Tektronix 585A User manual

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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 IB
I
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 amplifier
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 directly. 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
4nsec
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-
ciIloscope 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 trig-
ing. Minimum deflec-
tion 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, 4 mm; 10 to 50 mc, 1 cm; 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 trig-
gering. 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 wave-
form 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