCILLOSCOPE B T R IG G E R G E N E R A T O R g B TR IG G E R GEN ER A TO R ...
Page 168: ...Diagrams 475 GRID LOCATOR ...
Page 172: ...SWEEP G E N ER A TO R S ...
Page 175: ...TIM IN G HORIZONTAL DISPLAY SWITCHING ...
Page 177: ...A 011 HORIZONTAL AMPLIFIER 8 l j k J Ll J Ol Z o N C O X U 1 C L O o v O o _J V v P O in r ...
Page 179: ... 476 OSCILLOSCOPE ...
Page 180: ...POWER SUPPLY ...
Page 182: ...CRT CIRCUIT ...
Page 185: ...C A L IB R A T O R A N D F A N C I R C U I T 4 C A LIB R A TO R FAN MOTOR C IR C U IT ...
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Page 190: ...4 T 475 OSCILLOSCOPE FIG 1 FRO NT PANEL ...
Page 191: ...475 OSCILLOSCOPE FIG 2 MAIN FRAME ...
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Page 200: ...FIG 3 RIGHT SIDE l 475 OSCILLOSCOPE ...
Page 201: ...V S X O t l B O T T OVJ 8 8 ...
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Page 210: ...5 ...
Page 211: ...4 4 75 O S C ILLO S C O P E FIG 5 CAB IN ET ...
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