Operating Information—475
5. Re-install the cover and tighten the two captive
screws.
6. Before applying power to the instrument, check that
the line voltage selector switch and the indicating tabs on
the regulating range selector assembly are in the correct
positions for the desired nominal line voltage and regulating
range.
A STIG
Screwdriver
adjustment used in
conjunction with the FOCUS con
trol to obtain a well-defined dis
play. Does not require readjustment
in normal use.
TRA CE R O T A T IO N
Screwdriver adjustment to align the
trace with the horizontal graticule
lines.
This instrument may be damaged if operated with the
line voltage selector switch or the regulating range
selector assembly set to incorrect positions for the
line voltage applied.
The 475 is designed to be used with a three-wire AC
power system. If a three-to two-wire adapter is used to
connect this instrument to a two-wire AC power system, be
sure to connect the ground lead of the adapter to earth
(ground). Failure to complete the ground system may allow
the chassis of this instrument to be elevated above ground
potential and pose a shock hazard.
Vertical
Deflection
System
(Channel
1
&
Channel 2)
POSITION
Controls the vertical position of the
trace. In the X -Y mode of opera
tion, the CH 2 control positions on
the Y-axis (vertically) and the CH 1
POSITION control positions on the
X-axis (horizontally).
CH 1 OR X
Input connector for Channel
1
deflection signals or X-axis deflec
tion in the X -Y mode of operation.
C H 2 0 R Y
Input connector for Channel 2
deflection signals or Y-axis deflec
tion in the X -Y mode of operation.
The feet on the rear panel provide a convenient cord
wrap to store the power cord when not in use.
CONTROLS AND CONNECTORS
General
The major controls and connectors for operation of the
475 are located on the front panel of the instrument. A few
auxiliary functions are provided on the rear panel. Fig. 2-2
shows the front and rear panels of the 475. A brief
description of each control and connector is given here.
More detailed operating information is given in the 475
Oscilloscope Operators Handbook.
Cathode-Ray Tube (CRT) and Display
BEAM F IN D
IN T E N S IT Y
Compresses the display to within
the graticule area, independently of
display position or applied signals.
Controls brightness of the display.
FOCUS
Provides adjustment for optimum
display definition.
SCALE IL L U M
Controls graticule brightness.
G A IN (2 and 5 m V)
Screwdriver adjustments to set the
gain of the Vertical Preamp.
V O L T S /D IV
Selects vertical deflection factor in
a 1-2-5 sequence (VA R control
must be in the calibrated detent for
the indicated deflection factor).
V A R
P rovides
continuously
variable
u n ca I i b rated
deflection
factors
between the calibrated settings of
the V O L T S /D IV switch.
UNC AL
Light indicates that the VAR con
trol
is
not
in
the
calibrated
position.
Input Coupling
Selects the method of coupling
(AC-GND-DC)
signal to the input of the Vertical
Amplifier.
AC: Signal is capacitively coupled
to the Vertical Amplifier. DC
component of signal is blocked.
Low-frequency lim it (lower —3
dB point) is about 10 hertz.
GND: Input signal is removed and
the input circuit is grounded.
Does not ground the input sig
nal.
®
2-2
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 ...
Page 215: ......
Page 237: ......
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 ...