Calibration—475
c. C HECK —That a stable display can just be obtained by
rotating the B LEV E L control.
d. Adjust the Medium-Frequency signal generator to
increase the CRT display to 0.35 division.
e. A D JU ST—B Trigger Sensitivity adjustment, R785 {see
Fig. 5-20) so that a stable display can just be obtained by
rotating the B L E V E L control.
40. Adjust B Trigger Centering and Symmetry
a. Set both T IM E /D IV switches to 1 0
ms
, both LEVEL
controls to 0, the CH 1 V O L T S /D IV switch to 50 m V , and
the B SOURCE switch to NORM .
b. Adjust the Medium-Frequency signal generator for a 2
division display of a 350 kilohertz signal.
c.
Vertically center the display about the center hori
zontal graticule line.
d.
C HECK—CRT display begins at the same vertical
point in both slopes of the displayed waveform.
e. A DJU ST—B Trigger Symmetry adjustment, R767 (see
Fig. 5-20), so that the trace begins at the same point in
both slopes of the displayed waveform.
f. A DJU ST—B Trigger Centering adjustment, R754 (see
Fig. 5-20), for the trigger point of the display to be at the
graticule center.
g.
CAL A ID —A gap equal to 35 m V should exist
between the + and — trigger points.
41. Adjust A Trigger Centering and Symmetry
a. Set the H O R IZ D ISPLA Y switch to A and the A
SOURCE switch to NORM .
b. C H E C K -C R T display begins at the same vertical
point in both slopes of the displayed waveform.
c.
AD J U S T -A Trigger Symmetry adjustment, R547 (see
Fig. 5-20), so that the trace begins at the same point in
both slopes of the displayed waveform.
d. A D JU ST—A Trigger Centering adjustment, R534 (see
Fig. 5-20), for the trigger point of the display to be at the
graticule center.
e. CAL A ID —A gap equal to 35 m V should exist
between the + and — trigger points.
42. Adjust Trigger DC Balance
a. Set the A COUPLING switch to DC, the A SOURCE
switch to NORM, and the A L E V E L control to 0.
b. Adjust the Medium-Frequency signal generator for a
0.3 division display.
c.
Position the display to the vertical center of the
graticule viewing area.
d.
CHECK—That a stable display can be obtained on
both slopes of the displayed waveform.
e.
A DJU ST—Normal Trigger DC Balance adjustment,
R425 (see Fig. 5-21), so that the display begins at the same
DC level when switching the A COUPLING switch from DC
to AC.
f. Set the A SOURCE switch to CH 1.
g.
C HECK —That a stable display can be obtained on
both slopes of the displayed waveform.
h.
A D JU ST—C H I
Trigger
DC Balance adjustment,
R403 (see Fig. 5-21), so that the display begins at the same
DC level when switching the A COUPLING switch from DC
to AC.
Fig. 5-21. Location of Normal Trigger DC Balance and CH 1 Trigger
DC Balance adjustments.
®
5 4 1
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 ...
Page 189: ......
Page 190: ...4 T 475 OSCILLOSCOPE FIG 1 FRO NT PANEL ...
Page 191: ...475 OSCILLOSCOPE FIG 2 MAIN FRAME ...
Page 199: ......
Page 200: ...FIG 3 RIGHT SIDE l 475 OSCILLOSCOPE ...
Page 201: ...V S X O t l B O T T OVJ 8 8 ...
Page 209: ......
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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Page 241: ... 1 I R I II9A po S IT I o n f i n e I R l 130 PAGE 4 OF 5 R 1234 Ml 9 91 9 473 ...