Tektronix 475 User manual

TEKTRONIX

475
OSCILLOSCOPE
AND
DM43 / DM40
DIGITAL
MULTIMETERS
Tekt ronix , Inc.
P.O. Box 500
Beavert on , Oregon
97077 INSTRUCTION
MANUAL
070-1739-01
Serial Num ber
First
Print ing
OCT
1974

WARRANTY
1
All
TEKTRONIX
inst rum ent s are
warranted
against
defect ive
m at erials
and
work m anshi p for one year .
Any quest ions with respect to the warranty should
be taken up with your TEKTRONIX Field Engineer or
representat ive .
All request s for repairs and replacem ent part s
should be direct ed to the TEKTRONIX Field Office
or representat ive in your area . This will assure you
the fast est
possible service
. Please include
the
inst rum ent Type Num ber or Part Num ber and Serial
Num ber with all request s for part s or service .
Specificat ions and price change privileges reserved .
Copyright  1974 by Tekt ronix , Inc. , Beavert on ,
Oregon
.
Print ed in the United
States of
Am eri ca . All
right s reserved . Content s of this publication m ay not
be reproduced in any form without perm i ssi on of
Tekt ronix
,
Inc.
U.S.A. and foreign TEKTRONIX product s covered
by U.S. and foreign patents and / or patents pending .
TEKTRONIX is a regi st ered t radem ark of Tekt ronix ,
Inc.

TABLE OF CONTENTS
BEFORE OPERATING
Page
BASIC
OSCILLOSCOPE
DISPLAYS ( cont
)
Page
INTRODUCTION
1
DELAYED
SWEEP
DISPLAY
17
SAFETY INFORMATION
1
MIXED SWEEP
DISPLAY
18
OPERATING VOLTAGE
2
X - Y DISPLAY
18
OPTIONS
3
SINGLE
SWEEP
DISPLAY
19
CONTROLS ,
CONNECTORS
AND INDICATORS
DM43
/
DM40 DISPLAYS
AND
MEASUREMENTS
VERTICAL
4
RESISTANCE
20
DISPLAY
6
VOLTS
22
DM43 / DM40
6
TEMPERATURE ( DM43 ONLY )
24
TRIGGER
8
APPLICATIONS
AND
MEASUREMENTS
HORIZONTAL , CALIBRATOR , AND POWER
12
PRELIMINARY
28
29
REAR PANEL
14
OPERATOR’S ADJUSTMENTS AND CHECKS
SIDE PANEL
15
PEAK
- TO
-
PEAK VOLTAGE
MEASUREMENTS
-AC
31
BASIC OSCILLOSCOPE DISPLAYS
INSTANTANEOUS
VOLTAGE
MEASUREMENTS
-DC
NORMAL SWEEP DISPLAY
16
32
MAGNIFIED SWEEP DISPLAY
17 ALGEBRAIC
ADDITION
34
REV . B , SEPT 1974
475 and
DM43
/
DM40
Operat ors
i

TABLE OF CONTENTS ( cont )
APPLICATIONS
AND
MEASUREMENTS ( cont )
Page
APPLICATIONS
AND
MEASUREMENTS ( cont
)
Page
COMMON - MODE REJECTION
35
DM43 / DM40
DELAYED
OR
MIXED
SWEEP TIME MEASUREMENTS
48
AMPLITUDE
COMPARISON
MEASUREMENTS
36
TIME
DURATION
MEASUREMENTS
37
Tim e Difference Between Repetit ive
Pulses
(
DM43
/
DM40
)
48
FREQUENCY MEASUREMENTS
38
49
RISETIME MEASUREMENTS
39
Tim e Duration ( DM43 / DM40 )
Frequency ( DM43 / DM40 )
50
40
Tim e Difference
Between
Two
Pulses
From
Different
sources
( DM43 /
DM40 )
51
TIME - DIFFERENCE BETWEEN TWO
PULSES FROM DIFFERENT SOURCES
TIME COMPARISON MEASUREMENTS
BASIC 475 DELAYED OR MIXED
SWEEP TIME MEASUREMENTS
41
Riset im e
(
DM43 / DM40
)
52
Mix ( DM43 /
DM40 )
53
42
DELAYED OR
MIXED SWEEP MAGNIFICATION
53
42
Magnified
Sweep
Start s
Aft er
Delay
53
43
Triggered Delayed Sweep Magnification
55
44
Tim e
Difference
Between
Repetit ive
Pulses (
Basic 475 )
Tim e Duration Measurem ent s ( Basic 475 )
Frequency
(
Basic
475 )
Tim e Difference Between Two Pulses From
Different sources ( Basic 475 )
Riset im e (
Basic
475
)
Mix (
Basic 475 )
PHASE DIFFERENCE
MEASUREMENTS
56
45
HIGH RESOLUTION PHASE
DIFFERENCE MEASUREMENTS
47
57
48
PULSE JITTER MEASUREMENTS
58
ii
475
and
DM43
/
DM40
Operat ors
REV . B. SEPT 1974

TABLE OF CONTENTS ( cont )
OPERATOR’S SPECIFICATIONS Page
OPERATOR’S
SPECIFICATIONS ( cont
) Page
VERTICAL
59
TEMPERATURE
- DM43 ONLY
, WITH
PROBE
63
TRIGGERING
60
DC VOLTAGE DM43 / DM40
63
AC
POWER SOURCE
64
60
DIFFERENTIAL TIME
MEASUREMENT ( BASIC 475 )
DIFFERENTIAL TIME
MEASUREMENT ( DM43 / DM40 )
ENVIRONMENTAL
64
61
ACCESSORIES
HORIZONTAL
61
STANDARD
ACCESSORIES
INCLUDED
65
CALIBRATOR
61
OPTIONAL
ACCESSORIES
65
Z - AXIS INPUT
62
OUTPUTS
62
OPTIONS
RESISTANCE
DM43 / DM40 62
OPTION 4
66
TIME DM43 / DM40
62
OPTION 7
66
iii
REV . B , SEPT 1974 475 and
DM43
/
DM40
Operat ors

om
B
417
REST
i
1739-1
1739-2
Basic
475
Oscilloscope
. 475 Oscilloscope with DM 43 digit al m ult im eter .
475 and
DM43
/
DM40
Operat ors
REV . B , SEPT 1974

BEFORE OPERATING
INTRODUCTION The
DM40 is
identical to the
DM43
,
except
that the
DM40 lacks t em perat ure m easurem ent capabilit y .
SAFETY INFORMATION
The
Tekt ronix 475
Oscilloscope
is a
dual -
channel
,
port able inst rum ent . The dual - channel dc - to - 200 MHz
vert ical syst em provides calibrat ed deflection fact ors from
2
m illi volts
to
5 volt s /
division
. The
sweep
trigger
circuit s
are capable of stable triggering over the full bandwidt h
capabilit ies of the vert ical deflection syst em . The horizon
tal deflection syst em provides calibrat ed sweep rat es from
0.5 second to 0.01 m icrosecond / division along with
delayed sweep features for accurat e relat ive - t im e
m easurem ent s . A X10 m agnifier ext ends the calibrat ed
sweep rat e
to 1
nanosecond
/ division
. The
inst rum ent
operat es over
a wide
variat ion of line
volt ages and
frequencies . Maxi m um power consum pt ion is about 100
wat ts .
The
inst rum ent
is
designed to
operat e from a
single
phase power source with one of the current - carrying
conductors ( the Neutral Conduct or ) at ground ( eart h )
pot ent ial . Operat ion from power sources where bot h
current - carrying conductors are live with respect to
ground ( such as phase - to - phase on a three - wire syst em )
is not recom m ended , since only the Line Conduct or has
over - current ( fuse ) prot ection within the inst rum ent .
The Tekt ronix DM43 Digit al Muli tm eter m easures o
ohm s to 20 m egohm s , dc volt s to 1200 dc volt s ( + or - ) or
-55  C to + 150  C and displays the m easurem ent on a
digit al display while the oscilloscope operat es norm ally .
The digit al m ult im eter and oscilloscope com bine to
provide a digit al readout of the t im e between any two
poi nt s on the
oscilloscope display .
The inst rum ent has a three - wire power cord with a
three - t erm i nal polarized plug for connection to the power
source and safety - eart h . The ground ( eart h ) t erm i nal of
the plug is direct ly connected to the inst rum ent fram e . For
elect ric - shock prot ection , insert this plug only in a m at ing
outlet with a safety - eart h contact .
REV . B , SEPT 1974
475 and
DM43 / DM40
Operat ors
1

OPERATING VOLTAGE
To
change the
regulating
range
:
1. Disconnect the inst rum ent from the power source .
CAUTION
2. Loosen the two captive screws that hold the cover
on the select or assem bly ; then pull to rem ove the cover .
Thi s inst rum ent m ay be dam aged if operat ed with
the line volt age select or switch or the regulating
range select or set for the wrong applied line volt age
or if the
wrong line
fuse is
used
.
3. Pull out the range select or switch bar ( see Fig . 1 ) .
Select a
range from
Table
1
which is
centered
about the
average
line
volt age .
Slide the bar to
the
desired
position
and plug it in . Push
the cover on
and tighten the
screws .
TABLE 1
Regulat ing
Ranges
Line
Voltage Select ion
Thi s inst rum ent operat es from eit her a 115 - volt or a
230 - volt nom inal line volt age source , 48 to 440 hertz . To
convert from one nom inal line volt age range to the ot her ,
m ove the Line Voltage Select or switch ( locat ed on side
panel ) to indicate the correct nom inal volt age . A 115 - to
230 volt adapter m ay be required for the line - cord plug . Be
sure to use the correct line fuse for the line volt age
select ed
(
see Table 1 ) .
Range
Select or
Switch Posit ion
Regulat ing
Range
115 - Volts 230 - Volts
Nom inal Nom inal
99 to 121
volt s
198 to 242
volt s
LO ( Switch bar
in
lower
holes )
M (
Switch bar
in
m iddle
holes
)
HI (
Switch
bar
in
upper
holes )
Fuse Size
104 to 126
volt s
207 to 253
volt s
Regulat ing
Range
Select ion
The Regulat ing Range Select or assem bly ( locat ed on
the rear panel ) is set for one of the line volt age ranges
shown in Table 1. It also contains the line fuse for overload
prot ection .
108 to 132 volt s
216 to 264
volt s
1.5 A 3AG
Fast - blow
0.75 A 3AG
Fast - blow
2
475 and
DM43
/
DM40 Operat ors
REV . B. SEPT
1974

OPTIONS
Options are available to alt er oscilloscope perform ance
to m eet part icular applications . A num ber in eit her MOD
slot ( see It em
53 ,
Controls ,
Connectors , and
Indicators )
indicates a
m odi fi ed
oscilloscope .
AGATE
300
TES
NA
SA
100
X 12
SELECTOR SWITCH BAR
( SHOWN
IN
MEDIUM
POSITION )
Toy
B GATE
5008 5.3
2304
* 33 /
SOWATCH
OR
STRAUMERIONTSOE RLARI
P808 POWER
CH VERT
SIGNAL OUT
SG 2010


EXT
2
AXIS 15 KG
POSITE GING
ABOVE
GHO
DECREASES
PROBE
POWER
LINE FUSE
1739-1
Fig . 1. Regulat ing range select or and line fuse .
REV . B , SEPT 1974
475
and DM43 /
DM40
Operat ors
3

2
4
CONTROLS , CONNECTORS
AND INDICATORS
5
RANGE
2020
2012
20202
203
FUNCTION
ZONO
vous OHMS
TITAE
TEMPECE
VERTICAL
om os
AZ
OSCILLOSCOPE
3
MOLTS /
CM3
1. CH 1 and CH 2 VOLTS / DIV
Select s the vert ical
deflection fact or in a 1-2-5 sequence ( VAR control m ust be
in the calibrat ed detent for the indicated deflection fact or ) .
7
6
VERY
9
MODE
**
8
2. VOLTS / DIV Readout - Consist s of two sm all lam ps
for each channel , locat ed beneat h the skirt of each
VOLTS / DIV knob . One or the ot her lam p will light up to
indicate the correct deflection fact or when a probe with a
scale -
switching connector is
used . A probe
without
this
connector lights the X1 lam p .
5
4
2
3
6
SOCUS
SCALE
RIN
LA
3. VAR  Provides continuously variable uncalibrated
deflection fact ors between the calibrat ed sett ings of the
VOLTS / DIV switch , and ext ends the m axi m um vert ical
deflection to at least 12.5 volt s per division ( 5 volt
position ) .
( 10
7
1
1739-4
4.
UNCAL
Lam p
Indicates when the VAR
VOLTS / DIV control is out of the calibrat ed detent and the
vert ical deflection fact or is uncalibrated .
Fig . 2. Vert ical controls , connectors , and indicators .
4
475
and DM43 /
DM40
Operat ors
REV . B , SEPT 1974