Tektronix 475 User manual

IEIGrcnix
Teklronix, lnc.
P.O. Box 500
Eeaverlon, Oregon gTOTl INSTtrUCT ION
COMMTTTED TO EXCELLENCE
MANUAL
First Printing JULY 1976
07G2039.00 Serial Number
475
oscrLLos
AND
DM44 DIGITAL
MULTIMETER
OPERATORS
E
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Copyright o 1976 Tektronix, lnc. All rights
reserved. Contents ol this publication may not be
reproduced in any form without the written
permission of Tektronix, Inc.
Products of Tektronix. lnc. and its subsidiaries
are covered by U.S. and loreign patents and/or
pending patents.
TEKTRONIX, TEK, SCOPE-MOerLe, anO @
are registered trademarks of Tektronix, lnc.
TELEQUIPMENT is a registered trademark of
Tektronix U.K. Limited.
Printed in U.S.A. Specification and price change
privileges are reserved.
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TABLE OF CONTENTS
BASIC OSCILLOSCOPE DISPLAYS Page
16
LIST OF ILLUSTRATIONS
LIST OF TABLES
CONTROLS, CONNECTORS. AND
INDICATORS
VEBTICAL
DISPLAY
oM44
TRIGGER
HORIZONTAL, CALIBRATOR, AND POWER
BEAR PANEL
LEFT SIDE PANEL
RIGHT SIDE PANEL
NORMAL SWEEP DISPLAY
MAGNIFIED SWEEP DISPLAY
DELAYED SWEEP DISPLAY
MIXED SWEEP DISPLAY
X.Y DISPLAY
SINGLE SWEEP DISPLAY
'16
17
17
18
18
19
4
4
7
7
8
'12
14
14
14
RESISTANCE
VOLTS
TEMPERATURE
Accuracy Check
TIME AND 1/TIME
APPLICATIONS AND MEASUREMENTS
PRELIMINARY
Signal Ground
Input Coupling Capacitor Precharging
20
20
24
24
27
2A
28
28
28
BEV A JAN 1981 475/DM44 Operators
Page
iv
'|
1
1
2
2
2
3
BEFORE OPERATING
INTRODUCTION
SAFETY INFORMATION
OPERATING VOLTAGE
Line Voltage Selection
Regu lating Range Selection
OPTIONS DM44 DISPLAYS AND MEASUREMENTS
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TABLE OF CONTENTS (cont)
APPLTCATTONS AND MEASUREMENTS (cont) Page APPLTCATIONS AND MEASUREMENTS (conr) Page
42
43
44
45
45
46
48
48
OPERATOR'S ADJUSTMENTS AND CHECKS 29
Trace Rotation 29
Probe Compensation 29
Vertical Gain Check 30
Basic 475 Timing Check 30
DM44 Timing Check 30
External Horizontal Gain Check 31
PEAK.TO-PEAK VOLTAGE
MEASUREMENTS-AC
INSTANTANEOUS VOLTAGE
MEASUREMENTS-DC
ALGEBRAIC ADDITION
COMMON MODE REJECTION
AMPLITUDE COMPARISON
MEASUHEMENTS
TIME.DURATION MEASUREMENTS
FREQUENCY MEASUBEMENTS
RISETIME MEASUBEMENTS
TIME DIFFERENCE BETWEEN TWO
PULSES FROM DIFFERENT SOURCES
TIME COMPAHISON MEASUHEMENTS
31
PHASE DIFFERENCE MEASUREMENTS
HIGH RESOLUTION PHASE DIFFERENCE
MEASUREMENTS
PULSE JITTER MEASUREI\,4ENTS
DELAYEO OR MIXED SWEEP
MAGNIFICATION
Magniried Sweep Starts Alter Delay
Triggered Delay Sweep Magnilication
Besic 475 Delayed or Mixed Sweep Time
Measuremenls
TIME DIFFERENCE BETWEEN REPETITIVE
PULSES (BASTC 475)
TIME DURATION MEASUSEMENTS
(BASTC 475)
FREQUENCY MEASUREMENTS (BASIC 475)
TIME DIFFERENCE BETWEEN TWO PULSES
FROM DIFFEHENT SOUHCES (BASIC 475)
RtSETtME (BAStC 475)
Mrx (BASTC 475)
34
35
36
37
39
40
41
49
50
51
52
I 475/OM44 Operators REV A JAN 1981
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TABLE OF CONTENTS (cont)
OM44 Delayed or Mixed Sweep Tlme
Meeaurements
TIME DIFFEBENCE BETWEEN REPETITIVE
PULSES (DM44)
TIME DURATION MEASUREMENTS (DM44)
FREQUENCY MEASUBEMENTS (DM44)
TIME DIFFERENCE BETWEEN TWO PULSES
FFOI\,,l DIFFERENT SOURCES (DM44)
RTSETTME (DM44)
M rx (DM44)
OPERATOR'S SPECIFICATIONS
475 OSCILLOSCOPE
VERTICAL
TRIGGERING
DIFFEHENTIAL TIME IVEASUREMENT
(BASTC 475)
DIFFERENTIAL TIME IVEASUREMENT
(oM44)
HORIZONTAL
x-Y
CALIBRATOF
Page
54 OPERATOR'S SPECIFICATIONS (cont) Page
56
58
Z AXIS INPUT
OUTPUTS
AC POWER SOURCE
ENVIRONMENTAL
58
60
61
DM44 DIGITAL MULTIMETER
RESISTANCE
TIME
1/TIME
TEMPERATUBE
DC VOLTAGE
65
65
65
65
66
66
66
66
66
66
62
62
63
63
ACCESSORTES
STANDAHD ACCESSORIES
OPTIONAL ACCESSORIES
68
68
68
64
64
64
64
OPTIONS
OPTION 1
OPTION 4
OPTION 7
59
69
69
69
475/OM44 Operalors It
REV A JAN 1981
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LIST OF ILLUSTRATIONS
Page Page
Fig. 1
Fig.2
Fig.3
Fig.4
Fi9.5
Fig. 6
Fig. 7
Fis
Fig
Fig
Fis
Fig
Fis
Fis
Fig
Fig
Regulating range selector and line
fuse. 3
Vertical controls, connectors, and
indicators. 4
Display and DM44 controls,
connectors, and indicators. 6
Trigger controls, connectors, and
indicators. I
Trigger controls, connectors, and
indicators. 10
Horizontal, calibrator, and power
controls, connectors, and indicators. 12
Rear panel and lelt side panel controls,
connectors, and indicators. 15
Resistance. 21
Volts. 23
Temperature. 25
Probe compensation. 29
Basic 475 timing check. 30
DM44 timing check. 31
Peak-to-peak voltage of a waveform. 32
lnstantaneous voltage measurements. 33
Algebraic addilion. 35
Common-mode rejection.
Time duration.
Risetime.
Time difterence between two pulses
from dilferent sources.
Phase dilference.
High-resolution phase dif ference.
Pulse jitter.
Delayed sweep magnif ication.
Time dilference between repetitive
pulses.
Time duration.
Time difference between two pulses
lrom dilferent sources.
Risetime.
Time ditlerence between repetitive
pulses.
Time duration and frequency
measurements.
Time dillerence between two pulses
from diflerent sources.
Riselime.
Fig. 17
Fig. 18
Fig. 19
Fig. 20
36
38
39
F ig. 21
Fiq.22
Fig.23
Fig.24
Fig.2s
40
43
43
44
46
49
50
51
53
57
Fig. 26
Fig.27
8.
9.
10
'11
12
'13
14
15
16
s
F
Fis 28
29
Fig. 30
Fig. 31
Fig. 32
56
59
60
@
475/OM44 Operators
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TABLE 1 Regu lating Ranges
TABLE 2 Resistance Ranges
TABLE 3 Volts Ranges
LIST OF TABLES
Page
TABLE 4 Centigrade to Fahrenheit Conversion 26
TABLE 5 DM44 Delayed Sweep Oisplays 54
Page
2
20
22
@415/Dln44 Operalors
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2039-12
2039-t5
475 Oscilloscope with DM44 Dlgital Multlmeter.
475/DM44 Operalors @
Basic 475 Oscilloscope.
1
tt-!
t3: I
-'
I
tl
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The Tektronix 475 Oscilloscope is a dual-channel
portable instrument. The dual-channel dc-to-200 MHz
vertical system provides ca librated deflection factors lrom
2 millivolts to 5 volts,/division. The sweep trigger circuits
are capable of stable triggering over the lull bandwidth
capabilities of the vertical detlection system. The horizon-
tal dellection system provides calibrated sweep rates trom
0.5 second to 0.0'l microsecond/division along wilh
delayed sweep features lor accurate relative-time
measurements. A X1O magnifier extends the calibrated
sweep rate to 1 nanosecond/division. The instrument
operales over a wide variation of line voltages and
frequencies. Maximum power consumption is about
100 watts.
The Tektronix DM44 Digital Multimeter measures O
ohm to 20 megohms, 0 dc vott to 1200 dc volts (+ or -), or
(using the temperature probe) -55oC to +150"C. The
measurement is displayed on a 3-1/2 digital display while
the oscilloscope operates normally.
BEFORE OPERATING
The digital multimeter and oscilloscope combine to
provide a digital readout ot the time between any two
points on the oscilloscope display. Both time measure-
ment points are displayed on the crt at the same time. The
1/TIME function can provide direct measurement ol
frequency.
SAFETY INFORMATION
The instrument is designed to operate lrom a single-
phase power SOUrce with one of the current-carrying
conductors (the Neutral Conductor) at ground (earth)
potential. Operation lrom power sources where both
current-carrying conductors are live with respect to
ground (Such as phase-to-phase on a three-wire system)
is not recommended, since only the Line Conductor has
over-current (tuse) protection within the instrument.
The instrument has a three-wire power cord with a
three-terminal polarized plug for connection to the power
source and safety-earth. The ground (earth) terminal of
the plug is directly con nected to the instrument rrame. For
electric-shock protection, insert this plug only in a mating
outlet with a salety-earth contact.
1
@475/DM44 Operators
INTRODUCTION
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caurtoll
Line vollage Selection
This instrument operates from either a 11s-voll or a
230-volt nominal line voltaqe source, 48 to 440 hertz. To
converl from one nominal line voltage range to the other,
move the Line Voltage Selector switch (located on side
panel) to indicate the correct nominal voltage. A 1.1s-to-
230 volt adapter may be required forthe line-cord plug. Be
sure to use the correct line luse lor the line voltage
selected (see Table 1).
Regulaling Range Seleclion
The Regulating Range Selector assembly (located on
the rear panel) is set for one of the line voltage ranges
shown in Table '1 . lt also contains the line ruse for overload
protection.
To change the regulating range:
'1. Disconnect the inslrument lrom the power source
2. Loosen the two captive screws that hold the cover
on the selector assembly; then pull to remove the cover.
3. Pull out the range selector switch bar (see Fig. l).
Select a range from Table 1 which is centered about the
average line voltage. Slide the bar to the desired position
and plug it in. Push the cover on and tighten the screws.
TABLE 1
Regulating Ranges
Regulating Range
Range Selector
Switch Position
LO (Switch bar in
lower holes) 198 to 242 volts
M (Switch bar in
middle holes)
Hl (Switch bar in
upper holes)
Fuse Size
230-Volls
Nominal
216 to 264 volts
0,75 A 3AG
Fast-blow
2
11s-Volts
Nominal
99 to '121 volts
104 to'126 volts
108 to 132 volts
,I ,5 A 3AG
Fast-blow
475/DM44 Operalors
OPERATING VOLTAGE
This instrument may be damaged it opercted with
the line voltage selector switch or the rcgulating
rcnge selector set for the wrong applied line voltage
ot il the wrong line luse is used.
207 to 253 volts
@
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