PART I I —SHORT-FORM C A LIB R A TIO N
Calibration—475
Introduction
The following procedure is intended to be used as
guidelines for calibration of the 4 75 by experienced
technicians familiar with the instrument. Only essential
information is given. Test Equipment Required is the same
as that given for Part I I I —Calibration.
Preliminary Procedure for Short-Form Calibration
N O T E
This instrument shou/d be adjusted a t an ambient
tem perature o f
+ 2 5 °C (±5°C ) for best overall
accuracy.
1. Remove the dust cover from the 475.
2. Connect the 475 to the autotransformer and set the
line voltage to 115 VAC .
3. Set the controls as given under Preliminary Control
Settings (given prior to Part I —Performance Check). Allow
at least 20 minutes warmup before proceeding.
N O T E
Titles for external controls o f this instrument are
capitalized in this procedure (e.g., IN T E N S IT Y ).
Internal adjustments are initial capitalized only (e.g..
Grid Bias).
POWER SUPPLIES and
D ISPLAY C A LIB R A TIO N
1. Low Voltage Power Supplies
a. A D J U S T - +50 V supply, R1430, ±0.5%.
b. Check— +110 V supply, ±3%.
c. Check— +15 V supply, ±1.5%.
d. Check— +5 V supply, ±1.5%.
e. Check----- 15 V supply, ±1.5%.
f . Check----- 8 V supply, ±1.5%.
g. Check ripple on supplies (except + 1 1 0 V supply) is
2 m V P-P maximum; + 1 1 0 V supply ripple is I V P-P
maximum.
h. Check regulation between 126.5 V and 103.5 V line.
i. Check
LOW
LIN E
indicator
comes
on
below
103 VAC.
2. High Voltage Power Supply
—2450 volts, ±4 9 volts.
3. Adjust CRT Grid Bias
a. T R IG MODE to NORM.
b. Connect DC Voltmeter to TP1364 and adjust IN T E N
S IT Y for a reading of +15 volts.
c. A D JU S T—CRT Grid Bias, R1375, for dimmest dot.
4. Check Display Controls
a. A STIG
b. SCALE IL L U M
c. FOCUS
d. IN T E N S IT Y
5. Adjust Trace Alignment
a. Connect time markers to CH 1 input.
b. A D JU S T—TRACE R O T A T IO N to align trace with
center horizontal line.
c. A D JU ST—Y Axis Alignment, R1385, to align center
time marker with the center vertical line.
5-14
d. Check for no more than 0.1 division curvature.
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 ...