Operating Information—475
A T R IG MODE
A T R IG H O LDO FF
External Trigger Input
(not labeled)
A and B Sweep
D E L A Y -TIM E
POSITION
Determines the operating mode for
the A Trigger Circuit.
A U T O : With the proper trigger
control settings, A Sweep can be
initiated by signals that have
repetition rates above about 20
hertz and are within the fre
quency range selected by the
C O U P L IN G
switch.
In
the
absence of an adequate trigger
signal or when the trigger con
trols are misadjusted, the sweep
free-runs to produce a reference
trace.
N O R M : With the proper trigger
control settings, A Sweep can be
initiated by signals that are with
in the frequency range selected
by the COUPLING switch. In
the absence of an adequate trig
ger signal or when the trigger
controls are misadjusted, there is
no trace.
S IN G L SWP: A fter a sweep is dis
played, further sweeps cannot be
presented until the SIN G L SWP
pushbutton is pressed again. The
display is triggered as for NORM
operation using the A Triggering
controls.
Provides control of holdoff time
between sweeps to obtain stable
displays when triggering on aperi
odic signals (such as complex digital
words). Variable can increase hold
o ff time up to at least 9 times the
setting of the T IM E /D IV switch. In
the B ENDS A position (fully
clockwise), the A sweep is reset at
the end of the B sweep to provide
the fastest possible sweep repetition
rate for delayed sweep presenta
tions.
A AND B T IM E /D IV
A T IM E /D IV switch (clear plastic
A ND D E L A Y T IM E
outer flange) selects the basic delay
time (to be multiplied by the
D E L A Y -T IM E POSITION dial set
ting) for delayed-sweep operation.
The B T IM E /D IV switch (inner
dark knob) selects the sweep rate
for A only displays or for the B
portion of a delayed sweep display.
V A R control must be in the cali
brated detent for calibrated sweep
rates.
V A R
Provides continuously variable (un
calibrated) sweep rates between the
calibrated settings of the T IM E /
D IV switch. Varies the A Time Base
sweep rate in the non-delayed mode
of horizontal operation and the B
Time
Base
sweep
rate in the
delayed sweep mode. Extends the
slowest sweep rate to at least 1.25
seconds/division. Sweep rate is cali
brated when the control is rotated
fully clockwise to the calibrated
detent.
UNC AL
Light that indicates when the VA R
T IM E /D IV control is out of the
calibrated detent and the horizontal
sweep rate is uncalibrated.
X 10 MAG Indicator
Light that indicates when the X 10
MAG is turned on.
R EA D Y
Light that indicates that A Sweep
has been prepared to present a
single sweep upon receipt of an
adequate trigger signal.
H O R IZ D IS PLA Y
Selects the horizontal mode of
operation.
A: Horizontal deflection provided
by A Sweep. B Sweep inopera
tive.
Input connectors for external trig
ger signals.
Provides variable sweep delay be
tween 0.00 and 10.00 times the
d e la y
time
indicated
by
the
D E L A Y T IM E switch.
M IX : The first part of the hori
zontal sweep is displayed at a
rate set by the A T IM E /D IV
switch and the latter part of the
sweep at a rate set by the B
T I M E / D I V
switch.
Relative
amounts of the display allocated
to each of the two rates are
determined by the setting of the
D E L A Y -T IM E POSITION dial.
A I N T : Displayed sweep rate deter
mined by the A T IM E /D IV
2-5
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 211: ...4 4 75 O S C ILLO S C O P E FIG 5 CAB IN ET ...
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