Tektronix 466 User manual

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Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97005
070-1652-00
TEKTRONIX.,
INSTRUCTION MANUAL
Serial Number Bb ct244e cise Printing FEB 1974

WARRANTY
All TEKTRONIX instruments are warranted against
defective
materials
and
workmanship
for
one
year.
Any questions with respect to the warranty should
be taken up with your TEKTRONIX Field Engineer or
representative.
All
requests
for
repairs
and
replacement
parts
should
be
directed
to
the
TEKTRONIX
Field
Office
or
representative
in
your
area.
This
will
assure
you
the
fastest
possible
service.
Please
include
the
instrument
Type
Number
or
Part
Number
and
Serial
Number
with
all
requests
for
parts
or
service.
Specifications
and
price
change
privileges
reserved.
Copyright © 1974 by Tektronix, Inc., Beaverton,
Oregon.
Printed
in
the
United
States
of
America.
All
rights
reserved.
Contents
of
this
publication
may
not
be
reproduced
in
any
form
without
permission
of
Tektronix, Inc.
U.S.A.
and
foreign
TEKTRONIX
products
covered
by
U.S.
and
foreign
patents
and/or
patents
pending.
TEKTRONIX
is
a
registered
trademark
of
Tektronix,
Inc.

TABLE OF CONTENTS
BEFORE OPERATING
Introduction
Operating Voltage
Safety Information
Nominal Line Voltage Range
Options
CONTROLS, CONNECTORS AND INDICATORS
Vertical
Display and Storage
Trigger
Horizontal and Power
Rear Panel
Side Panel
P6062A 10X-1X Probe
BASIC DISPLAYS
Normal Sweep Display
Magnified Sweep Display
Delayed Sweep Display
Mixed Sweep Display
X-Y Display
Single Sweep Display
466/464 Operators
Page
WONo
-
- =
12
14
15
15
16
18
18
19
19
19

IABLE
OF
CONTENTS
(cont)
STORAGE DISPLAYS Page
Storage 20
Save Storage 22
Save Random Events 22
APPLICATIONS AND MEASUREMENTS
Preliminary 23
Operator’s Adjustments and Checks 24
Peak-to-Peak
Voltage
Measurements—AC
26
Instantaneous Voltage Measurements—DC 27
Comparison Measurements 28
Time-Duration Measurements 30
Frequency Measurements 30
Risetime Measurements 31
Time-Difference Measurements 32
Multi-Trace Phase Difference Measurements 33
High Resolution Phase Measurements 34
X-Y Phase Measurements 35
Delayed or Mixed Sweep Measurements 36
Pulse Jitter Measurements 38
Algebraic Addition 38
Common-Mode Rejection 40
466/464 Operators

TABLE OF CONTENTS (cont)
OPERATORS SPECIFICATIONS
Storage
Vertical
Triggering
Horizontal
X-Y
Calibrator
Z Axis Input
Outputs
AC Power Source
Environmental
ACCESSORIES
Standard Accessories Included
Optional Accessories
OPTIONS
Option 4
Option 7
CHANGE INFORMATION
466/464 Operators
Page
41
41
42
43
43
43
aa
44
44
44
45
45
47
47

THE ACCESSORY POUCH ILLUSTRATED SHOULD
REMAIN ATTACHED TO THE OSCILLOSCOPE. IT IS
DESIGNED TO KEEP ACCESSORIES READILY AVAILABLE
AND TO AFFORD THE OSCILLOSCOPE SOME PROTEC-
TION IN TRANSIT.
STORAGE
OR
OPERATION
OF
THE
OSCILLOSCOPE
THE
ADJUSTABLE
CARRYING
HANDLE
IS
DESIGNED
ON
ITS
FOUR
REAR
FEET
IS
NOT
DESIRABLE.
THE
TO
OFFER
CONVENIENT
STABLE,
OPERATING
POSI-
MOST
STABLE
OPERATING
POSITIONS
ARE
ILLUSTRA-
TIONS,
SUCH
AS
THOSE
ILLUSTRATED.
TED.
466 and 464 Portable Storage Oscilloscopes.
466/464 Operators

BEFORE OPERATING
INTRODUCTION
This Operators Manual provides information necessary
to
operate
the
instrument.
Included
are
power
require-
ments;
functions
of
controls,
connectors
and
indicators;
and
methods
for
making
several
different
measurements
of
electrical
phenomena.
Also
included
is
a
procedure
for
checking basic instrument calibration.
The Tektronix 466 and 464 are dual-channel portable
oscilloscopes.
The
466
storage
system
provides
storage
for
displays with a writing speed up to 3000 divisions/
microsecond
(in
the
Fast-Reduced
Scan
mode).
The
464
storage
system
does
not
have
the
reduced
scan
mode
and
the
writing speed is up to 110 divisions/microsecond in the Fast
mode.
The
remaining
features
are
identical.
Storage
view-
time
is
greater
than
15
seconds
at
full-stored
display
in-
tensity—extending
to
more
than
6
minutes
using
reduced
in-
tensity in the Save mode.
The
dual-channel
DC-to-100
MHz
vertical
system
pro-
vides
calibrated
deflection
factors
from
5
millivolts
to
5
volts/division.
The
sweep
trigger
circuits
are
capable
of
stable
triggering
over
the
full
bandwidth
capabilities
of
the
vertical
deflection
system.
The
horizontal
deflection
system
provides
calibrated
sweep
rates
from
0.5
seconds
to
0.05
microsecond/division along with delayed sweep features for
accurate relative-time measurements. A X10 magnifier
extends the calibrated sweep rate to 5 nanoseconds/
division. The instrument operates over a wide variation of
line voltages and frequencies. Maximum power consump-
tion is about 100 watts.
OPERATING VOLTAGE
This instrument operates from either a 115-volt or a
230-volt nominal line voltage source, 48 to 440 hertz.
The line voltage selector switch must indicate the
applied line voltage (115 V or 230 V).
The regulating range selector (Item 52, Controls, Con-
nectors and Indicators) must indicate the regulating range
for the applied operating line voltage.
SAFETY INFORMATION
The instrument is designed to operate from a single-
phase power source with one of the current-carrying
conductors (the Neutral Conductor) at ground (earth)
©
466/464
Operators
1

potential. Operation from 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 (fuse) 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 connected to the instrument frame. For
electric-shock protection, insert this plug only in a mating
outlet with a safety-earth contact.
NOMINAL LINE VOLTAGE RANGE
This instrument may be damaged if operated with the
line voltage selector switch or the regulating range
selector set for the wrong applied line voltage.
To convert 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
115-to-230 volt adapter may be required for the line-cord
plug.
The Regulating Range Selector assembly (located on the
rear panel) is set for one of the line voltage ranges shown in
Table 1.
protection.
It also contains the
TABLE 1
Regulating Ranges
line fuse for overload
Regulating Range
Range Selector
Switch Position
115-Volts
Nominal
230-Volts
Nominal
LO (Switch bar in
lower holes) 99 to 121 volts 198 to 242 volts
M (Switch bar in
middle holes) 104 to 126 volts 207 to 253 volts
HI (Switch bar in
upper holes) 108 to 132 volts 216 to 264 volts
Fuse Size 1.5 A 3AG 0.75 A 3AG
Fast-blow Fast-blow
®
2 466/464 Operators

SELECTOR SWITCH BAR
(SHOWN IN MEDIUM POSITION)
LINE FUSE
4140 4
Fig. 1. Regulating range selector and line fuse.
®
466/464
Operators
To change the regulating range:
1. Disconnect the instrument from 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. 1).
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.
OPTIONS
Options
are
available
to
alter
oscilloscope
performance
to
meet
particular
applications.
A
number
in
either
MOD
slot
(see
Item
54,
Controls,
Connectors
and
Indicators)
indicates
a
modified
oscilloscope.
Refer
to
the
Option
section
at
the
rear
of
this
manual
to
find
any
change
in
operating
instructions
as
a
result
of
the
option.

Ah -0-3
CONTROLS, CONNECTORS AND
INDICATORS
VERTICAL
1. CH 1 and CH 2 VOLTS DIV — Selects the vertical
deflection factor in a 1-2-5 sequence (VARiable control
must be in the calibrated detent for the indicated deflection
factor).
2. VOLTS/DIV READOUT — Consists of two small
lamps for each channel, located beneath the skirt of each
VOLTS/DIV knob. One or the other lamp will light up to
indicate the correct deflection factor when a probe with a
scale-switching connector is used. A probe without this
connector lights the X1 lamp.
3. VAR — Provides continuously variable uncalibrated
deflection factors between the calibrated settings of the
VOLTS/DIV switch, and extends the maximum vertical
deflection to at least 12.5 volts per division (5 volt
position).
4. UNCAL LAMP — Indicates when the VARiable
VOLTS/DIV control is out of the calibrated detent and the
vertical deflection factor is uncalibrated.
4
466/464
Operators
®

5. POSITION — Positions the display vertically. CH 2
POSITION positions the X-Axis (vertical) display in X-Y
Mode.
6. CH 1 OR X and CH 2 OR Y — Input connectors for
application of external signals to the inputs of the vertical
amplifier. In the X-Y mode of operation, the signal
connected to the CH 1 OR X connector provides horizontal
deflection and the signal connected to the CH2OR Y
connector provides the vertical defelection.
7. AC—GND—DC -— Selects the method used to couple
a signal to the input of the vertical amplifier. In the AC
position, signals are capacitively coupled to the vertical
amplifier. The dc component of the input signal is blocked.
In the GND position, the input of the vertical amplifier is
disconnected from the input connector and grounded to
allow the input coupling capacitor to precharge. In the DC
position, all components of the input signal are passed to
the input amplifier.
8. VERT MODE — Selects mode of operation for
vertical amplifier system.
CH 1: Channel 1 only is displayed.
ALT: Provides dual-trace display of the signals of both
channels. Display is switched between channels at the
466/464 Operators
end of each sweep. Useful at sweep rates faster than
about 50 microseconds/division.
ADD: Signals applied to the CH1 and CH 2 input
connectors are algebraically added, and the algebraic
sum is displayed on the crt. The INVERT switch in
Channel 2 allows the display to be CH 1 plus CH 2 or
CH 1 minus CH 2. Useful for common-mode rejection to
remove an undesired signal or for dc offset.
CHOP: Provides dual-trace display of the signals of both
channels. Display is switched between channels at a
repetition rate of approximately 250 kHz. Useful at
sweep rates slower than about 50 microseconds/division,
or when a dual-trace, single-sweep display is required.
CH 2: Channel 2 only is displayed. It must be selected in
X-Y operation.
9. 20 MHz BW/TRIG VIEW — Dual-purpose switch
that limits the bandwidth of the vertical amplifier system to
approximately 20 MHz when pulled, or when pressed,
causes the signal applied to A Trigger Generator to be
displayed on the cert.
10. INVERT — Channel 2 display is inverted in the
INVERT (button in) position.

*|ITEMS 14 AND 15
APPEAR ONLY
ON THE 466
OSITION
we
Pp sto
San
ce vo
a
466/464 Operators

DISPLAY AND STORAGE
11. INTERNAL GRATICULE — Eliminates parallax.
Risetime amplitude and measurement points are indicated
at the left-hand graticule edge.
12. BEAM FIND — Compresses the display to within
the graticule area independently of display position or
applied signals and provides a visible viewing level.
13. INTEN — Controls brightness of the crt display.
14. REDUCED SCAN (PULL — INTEN knob) —
Reduces display to “inner’’ graticule with an increase in
writing rate. 466 only.
15. REDUCED SCAN LAMP — Indicates that the
REDUCED SCAN mode is in operation. 466 only.
16. ASTIG — Used in conjunction with the FOCUS
control to obtain a well-defined display. It does not require
readjustment in normal use.
17. FOCUS — Adjusts for optimum display definition.
18. TRACE ROTATION — Adjusts trace to align with
the horizontal graticule lines.
19. SCALE ILLUM — Controls graticule illumination.
®
466/464
Operators
20. STORAGE LEVEL — Varies the writing rate of the
crt in the FAST and VAR PERS storage modes.
21. SAVE — Provides longer viewing time. It prevents
accidental erasure of the stored display.
22. SAVE INTEN — Varies the intensity of the SAVE
mode.
23. NON STORE — Allows operation of the instrument
as a conventional oscilloscope in the NON-STORE mode.
24. VAR PERS — Permits variable retention of the
stored display.
25. FAST — Used for fast-writing displays. FAST mode
disables the TRIG MODE switch. It automatically se-
quences an erase cycle, unless the VIEW TIME control is in
the full clockwise detent (manual). It waits a time period
determined by the VIEW TIME control, then resets the
sweep in a single-sweep mode.
26. VIEW TIME — Varies the retention time (persis-
tence) of the stored display in the VAR PERS mode. It
varies the time between erase cycles in FAST mode.
27. ERASE — Erases the stored display, except in
SAVE mode when ERASE is disabled.

464-0-9
TRIGGER
28.
TRIG
MODE
—
Determines
the
mode
of
trigger
operation for A Sweep.
AUTO:
Sweep
is
initiated
by
the
applied
trigger
signal.
In
the
absence
of
an
adequate
trigger
signal,
or
if
the
trigger
repetition
rate
is
less
than
about
20
hertz,
the
sweep
free
runs
and
provides
a
bright
reference
trace.
NORM:
Sweep
is
initiated
by
the
applied
trigger
signal.
In
the
absence
of
an
adequate
trigger
signal,
there
is
no
trace.
When
the
trigger
rate
is
too
low
for
AUTO
use
NORM.
SINGL
SWP:
When
this
pushbutton
is
pushed,
the
A
Sweep
operates
in
the
single
sweep
mode.
After
a
single
sweep
is
displayed,
further
sweeps
cannot
be
presented
until
the
SINGL
SWP
button
is
pushed.
It
is
useful
when
the
signal
to
be
displayed
is
not
repetitive
or
varies
in
amplitude,
shape
or
time,
causing
an
unstable
conven-
tional
display.
It
can
also
be
used
to
photograph
or
store
a
non-repetitive
signal.
In
the
FAST
storage
mode,
however,
the
single-sweep
rate
(and
erase
cycle)
is
determined
by
the
VIEW
TIME
control.
466/464
Operators
®

29. READY LAMP — Indicates A Sweep is “armed”
and, upon receipt of an adequate trigger signal, will present
a single-sweep display.
30. TRIG LAMP — Indicates that A Sweep is triggered
and will produce a stable display. It is useful for setting up
the trigger circuits when a trigger signal is available without
a display on the crt (for example, when using external
triggers).
31. A TRIG HOLDOFF — Provides continuous control
of time between sweeps. Allows triggering on aperiodic
signals (such as, complex digital words). In the fully
clockwise position (B ENDS A), A sweep is reset at the end
of B sweep to provide the fastest possible sweep repetition
rate for delayed-sweep presentations and low-repetition rate
signals. Use the A trigger controls for the best possible
display before using the A TRIG HOLDOFF control.
32. COUPLING — Determines method used to couple
signals to trigger generator circuit.
® 466/464 Operators
AC: Signals are capacitively coupled to the input of the
trigger generator. Dc is rejected and signals below about
30 Hz are attenuated.
LF REJ: Signals are capacitively coupled to the input of
the trigger circuit. Dc is rejected and signals below about
50 kHz are attenuated. It is useful for providing a stable
display of the high-frequency components of a complex
waveform.
HF REJ: Signals are capacitively coupled to the input of
trigger circuit. Dc is rejected and signals below about
30 Hz and above about 50 kHz are attenuated. It is
useful for providing a stable display of the low-fre-
quency components of a complex waveform.
DC: All components of a trigger signal are coupled to
the input of the trigger circuit. It is useful for providing
a stable display of low-frequency or low-repetition rate
signals, except the combination of ALT (dual trace)
mode with the trigger SOURCE switch in NORM.

TRIGGER (cont)
33. SLOPE — Selects the slope of the trigger signal that
starts the sweep.
+: Sweep can be triggered from the positive-going
portion of a trigger signal.
-: Sweep can be triggered from the negative-going
portion of a trigger signal.
Correct SLOPE setting is important in obtaining a
display when only a portion of a cycle is being
displayed.
34,
LEVEL
—
Selects
the
amplitude
point
on
the
trigger
signal
at
which
the
sweep
is
triggered.
It
is
usually
adjusted
for
the
desired
display
after
trigger
SOURCE,
COUPLING
and
SLOPE
have
been
selected.
35.
SOURCE
—
Determines
the
source
of
the
trigger
signal
coupled
to
the
input
of
the
trigger
circuit.
NORM:
Trigger
source
is
displayed
signal(s).
It
does
not
indicate
time
relationship
between
CH1
and
CH
2
signals.
However,
stable
triggering
of
non-time
related
signals
usually
can
be
obtained
by
setting
VERT
MODE
re
to
ALT,
SOURCE
to
NORM
and
COUPLING
to
LF
REJ.
Carefully
adjust
LEVEL
for
a
stable
display.
10
466/464
Operators
®

CH 1: A sample of the signal available in Channel 1 is
used as a trigger signal. CH 2 signal is unstable if it is not
time-related.
CH 2: A sample of the signal available in Channel 2 is
used as a trigger signal. CH 1 signal is unstable if it is not
time related.
LINE (A Trigger circuit only): A sample of the
power-line frequency is used as a trigger signal. It is
useful when input signal is time-related (multiple or
sub-multiple) to the line frequency or when it is
desirable to provide a stable display of a line-frequency
component in a complex waveform.
EXT: Signals connected to the External Trigger Input
connectors are used for triggering. External signals must
be time-related to the displayed signal for a stable
display. It is useful when the internal signal is too small
or contains undesired signals that could cause unstable
triggering. It is useful when operating in CHOP Mode.
EXT + 10 (A Trigger circuit only): External trigger signal
attenuated by a factor of 10.
STARTS AFTER DELAY (B Trigger circuit only): B
Sweep runs immediately after the delay time selected by
the DELAY-TIME POSITION dial.
36. EXTERNAL TRIGGER INPUT — Input connector
for external trigger signals.
466/464 Operators 11

12
964-3-6
HORIZONTAL AND POWER
37.
FINE/POSITION
—
Positions
the
display
horizon-
tally
for
A
Sweep,
B
Sweep
or
the
X-axis
in
X-Y
Mode.
38.
X10
MAG
—
Increases
displayed
sweep
rate
by
a
factor
of
10.
It
extends
fastest
sweep
rate
to
5
nano-
seconds/division.
The
magnified
sweep
is
the
center
division
of
the
unmagnified
display
(0.5
division
either
side
of
the
center
graticule
line).
39.
HORIZ
DISPLAY
—
Determines
mode
of
operation
for horizontal deflection system.
A:
Horizontal
deflection
provided
by
A
Sweep
at
a
sweep
rate
determined
by
the
setting
of
the
A
TIME/
DIV
switch.
B
Sweep
is
inoperative.
MIX:
First
part
of
the
horizontal
sweep
displayed
at
a
rate
set
by
the
A
TIME/DIV
switch
and
the
latter
part
of
the
sweep
at
a
rate
set
by
the
B
TIME/DIV
switch.
Relative
amounts
of
the
display
allocated
to
each
of
the
two
sweep
rates
are
determined
by
the
setting
of
the
DELAY-TIME
POSITION
dial.
A
INTEN:
Sweep
rate
determined
by
the
A
TIME/DIV
switch.
An
intensified
portion
appears
on
the
display
during
the
B
Sweep
time,
which
is
about
10
times
the
B
TIME/DIV
switch
setting.
This
switch
Position
provides
466/464
Operators
®

a check of the duration and position of the B Sweep
(delayed sweep) with respect to the delaying sweep (A).
BDLYD: Sweep rate determined by the B TIME/DIV
switch with the delay time determined by the setting of
the DELAY TIME (A TIME/DIV) switch and the
DELAY-TIME POSITION dial.
40. A AND B TIME/DIV AND DELAY TIME — A
TIME/DIV switch (clear plastic skirt) selects the sweep
rate of the A Sweep circuit for A Sweep only operation and
selects the basic delay time (to be multiplied by DELAY
TIME POSITION dial setting) for delayed sweep operation.
B TIME/DIV switch (pull out and rotate to unlock) selects
sweep rate for the B Sweep circuit for delayed sweep
operation only. A VAR control must be in the calibrated
detent for calibrated sweep rates. When both TIME/DIV
switches are fully counterclockwise to the X-Y position, the
horizontal (X-axis) display is the CH 1 input.
41. VAR — Provides continuously variable sweep rates
between the calibrated settings of the A TIME/DIV switch.
It extends the slowest A Sweep rate to at least 1.25
seconds/division. The A Sweep rate is calibrated when the
control is set fully clockwise to the calibrated detent.
42. UNCAL LAMP — Indicates the A Sweep rate is
uncalibrated (VAR control out of the calibrated detent).
43. X10 MAGnifier LAMP — Indicates that the X10
magnifier is on.
44. DELAY-TIME POSITION — Provides variable sweep
delay from 0.20 to 10.20 times the delay time indicated by
the A TIME/DIV switch.
45. POWER — Turns instrument power on and off.
466/464
Operators
13

14
4640-7
REAR PANEL
46. A +GATE — Provides a positive-going rectangular
pulse coincident with the A Sweep time, which can be used
to trigger the signal source.
47. B +GATE — Provides a positive-going rectangular
pulse
coincident
with
the
B
Sweep
time,
which
can
be
used
to
trigger
the
signal
source
after
a
selected
delay
time,
providing that A Sweep is triggered internally.
48.
CH
1
VERT
SIGNAL
OUT
—
Provides
a
sample
of
the
signal
applied
to
the
CH
1
input
connector.
49.
EXT
Z-AXIS
—
Permits
intensity
modulation
of
the
crt
display.
Does
not
affect
display
waveshape.
Signals
with
fast
rise
and
fall
provide
the
most
abrupt
intensity
change.
Signal
must
be
time-related
to
the
display
for
a
stable
display.
Useful
for
uncalibrated
modes
of
operation
and
adding
time
markers.
50.
CALIBRATOR
—
A
combination
current
loop/
square-wave
voltage
output
that
permits
the
operator
to
compensate
voltage
probes
and
check
vertical
gain,
current
probes
and
oscilloscope
operation.
It
is
not
intended
to
verify
time-base
calibration.
51.
LINE
FUSE
HOLDER
—
Contains
the
line
fuse
and
the
regulating
range
selector.
See
Fig.
1
for
change
information.
466/464
Operators
®