$1)
:1
.~~~:i·
t~:...
.@~
:~
.::.::;.,:~.::_.:.~.,1·
,,:'_:,",:,,:,"'.'_,,~:
::;:;:
cd:
C 1
9J~;,
by
:~i
!W-
ol.~
-bted
In';''
the
A(
resef~';d~,
Contents
of
not
.be
reproduc~;~!~··~i"f.1"""(lm-~;:,<£.lf
of
the
copyright
owner.
Tektronix,
Inc.
Tektronix
International
A.G.
S.
W.
Millikan
Way
Terrassenweg
1A
P.
O.
Box
500
Zug,
Switzerland
Beaverton,
Oregon
PH.
042-49192
,.-'
Phone
MI
4-0161
Cable:
Tekintag,
Zug,
Cables:
Tektronix
Switzerland
070-427
464
CONTENTS
Controls and Connectors
..
0 0 • 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 • 0 0 0 ,
Oscilloscope/Plug-In Combinations 70 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Probe
Informat'ion 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 • 0 0 0 0 0 0 0 0 0 0 0 0 0
Triggering Information 1
0 0 0 0 0 0 0 0
••
0 0 0 0 0 0 0 0 0 0 0 0 0 0
••
0 • 0 ,
Single Sweep Operation
o.
20
0 0 0 0 • 0 0
••
0 • 0 • 0 0 0 0 0 • 0 0 0 0 0 0
Delay Operation
22
0 0
••
0
•••••
0 0 0 0 • 0 0 0 • 0 0 0 0 0 0 0 0 0 0 0 0
••
0
Miscellaneous Operations
24
0 0 0 0 0 0 0 0 0 0 0 0 0 0 • 0 0
.0
0 • 0 • 0 0 • 0
.
585A-l
DOG
ctr
CONTROLS
AND
CONNECTORS
Time-Base Controls
TRIGGERING
LEVEL
(A
and
B)
Determines the point on the triggering waveform
at
which
the sweep
will
start.
STABILITY
(A
and
B)
Adjusts the sweep
for
triggered
or
free running opera-
tion. Can generally be turned full left to
PRESET
for
trig-
gered' operation, except for a
few
extremely
difficult
trig-
gering applications. For free-running operation, STABILITY
control
is
turned full right.
TRIGGER
SLOPE
(A
and
B)
Determines whether triggering occurs during the rise
of
the triggering waveform
(+)
or
during the
fall
of
the trig-
geri
ng
waveform
(-).
TRIGGERING
SOURCE
(Time-Base
A)
Selects the triggering signal source - signal being dis-
played (INT AC, INT
AC
LF
REJECT,
or
INT
HF
SYNC),
power line signal (LINE),
or
signal coupled to TRIGGER
INPUT connector
(EXT
AC,
EXT
DC,
or
EXT
HF SYNC).
TRIGGERING
SOURCE
(Time-Base
B)
Selects the triggering signal source - signal being dis-
played (INT AC,
or
INT AC
LF
REJECT),
power line signal
{LINE},
or
the signal coupled to TRIGGER INPUT connector
(EXT
AC,
or
EXT
DC).
585A-l
1
e...
'.:.
TIME/CM (Time-Base
A)
Determines
sweep
rate
and
horizontal
size
of displayed
waveform. Calibrated
sweep
rates
are
obtained only
when
VARIABLE
control
is
fully
clockwise.
VARIABLE
(TIME/CM-Time-Base
A)
Provides
continuous
uncalibrated
sweep
rates
between
ranges
of TIME/CM
switch.
UNCALIBRATED
indicator lamp
lights
when
the
VARIABLE
control
is
turned
away
from
CALI-
BRATED
posi,tion.
TIME/CM
OR
DELAY
TIME
(Time-Base
B)
TIME/CM
OR
DELAY
TIME
switch
has
two
functions.
When
the
HORIZONTAL
DISPLAY
switch
is
in
the
B or
the
'B'
INTENSIFIED
BY
'A'
posi,tion,
the
switch
determines
sweep
rate
and
horizontal
size
of
the
displayed waveform.
When
the
HORIZONTAL
DISPLAY
switch
is
in
the
'A'
DLY'D
BY
'B'
position,
the
switch
determines
delay
time
along with
DELAY
TIME
MULTIPLIER
con'trol.
LENGTH
,
Adjusts
sweep
length of
TIME
BASE
B
between
approx-
imately 4
and
10
centimeters.
Turning
control counterclock-
wise
reduces
length of
sweep,
increases
duty cycle,
and
brightens display. Normally
LENGTH
control
is
set
fully
clockwise.
585A-'
2
Horizontal Controls
HORIZONTAL
DISPLAY
Determines
the
time
base
used
and
the
type of display
presented.
In
three
TIME
BASE
A positions, A
sweep
is
connect,ed
to horizontal ampli'fier input.
In
two
TIME
BASE
B positions, B
sweep
is
connected to horizontal amplifier
input.
In
the
two
EXT
positions,
an
externally derived
sweep
(applied
to
the
HORIZ
INPUT
connector)
is
connected
to
horizontal amplifier input.
In
X10
posH-ion
of HORIZONTAL
DISPLAY
switch, input signal
to
external horizontal ampli-
fier
is
attenuated
10
times.
In
IBI INTENSIFIED
BY
lA' position,
TIME
BASE
A
is
used
to brighten a portion of
TIME
BASE
B.
In
the
lA'
DLY'D
BY
'B'
position, brightened pori'ion,
as
seen
in
the
'B'
INTEN-
SIFIED
BY
'A' position,
is
expanded
the
full width of
the
screen.
In
'A' position only
TIME
BASE
A
is
used.
In
'B'
position only
TIME
BASE B is
used.
In
'A'
SINGLE
SWEEP
position,
the
RESET
button controls
the
start
o·f
a
single
sweep.
In
all positions of
the
HORIZONTAL
DISPLAY
switch,
except 'A'
and
'A'
SINGLE
SWEEP,
the
delayed trigger
is
controlled by
TIME
BASE
B.
The
time
base
selected
by
the
HORIZONTAL
DISPLAY
switch
is
indicated by
the
lights
above
the
DELAY-TIME
MULTIPLIER
control.
585A-
1
3
5X
MAGNIFIER
Expands
center
two-centimeter portion of displayed wave-
form
to full ten-centimeter width of graticule.
Expanded
portion
is
determined by setting of HORIZONTAL
POSI-
TION
switch.
Indi'cator lamp
is
lit
when
the
5X
MAGNIFIER
is
ON.
RESET
Prepares
sweep
circuits for reception of triggeri
ng
pulse
when
HORIZONTAL
DISPLAY
switch
is
in
lA'
SINGLE
SWEEP
position.
EXTERNAL
HORIZ
A
TTENUATOR
10-1
.
Con'trols
gain of external horizontal amplifier
In
con-
junction
with HORIZONTAL
DISPLAY
switch.
DELAY-TIME
MULTIPLIER
1-10
Ten-turn
control multiplies setting of either TIME/CM
switch
of
TIME
BASE
A,
or TIME/CM
OR
DELAY
TIME
switch
of
TIME
BASE
B.
This
determines
delay
time.
An
indicator lamp, located above
the
DELAY-TIME
MULTI-
PLIER,
will light designating
the
time
base
used,
accord-
Adjusts
horizontaI
posi'l"ion
of trace.
HORIZONTAL POSITION And
VERNIER
4
ing
to
the
setting of
'the
HORIZONTAL
DISPLAY
switch.
585A-l
Checking-Signal Source
AMPLITUDE
CALIBRATOR
Selects
anyone
of
eighteen square-wave output ampli-
tudes,
from
.2
MI
LLiVOLTS
to
100
VOLTS.
Crt Controls
SCALE
ILLUM
Controls brightness
of
graHcule markings.
ASTIGMATISM
Used
in
conjunction
with
FOCUS
con'trol
to
obtain sharp-
ly
focused trace.
INTENSITY
Adjusts
brightness
of
crt display.
FOCUS
Used
in
conjunction
with
ASTIGMATISM
control
to
focus
crt
display.
FOCUS
and
ASTIGMATISM
controls are adjust-
ed together
for
best trace definition.
Front-Panel Connectors
TRIGGER
INPUT
(A
and
B)
Connects external triggering signal to trigger circuitry.
TRIGGERING
SOURCE
switch
must
be pla·ced
in
one
of
EXT
positions.
585A-l
5
HORIZ
INPUT
Connects external signal to external horizontal amplifier.
HORIZONTAL
DISPLAY
switch
must
be
placed
in
one
of
EXT
positions to connect external horizontal amplifier to
horizontal ampl ifier
in
oscillos'cope.
DLY'D
TRIG
Connector supplies
a-
positive-going delayed trigger out-
put.
+
GATE
OUT
(A
and
B)
Supplies positive-going waveform with peak value
of
ap-
proximately
+30
volts. Start and duration.
of
+GATE
A
corresponds to start and duration
of
positive-going sawtooth
waveform available from SAWTOOTH A binding post.
SAWTOOTH A
Supplies a positive-going waveform with peak value
of
approximately +
150
volts. Start
of
waveform coincides
with start
of
lA' sweep.
Rate
at
which sawtooth
rises
is
de~
termined by setting
of
Time-Base
A TIME/CM switch.
CAL
OUT
Supplies 1-
square-wave
TOR
switch.
kc squ
signal
is
are
controlled
-wave output.
by
Peak-to-peak
AMPLITUDE
value
of
CALIBRA-
POWER
ON
Applies power to· the instrument.
585A-'
6
.\
Position Indicators
BEAM-POSITION INDICATORS
If
beam
is
positioned horizontally
or
vertically
away
from
center
of
graticule, either
on
or
off
screen, appropriate
beam-position indicator lamp lights.
Rear-Panel Connectors
EXTERNAL
CRT
CATHODE
EXTERNAL
CRT
CATHODE binding post should remain
jumpered
to
the
GND
binding post unless external signal
is
being fed
in
for
beam-intensity modulation.
OSCILLOSCOPE/PLUG-IN COMBINATIONS
Compatible
Plug-Ins
Any 80-Series numbered plug-in
will
fit the 580A-Series
oscilloscope di rectly. If it
is
desired to
use
one
of
the Letter-
Series
or
One-Series plug-ins, the Type
81
Adapter
Plug-in
must
also be
used
to
adapt
the sele'cted plug-in to the
05-
ci
Iloscope.
585A-l
7
Oscilloscopel
Plug-In Characteristics
=-
PI u9-IBn
Type
J===~B==a==n==d==p==a==s==s~===:========R==i==se====T==i==m==e========-
I
de
to
20
me
18
nsec
CA
de to
24
me
I
15
nsec
G
de to
20
me
de
to
15
me
de to 30
me
de
to-
30
me
de to
20
me
de to
25
me
de to
95
me
I
\
I
\
I
I
I
18
nsec
23
nsec
12
nsec
12
nsec
17
nsec
14
nsec
3.9 nsec
H
K
L .
M
0
80
82
de to
85
me
4 nsec
86
de to
85
me
4 nsec
PROBE
INFORMATION
Probe Compensation
The
following brief procedure describes probe co·mpensa-
tion
for
'the
P80,
P6006,
and
P6008
probes.
For
more de-
tailed compensating procedures refer to the manual accom-
panying the probe.
8
585A-'
....
-
--
)
.-
-.
l
---
-
~'
-
...... " .. I ..
~
,··---,-M··
..
....
~.)
·H~-
,
i..
. ",-
P80
(CF
probe-used
with Type
80
Plug-In only)
1.
Terminate the OUTPUT
of
a Type 105
in
50
ohms.
Set
the Frequency
of
the Type
105
at
25
kc.
Adjust the com-
pensation
of
the Type
P80
for a flat-topped square wave.
2.
To adjust the
X10
or
X100
standards for the
P80
Probe,
carry out step 1
of
this procedure. Next, put the
2:1
At-
tenuator Head
on
the probe. Reconnect to the Type
105
as
in
step
1.
Adjust the attenuator head compensation for
best response to the square wave.
Remove
the 2:1 Attenuator Head.
Put
on
the Standardized
Head to
be
calibrated. Connect the 2:1 Attenuator Head
in
front of the Standardized Head. Reconnect to the Type
105
without the
50
n termination.
Adjust both
compensa1"ions
in
the Standardized Head for
the best response to the square wave.
P6006 and P6008
(Passive
probes)
1.
Set
the oscilloscope calibrator for an output of suitable
amplitude.
2.
Hold the probe body and tip assen,bly and loosen the
locking sleeve several turns.
3.
Touch the probe tip to the oscilloscope calibrator out-
put connector.
4.
Set
the sweep rate to display several cycles
of
the cali-
brator output signal.
585A-l
9
".
--,'
."
..
-
,"
.....
-
...
-.,.
-
-"_.-._-_._-
-_.~
S.
Hold the base bushing
and
turn the probe body and tip
assembly to obtain
an
undistorted
presenta1"ion
of
the cali-
brator output signal.
6.
Hold the probe body
and
tip assembly and carefully
hand-tighten the locking
sleeve.
NOTE
To
obtain
accurate
displays
it
is
necessary
to
check
the
compensation
of
the
probe
before
each use.
Probe
Input
Capacitance
P80
(All
attenuators
are
external)
Input
Atten
uation
Ca
pacita
nce
Xl
10
pf
X2
7.8
pf
XS
3.3
pf.
X10
2
pf
1.4
pf
3.7
pf
1.4
pf
X20
XSO
X100
Input
DC
Resistance
200
k
SOOk
1 Megohm
I
2 Megohms
I
I
5 Megohms
I
10
Megohms
585A-l
10
P6006
and
P6008
(Build-in
attenuation)
Probe
Attenu-
ation
Input
Co
pacita
nce
Input
DC
Resistance
P6006
X10
17
pf
with
20
pf plug-in
10
Megohms
,
9.5
pf
with
47
pf
plug-in
P6008
X10
17
pf
with
15
pf
plug-in
10
Megohms
TRIGGERING INFORMATION
NOTE
The
triggering
of
Time Base B is
the
same as
that
for
Time Base
A.
The
number
of
triggering
modes
and
'the
amount
of
display
amplitude
needed
are
the
only
differences.
Triggering Requirements
for
Time-Base B
Frequency
Internal
External
AC
and
DC
AC
AC
LF
REJECT
15 eps to 15
ke
4mm
.2
v
15
ke
to 1
me
1
me
to 5
me
4mm
1
em
4mm
1
em
.5
v
1.5
v
585A-'
11
Internal Triggering
The
three INT positions
of
the TRIGGERING
SOURCE
switch
allow
triggering from the displayed· waveform.
This
is
the most convenient mode
of
operation since no external
triggering connections are required.
To
trigger
a displayed waveform using one
of
the INT
positions
of
the TRIGGERING
SOURCE
switch,
set
the
os-
ci Iloscope controls
as
follows:
STABILITY
PRESET
TRIGGERING
LEVEL
Full left
or
right
TRIGGER
SLOPE
+
or-
TRIGGERING SOURCE
INT - AC
for
normal trig-
triggering requirements
to
150
mc.
AC
LF
REJECT
to sup-
press
low-frequency
components
that
may
cause jitter
or
otherwise
mistrigger the desired
waveform.
HF
SYNC
for
wave-
forms
above 5 mc
of
in-
sufficient amplitude
for
normal jitter-free triging. Minimum deflection needed: 4
mm.
585A-l
12
iJ
<
J
.
.
i
/
j
~
:'
~
u
For
internal triggering
in
INT
AC
or
AC
LF
REJECT,
cer-
tain
minimum
'crt
deflection
requirements
must
be
met
by
the
displayed signal.
These
are:
frequencies
up
to
5
mc,
2
mm;
5 to
10
mc, 4mm;
10
to
50
mc, 1cm;
50
to
100
mc,
2
cm;
and
100
to
150
mc, 3 cm.
HcJilZONT
AL
DISPLAY
INTERNAL
SWEEP
TIME/CM
Desi
red
sweep
rate
VARIABLE
(TIME/CM)
CALIBRATED
Turn
the
TRIGGERING
LEVEL
toward
the
0
mark
until
a stable display
is
obtained.
Line
Triggering
The
LINE
position allows
the
displayed waveform
to
be
triggered
from
the
power line frequency
(as
in
,the
case
when
observing a waveform
which
has
a
time
relationship
to
the
power-line
frequency).
Set
the
controls
as
follows:
STABILITY
PRESET
TRIGGERING
LEVEL
Full
left or right
TRIGGER
SLOPE
+ or -
TRIGGERING
SOURCE
LINE
HORIZONTAL
DISPLAY
INTERNAL
SWEEP
TIME/CM
Desired
sweep
rate
VARIABLE
(TIME/CM)
CALIBRATED
Turn
the
TRIGGERING
LEVEL
toward
the
0
mark
until a
stable display
is
obtained.
585A-l
13
External Triggering
This
mode
is
convenient for observing the shaping and
amplification
of
a signal by each stage
of
a circuit without
resetting the triggering controls for each observation.
The
external triggering waveform
used
to trigger the sweep
must
bear a time relationship to
'the
displayed waveform.
To
trigger a displayed waveform using one
of
the
EXT
positions
of
the TRIGGERING SOU
RCE
switch,
set
the
os-
cilloscope controls
as
follows:
STABILITY
PRESET
TRIGGERING
LEVEL
Full left or right
TRIGGER
SLOPE
+ or -
TRIGGERING
SOURCE
EXT
-
AC
for normal trig-
gering requirements to
150
mc.
DC
if
,the
triggering
waveform frequency
is
below
15
cycles. Mini-
mum
amplitude need-
ed:
DC
to
15
kc-.2
v,
15
kc
to
10
mc-.3
v,
10
mc
to
50
me-.S
v,
50
mc
to
100
mc-l.5
v,
100
mc
to 150
mc-2
v.
585A-l
14
..lij
...
"....,'
.
,
'i,
j
.
-~
Z._,_
j'
t
...
J
HF
SYNC
for wave-
forms
above 5
mc
of
in-
sufficient amplitude for
normal jitter-free triggering. Minimum
am-
plitude needed:
15
kc
to
150
mc-.1
v.
HORIZONTAL
DISPLAY
INTERNAL
SWEEP
TIME/CM Desired
sweep
rate
VARIABLE
(TIME/CM)
CALIBRATED
Connect
the
external triggering waveform to
the
TRIG-
GER
INPUT
connector, and turn
the
TRIGGERING
LEVEL
control toward
the
0 mark until a stable display
is
obtained.
Selection of the Triggering Slope
The
horizontal
sweep
can
be
triggered
on
either
the
ris-
ing
(+
slope)
or falling
(-
slope)
portion of
the
trigger-
ing waveform.
This
is
determined by
the
position of
the
TRIGGER
SLOPE
switch. When
the
switch
is
in
the
+
posi-
tion,
the
sweep
is
'triggered
on
the
rising portion of
the
trig-
gering waveform; when
the
TRIGGER
SLOPE
switch
is
in
the
- position,
the
sweep
is
triggered
on
the falling por-
tion of
the
waveform
(see
Figure
1).
585A-l
15
TRIGGERING
-
TRIGGER
SL~PE
t=
Sweep U
triggers
TRIGGER
SL~PEn
Sweep
t5ii
triggers
on - slope
TRIGGERING
LEVEL
control
causes
waveform
to trigger
below
the zero
voltage point.
Effect with
TRIGGERING
LEVEL
control
set
in - region
TRIGGERING
LEVEL
control
causes
waveform to trigger above
the zero voltage point.
Effect
with
TRIGGERING
LEVEL
control set in + region
Fig. 1. Effects
of
the TRIGGERING
LEVEL
and
TRIGGER
SLOPE
controls.
585A-l
16
~
_
~
.•....
1
....
-!
L~__
,
..
I .
NOTE
When
displaying
waveforms
above
50
mc,
the
trigger
circuit
may
produce
a
stable
display
on
on
Iy
one
slope.
Be
sure
to
try
both
+
and
-
positions
of
the
TRIGGER
SLOPE
switch
for
best
triggering.
Using the
STABILITY
and
TRIGGERING
LEVEL
Controls
In
virtually
every triggering
application,
satisfactory op-
eratio·n can be obtained with the
ST
ABI
L1TY
control in the
fully
counterclockwise,
PRESET,
position. This setting has
the
advantage
that
no further adjustment
of
the STABILITY
control
is
required when you are switching from one trig-
gering signal to another. However,
if
it
becomes
difficult
for
you
to
obtain
stable
triggering
with the STABILITY con-
trol
at
PRESET,
it
will
be necessary
for
you to adjust the
control
for
proper
triggering.
'.
To adjust the STABILITY control, pla'ce the TRIGGERING
LEVEL
control in the
fully
counterclockwise position. Then
rotate the
ST
ABI
L1TY
control slo·wly clockwise until a trace
appears on the screen. The correct setting
is
obtained
by
rotating the control counterclockwise three to five degrees
past the
point
where the trace disappears.
585A-l
17
••••••
__
---\
FREE-RUNNING
SWEEP
OUTPUT
OF
THE
EXTERNAL
EQUIPMENT
IS
APPLIED
TO
THE
OSCILLOSCOPE
INPUT.
EQUIPMENT
TO
BE
TRIG-
GERED
OR
SYNCHRONIZED
BY
THE
OSCILLOSCOPE.
Fig.
2.
Using
the
Gate
or
Sawtooth
output
waveforms
to
syn-
chronize
or
trigger
external
equipment.·
18
585A-l
;
~
.
~
,-
-i;
The
TRIGGERING
LEVEL
contro·1
determines the point
on
the triggering waveform where triggering
o'ccurs.
Rotating
the control clockwise
causes
the sweep to trigger at more
positive points
on
the waveform while rotating the control
counterclockwise
causes
the sweep to trigger
at
more nega-
tive
po·ints.
Setting the TRIGGERING
LEVEL
at
0 will
cause
the sweep to start
at
approximately the average-voltage
point
of
the waveform.
Free-Runni~g
Sweep
In
the usual oscilloscope application, the sweep
is
trig-
gered
or
synchronized
by
the input waveform. However,
in
some
applications it may be more desirable to reverse
the process and initiate the input waveform through
use
of
a periodically recurrent waveform from the oscilloscope.
In
this type
of
applicatio,n the sweep
is
caused to free-run
and an output from either the
+GATE
OUT
(A and
B)
or
SAWTOOTH A (Time-Base A
on
Iy)
connectors
is
used
to
trigger or synchronize the input waveform.
The
sweep can be made to free
run
by
rotaing the
ST
A-
BILlT.Y
control fully clockwise. Under these condtions the
sweep
runs
at
a rate determined
by
the setting
of
the TIME/
C/-.it
controls.
In
this (application
it
is
advisable to place the
TRIGGER-
ING
SOURCE
switch
in
its
EXT-AC
position to prevent the
vertical signal from producing any possible interference or
jitter.
585A-l
19
I
SINGLE
SWEEP
OPERATION
I
General
I
The usual 'oscilloscope
display
formed
by
a repetitive
sweep
is
best
for
most applications. However,
in
applica-
tions where the displayed waveform
i~
not
repetitive
or
varies in amplitude, slope,
or
time interval, a
repet~1"ive
sweep produces a jumbled display.
When
observing a
waveform
of
this type, it
is
usually advantageous to
use
a
single sweep presentation.
The single sweep feature
is
selected
by
placing the HORI-
ZONTAL
DISPLAY switch in the
'A'
SINGLE
SWEEP
posi-
tion. The
RESET
button controls the
operation
o·f
the single
sweep.
Manual Operation
This type
of
operation
is
best used when
photographing
waveforms which are repeti'Hve but contain
too
much jitter.
Set the Time-Base A oS'cilloscope controls to:
STABILITY Full right
TRIGGERING
LEVEL
Full right
TRIGGER
SLOPE
+
TRIGGERING SOURCE EXT-AC
HORIZONTAL
DISPLAY
'A'
SINGLE-SWEEP
TIME/CM
Desired sweep rate
VARIABLE· (TIME/CM) CALI
BRATED
Each
time a sweep
is
desired, the
RESET
button
must·
be pressed.
585A-'
20
t .
1
~"-'
I
H
, r
~,',
i
-',
-,"
. -'
"
(I
N1
1
W
Triggered Operation
This
type
of
operation
is
used to photograph non-repeti-
tive waveforms.
Set
the Time-Base A oscilloscope controls to:
TRIGGERING SOURCE
INT-AC
For normal trig-
gering requirements to
150
mc.
AC
LF
REJECT
to
su
ppress low·fre-
quency
components
that may cause ;itter
or
otherwise mistrigger the
desired waveform.
HORIZONTAL DISPLAY A
TIME/CM
VA,RIABLE
(TIME/CM)
Desired sweep
CALIBRATED
rate
Obtain
a waveform
of
about
the same amplitude and
frequency
as
that
of
the expected waveform. Adjust the
Time-Base A STABILITY TRIGGERING
LEVEL
and
TRIGGER
SLOPE
controls
for
a stable display
of
the substitute waveform. Disconnect the substitute waveform and connect the
expe'cted waveform
to
the osci IIoscope. Set the HORI.
ZONTAL
DISPLAY to
'A'
SINGLE
SWEEP.
Reset
the single
sweep circuitry
of
the oscilJoscope
by
pressing the
RESET
button.
The
oscilloscope
will
now
sweep once when the expected
waveform arrives. It
will
then not sweep again until the
RESET
button
is
once
again
pressed.
585A-
1
21
-~---.-_._---------------~._--
--.-
-
..
- _._-.--
DELAYED
OPERATION
Delayed Sweep Time Calculation
The amount
of
delay
occurring
after
the
application
of
the
triggering
waveform
un1"il
the sweep
is
permitted to run,
is
indicated
directly
by
the settings
of
the
TIME/CM
OR
DELAY TIME control and the DELAY-
TI/v\E
MULTI
PLI
ER
1-10
control. The seUings
of
the
two
controls are multiplied to-
gether to
obtain
the actual
delay
time. For example,
if
the
TIME/CM
OR DELAY TIME switch
is
set
at 1 mSEC
and
the vernier
dial
of
the DELAY-TIME MULTIPLIER
1-10
control
indicates 6.75, the
delay
time
is
6.75 milliseconds.
When
this time
delay
has
elapsed, one
of
two
events
will
occur
depending upon the setting
of
the Time
Base
A STABILITY
control.
1• Non-Triggered Operation
If the
ST
ABI
L1TY
control
is
fully
clockwise, the horizontal
sweep
will
occur
immediately
at
the end
of
the
delay
period.
This
is
the mode
of
operation
most commonly used because
it
allows
obtaining
calibrated,
continuously
variable
delay
ti
meso
2.
Triggered Operation
If the Time Base
is
adjusted
for
normal
triggered
opera-
tion, the horizontal sweep does not start
at
the end
of
the
delay
period
but
waits until a
triggering
signal
is
received
by
the Time-Base A Trigger Circuit. In this mode
of
opera-
tion, the
delay
in presentation
of
the horizontal sweep
is
585A-
1
22
"I
!!!Ij
I }
not continuously
variable
but
is
dependent on both the
set-
ting
of
the
delay
,time
controls and the occurrence
of
the
triggering signal.
Determining Delayed Portion
When
the HORIZONTAL
DISPLAY
switch
is
placed in the
'B'
INTENSIFIED
BY
lA' position, you can obtain a normal
sweep presentation using Time
Base
B.
If
all
other controls
are
set
for
delayed sweep operation and the Time
Base
A
TIME/ CM switch
is
set
for
a faster sweep rate than the
Time
Base
B TIME/CM OR DELAY TIME control, a portion
of
the sweep
will
be brightened.
The
start
of
the brightened
portion indicates the start
of
the delayed sweep duration.
The
start
of
the brightened portion can be posilioned left
or
right with the DELAY-TIME
Iv\U
LTIPLIER
1-10 control.
The
length
of
the brightened portion can be adjusted with the
Time
Base
A TIME/CM control.
Expanding Delayed Portion
Place the HORIZONTAL
DISPLAY
switch
in
the
lA'
DLY'D
. I
I
!
.,
~
BY
IB'
position to expand the brightened portion
to
the
full width
of
the crt.
The
amount
of
magnification
is
the
ralio
of
the
Time
Base
B
TIME/CM
OR DELAY TIME control
setting to the Time
Base
A TI/V\E/CM control setting. For
example,
if
the
Time
Base
B TIME/eM
OR
DELAY
TIME
switch
is
(set
at
1
mSEC
and the Time
Base
A TIME/CM
585A-'
23
switch
is
set
at 1 /LSEC,
the brightened pori-ion
of
the sweep
is
magnified
horizontally
1,000 times. Using this method,
practical sweep magnificalions up to approximately"J
10
,OOO
times are attainable.
At
times when using the delayed sweep to obtain high
magnifica'tion, the trace may
appear
very dim because
of
low
duty cycle.
Delayed Trigger
A delayed triggering pulse can be obtained from the
front-panel
DLY'D
TRIG connector any
i-ime
from .05 micro-
seconds to
10
seconds after the start
of
a'
sweep. When
the oscilloscope
is
set
for
delayed sweep operation the
delayed ·trigger occurs
at
the start
of
the delayed sweep.
The delayed triggering pulse can be
used
to ini1'iate some
event after a known time interval, and when
used
with the
delayed sweep, permits observation
of
the resulting event.
MISCELLANEOUS
OPERATIONS
External Horiz'ontal Input
For special applications you can deflect the spot hori-
zontally
with some externally derived waveform.
This
al-
lows you
to
use
the oscillos'cope to
plot
one function versus
another.
585A-'
24
. .
Pii.,
.......
H
• ' j;
'.
<..
..
,
~
-~,
\
.,
, I
I .
'~'-.
-.-
',.
--
..~ --,--
--~
..
'ir~'
.,.,
-.~
'
--
-&r-- -----
f
.
----r-'
"
-,
"
11
"
1
.'
r
. '
",.
"'-,,'
."
h
-H
K.
...
_ .._
-.-•.
--.",&
To
use
an external horizontal input, connect the externally
derived waveform to the HORIZ INPUT connector and place
the HORIZONTAL DISPLAY switch
in
either
Xl
or
X10
EXT
position.
The
horizontal deflection factor
is
continuously
variable from
approximately
.2
to
approximately
15
volts
per centimeter with external horizontal VARIABLE
10-1
con-
trol and the HORIZONTAL
DISPLAY
switch.
Intensity Modulation
The
crt display
of
the Type 585A Os'cilloscope can be
intensity modulated
by
an external signal to display addi-
tional information. This
is
done
by
disconnecting the ground-
ing
bar
from the
EXTERNAL
CRT
CATHODE connector at the
rear
of
the instrument and connecting the external signal
to this terminal.
When
you wish to make very accurate time measurements from the crt display, you can intensity modulate the
beam with time markers and make your measurements directly from the time markers presented on the screen. A
positive signal
of
approximately
25
volts
is
required to cut
off
the bean' from normal intensity. Restore the ground-
ing
bar
to the
EXTERNAL
CRT
CATHODE connector during
normal operation to
avoid
uneven trace intensity
at
high
sweep rates.
585A-l
25
Loading...