Calibration—475
b.
Connect the preamp end of the delay line to the
output of the Signal Insertion Unit (067-0676-00).
c.
Connect the Signal Insertion Unit to +15 volts and —8
volts from the 475.
d.
Connect the Fast-Rise High-Amplitude Pulse Genera
tor (Type 109) to the Signal Insertion Unit via a 50 12 5 ns
GR cable, a X 5 GR attenuator Signal Pickoff Unit (Type
CT-3), and a GR-to-BNC adapter.
e.
Connect the 10% output BNC connector of the Signal
Pickoff Unit (Type CT-3) to the A External Trigger input
via an 18-inch 50 12 BNC cable and a 50 12 BNC termina
tion.
f.
Adjust the Pulse Generator for 5 divisions of deflec
tion, + Polarity.
g.
CHECK—CRT display for flat-top waveform with no
more than 10% overshoot on the leading edge.
h.
A D JU ST—C450, R450, C466, R466, C470, R470
(see Fig. 5-16), for best flat-top waveform.
i.
CAL A ID —Adjust C450 and R450 for minimum
aberrations; C466 and R466 for flat response over the first
5 ns; C470 and R470 for flat response over the first 15 ns.
R450 should be adjusted as far counterclockwise as
possible.
j.
IN T E R A C T IO N -B etw een all adjustments in this step.
Re-adjust for best flat-top response.
Fig. 5-16. Location of vertical output high-frequency adjustments.
k.
Disconnect the test setup and reconnect the Delay
Line to the Vertical preamp.
31. Adjust High-Frequency Compensation
a. Connect the fast-rise output of the Square-Wave
Generator (Type 106) to the CH 1 input via a 42-inch 50 12
BNC cable and a 50 12 BNC termination.
b. Set the CH 1 AC-GND-DC switch to DC and the
V O L T S /D IV switch to 5 mV.
c. Adjust the Square-Wave Generator for a 5 division
display of a 10 kHz signal.
d. CHECK—C RT display for flat-top waveform within
+4%, —4%f or a total of 4% aberrations.
e. A DJU ST—R 139 and R475 (see Fig. 5-17 & 5-18) for
the best flat-top waveform.
C l 33 - H I39
Fig. 5-17. Location of high-frequency compensation adjustments.
Fig. 5-18. Location of R 475, C471, and C477.
5-35
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 ...