Tektronix 7A13 User manual

INSTRUCTION
MANUAL
Serial
Num ber
TEKTRONIX
CANADA
LTD
.
VANCOUVER
SERVICE
CENTRE
7A13
DIFFERENTIAL
COMPARATOR
SN
B040000 -
up
Tekt ronix , Inc.
 P.O. Box
500
Beaverton ,
Oregon
97005
 Phone : [phone]
 Cables : Tekt ronix
070-1113-00 1070

WARRANTY
All
Tekt ronix
inst rum ent s are
warrant ed against
defective
m at erials
and
workm anship for
one
year
.
Tekt ronix
t ransform ers ,
m anufact ured
in our
plant ,
are warrant ed for the life of the inst rum ent .
7
Any
questions with
respect to the
warrant y
,
m ent ioned
above
should be
taken
up
with
your
Tekt ronix Field
Engineer
or
Representative .
All requests for repairs and replacem ent parts
should be direct ed to the Tekt ronix Field Office or
representat ive in your area . This procedure will assure
you the fastest possible service . Please include the
inst rum ent Type ( or Part Num ber ) and Serial or
Model
Num ber with all
requests
for
parts or
service
.
Specifications and price change privileges reserved .
Copyright  1970 by Tekt ronix , Inc. , Beaverton ,
Oregon . Print ed in the Unit ed Stat es of Am erica . All
right s reserved .
Contents
of
this
publication m ay not
be reproduced in any form without perm ission of the
copyright owner .
U.S.A. and foreign Tekt ronix product s covered
by U.S. and
foreign patent s and
/ or patent s
pending .
1

7A13 (
SN
B040000 - up
)
DISPLAY TIME MULTIVIBRATOR
th :
257
TABLE OF CONTENTS
CR
SAK
RO
120X
SECTION 1 SPECIFICATION
C63
Cho
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8.2
KE
2
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Page
Q73
1-1
1-1
12
1-4
71-4
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Vom
HI
:
CO
BV
DB
20V
OOK
3 .
07
Introduction
Electrical
Characterist ics
System
Characterist ics
30
Environm ent al Characterist ics
it
SECTION
2
OPERATING INSTRUCTIONS
Introduction
Front
Panel
Description
55
Test Setup Chart
Fam ili ari zat ion Procedure
General Operat ing Inform at ion
SOOV
3035
4204
1254
Q83
De
30
TOR
OUT
TO 1.2.1
COUNTERS
2-1
2-1
13
2-2
2-4
PRINT
COMMAND
2-5
TO
MEMORIE
VOLINETER
17 1-1662
= 201
DRIVER
201
O.
Q26
PR
OKR63
084
sk
R25
22Y
SECTION 3
CIRCUIT DESCRIPTION
2.3 K
Introduction
Block
Diagram
Description
Detailed
Circuit
Description
3-1
3-1
3-2
SECTION 4
MAINTENANCE
Prevent ive Maintenance
Troubleshooting
STOR
MULT Vige
Correct ive Maintenance
4-1
4-2
4-7
SECTION
5
PERFORMANCE
CHECK / CALIBRATION
To
POO
5-1
5-1
D132
* 12
Introduction
Test Equipm ent Required
Short - Form Perform ance Check / Calibration
Procedure
and
Index
Perform ance
Check
/
Calibration
Procedure
2.OY
192
OK
R21
190
5-3
5-6
BA
20
Q125
o
0173
SECTION 6
ELECTRICAL PARTS LIST
RUL
BOK
RIZAL
ak
Abbreviations and Sym bols
Parts
Ordering
Inform at ion
16
TOBU
RS
22
RESOLUTION
SWITCH ANDGATE
SECTION
7 DIAGRAMS
AND
CIRCUIT BOARD
ILLUSTRATIONS
20
C12
DI
Q9
Sym bols and
Reference
Designat ors
Volt age
and
Waveform
Condit ions
3
MECHANICAL
PARTS LIST
SECTION
8
> 18
START
TO
STOP ZONE
ZG
Mechanical Parts
List
Inform at ion
Index of
Mechanical Parts
Illust rations
Mechanical
Parts List
Accessories
le 20
CI
CHANGE
INFORMATION
Q 163 KA
RICE
370164
Bok
0164
5.
CLOCK
OUT
at algas
Abbreviations
and
sym bols
used in this
m anual are
based on or
taken
direct ly
from
IEEE
Standard
260 "
Standard
Sym bols
for
Unit s " ,
MIL
-
STD - 12B and
ot her standards
of
the
elect ronics
industry .
Change
inf orm at ion , if any
, is
located at
the rear
of this
m anual
.
SEE PARTS
LISTEOR
SEMICONDUCTOR
TYPE
SERIES IM RODEL 112
i
A

.
AIN
00
USE
IN
1-50 m y
VAR IN ONLY
FINE
COMPARISON
VOLTAGE (
Vc )
I
VOLTS
2 :
0076
40 500
MAX
INPUT
VOLTS
AC
+ INPUT
VOLTS /
DIV
UNCAL
GND
VARIABLE
CAD
PULL VAR FOR
X10 Ve
OC
50 m V
20
1MS
20pF
Vc
5
10
5
AC
-
INPUT
2
5
GND
STEP ATTEN
BAL
GAIN
DC
1MS
20pF
Ve
X10 BAL
V
REZIDENT
POSITION
VAR BAL
BW
Ve OUT
0-10V
dit ulo
late
FULL
TEKTRONIX
SMH
DIFFERENTIAL
COMPARATOR
7A13
1
Fig . 1-1 . 7A13 Differenti al Com parat or .
7A13 (
SN
B040000
-
up )
A
.

7A13 ( SN
B040000
-
up )
SECTION 1
SPECIFICATION
Change inf orm at ion , if any , affecting this sect ion will be found at the rear of the m anual .
INTRODUCTION
TABLE 1-1 ( cont )
Characterist ic Perform ance
Requirem ent
The 7A13
Vertical
Plug - in
is a DC
coupled different ial
com parat or with excellent com m on - m ode reject ion and
m edium gain
charact eristi cs
for
m edium level
applicat ions
.
The 7A13 is designed for use in Tekt ronix 7000 series oscil
loscopes . It m ay be used as a different ial input pream pli fier
or conventional pream pli fier in addit ion to it s use as a com
parat or .
Com m on Mode
Signal Range
1 m V / Div to
50
m V
/
Div ;
X10 Vc In
At least +10 V and -10 V
At least +100 V and -100 V
10 m V / Div to
50 m V / Div ;
X10 Vc Out
In the
different ial input m ode ,
the
dynam i c range
allows
the applicat ion of com m on - m ode signals up to +10 or -10
volts to be applied to the unit without at t enuation .
Com m on - m ode reject ion ratio of at least 20,000 : 1 at DC to
100 kHz perm it s m easurem ents of different ial signals less
than 1 m V in am pli tude on 10 volt com m on - m ode signals .
0.1 V / Div to
0.5 V /
Div ;
X10 Vc
In
At least +500 V and --500 V
When used as a different ial com parat or , the 7A13 has an
effect ive offset range of 10,000 divisions .
0.1 V
/
Div
to
0.5
V
/
Div
;
X10 Vc Out
ELECTRICAL CHARACTERISTICS
1 V / Div to 5
V / Div At least
+500 V
and -500 V
X10 Vc In
The elect rical charact eristi cs described in Table 1-1 are
valid over the stat ed envi ronm ent al range of inst rum ent s
calibrated
at an
am bi ent
t em perat ure of +
20  C to
+ 30 
C
and aft er a 20 - m inut e warm up period unless ot herwise
noted .
Frequency
Response
( 8 Div
Reference )
FULL Bandwidt h
Upper
Li m it
See Table 1-2 , System Characteris
ti cs
10. Hz
or less
TABLE 1-1
AC ( Capacit ive )
Coupled Input
Lower Bandwidt h
Frequency
ELECTRICAL CHARACTERISTICS
Characterist ic
Perform ance
Requirem ent
5 MHz
Bandwidt h
DC to 5 MHz within 500 kHz
Deflection Factor
( VOLTS / DIV )
Calibrated
Range
1 m V / Div to 5
V / Div , 12
steps in a
1,2,5
sequence
Overdrive
Recovery
( 1X At tenuator at
1
m V /
Div )
1 us to recover within 1.5 m V and
0.1 m s to
recover within 0.5
m V
aft er the
rem oval of a
+10 V or
-10 V or
less
overdrive
signal
,
regardless
of
overdrive signal
dura
ti on .
Gain Rat io
Accuracy
Wit hin 1.5 % of
GAIN
adjust ed at 1
m V /
Div
See Fig .
1-2 .
Uncalibrated
(
Variable
)
Continuously variable : ext ends
deflect ion factor to at least 12.5
V / Div
Com m on
Mode
Reject ion
Rat io
1 m V / Div to
1-1

Specification
-
7A13 (
SN
B040000 - up
)
TABLE
1-1 ( cont
)
TABLE 1-1 ( cont
)
Characterist ic
Perform ance
Requirem ent
Characterist ic
R
and C
Product
Perform ance Requirem ent
Wit hin
1 %
for all
deflect ion
factor
sett ings .
50 m V / Div
X10 Vc In
DC to 100
kHz
At least
20,000 : 1 , 20 V P
- P or less
test signal
At least 10,000 : 1 , 10 V P - P or less
test
signal
100
kHz
to
1 MHz
Maxim um Gate
Current
 C to + 35  C
Both
Input s
+ 35  C
to +
50  C
Both
Input s
0.2 nA
or less
( 0.2 Div
at
1
m V / Div )
1 MHz to 10
MHz
CMRR
=
10,000 / frequency ( MHz )
2 nA or less
( 2 Div at 1 m V
/ Div )
20 MHz
At least 250 : 1 , 1 V P - P or less test
signal
10 m V / Div to
50 m V / Div ; X10
Vc
Out
;
DC Drift
Drift
Wit h Tim e
(
Am bi ent
Tem
perature
and
Line
Volt age
Constant
)
0.1 V / Div to 5
V /
Div ;
X10 Vc In or Out
Short
Term
DC to 10 kHz
AC
Coupled
at
60 Hz
At least
2,000
: 1
At least 500 : 1
1
m V P -
P or less
or 0.1 Div
or less
( whichever
is
great er )
any 1
m inut e
int erval
within
1
hour aft er
20
m in
ut es from turn - on .
Long
Term
Maxim um
Input
Volt age
DC (
Direct )
Coupled
DC + Peak
AC
1
m V /
Div
to
50 m V
/ Div ;
X10
Vc
In
1 m V P
- P or less
or 0.1
Div ( which
ever
is
great er
) during
any
hour
aft er the
first hour and
20
m inut es
from
turn -
on
.
40
VDC
,
40 V
Peak
AC
, 1
kHz or
less
Drift
Wit h
Am bi ent 2
m V
/ 10
 C
or
less ,
0.2
Div
/
10  C
Tem perat ure
(
Line (
whichever is
great er
)
Volt age
Constant
)
10 m V / Div to
50
m V
/
Div
;
X10 Vc
Out
400 VDC , 400 V Peak AC , 1 kHz
or
less
0.1 V / Div to
0.5 V /
Div ;
X10 Vc In
Am pli fier
Crosst alk 1 % or
less shift within
20 ns of step
of fast rise squarewave when
switchi ng
undriven
input from
GND to AC or DC
0.1 V / Div
to
0.5 V /
Div ;
X10 Vc Out
500 VDC . 500 V Peak AC , 1 kHz
or
less
Displayed Noise
( Tan- 400
UV or
less at 1 m V
/ Div in
gent ially
Measured )
Type 7700 -
Series or
7500 -
Series
indicat or
oscilloscope
1 V / Div to 5
V /
Div
;
X10 Vc In
500 VDC
AC (
Capacit ive )
Coupled
Input
Com pari son
Volt age
Range
O V to +10 V
Accuracy
+ ( 0.1 % of
sett ing
+5
m V )
Input
R
and C
Resistance
1 M12 within 0.15 %
Electrical Zero
0.5 m V or less
Capacit ance
20 pF within 0.4 pF at 1 MHz
Vc OUT Resistance 15 k 12 within 5 k 12
1-2
B

 
CMRR
VOLTS
P
-
P
100K
:
1
10K
:
1
Fig
.
1-2
.
Com m on
m ode
reject ion
ratio
graph . It
pertains
to
1
m V /
Div
through
20
m V /
Div
deflect ion
factors
.
1,000
:
1
10
Com m on
Mode
Reject ion
Rat io
Perform ance
Curves
CMRR
Perform ance
Requirem ent
P
-
P
Am pli tude
of
Sinusoidal
Test
Signal
Verificat ion
Point s
100
:
1
DC
10
kHz
100
kHz
1
MHz
10
MHZ
20
MHZ
Specification
-
7A13 ( SN
B040000 - up
)
Frequency
1-3

Specification
-
7A13 ( SN
B040000 - up
)
SYSTEM CHARACTERISTICS
The system charact eristi cs list ed in Table 1-2 are to
specify
the
perform ance of the
plug - in
with
various com
binat ions of
probes and in
various
indicat or
oscilloscopes .
EXTernal CALibrator ,  C to 50  C : The plug - in GAIN is set ( within
10  C of the operating t em perat ure ) using an ext ernal calibrator
signal whose accuracy is within 0.25 % .
* INTernal Calibrator , 15  C to 35  C : The plug - in GAIN is set using
the oscilloscope’s own calibrator and the inst rum ent is operating
within the +
15  C to
+ 35 
C
range .
* INTernal Calibrator ,  C to 50  C : The plug - in GAIN is set ( within
10  C of the operating t em perat ure ) using the oscilloscope’s own
calibrator , and the inst rum ent is operating within the  C to + 50  C
range .
TABLE 1-2
SYSTEM
CHARACTERISTICS
ENVIRONMENTAL CHARACTERISTICS
Probe
Indicator
Oscilloscope
BW
TE
( MHz ) | Ins )
Accuracy ( %
)
Sig
Out
2
EXT
3INT
4INT
BW
TE
CAL CAL
CAL ( MHz ) | Ins )
1.5 2.5
3.5
55
6.4
1.5
2.5
3.5
55
6.4
TABLE
1-3
7A13
test ed
alone (
separat e
from
indicat or
oscilloscope )
)
7500 Series
4.7
75
75
4.7
Characterist ic
Inform at ion
None
P6053
P6048
None
P6053
P6048
7700 Series 100
1.5
3.5
3.5
 
 
2.5
2.5
3.5
3.5
55
55
6.4
6.4
100 1.5
Alt itude
Non
-
Operat ing
Transportat ion
Accuracy
percentages
apply to all
deflect ion
factors .
Plug
- in
GAIN
m ust be set
at the
deflect ion factor
designat ed
at the
applicable
posit ion
of the
VOLTS /
DIV
switch .
When a
probe is
used , the
GAIN
m ust be set
with the
calibration signal
applied to the probe
ti p .
To
50,000
feet
and
-55  C
Qualified under
Nat ional
Safe
Transit
Com m it t ee
test
procedure
1A ,
Cat egory 11
1
1-4
( 

7A13 (
SN
B040000 -
up )
SECTION 2
OPERATING INSTRUCTIONS
Change inf orm at ion , if any , affecting this sect ion will be found at the rear of the m anual .
INTRODUCTION
tween 1 and 50 m V , VARIABLE
knob is pushed in and 1x probe is
used .
This sect ion opens with a brief functional descript ion of
the front panel cont rols and connect ors ( see Fig . 2-1 ) .
Following the front - panel descript ion is a fam iliarizati on
procedure and finally a general discussion of the operation
of the 7A13 .
NOTE
FRONT - PANEL DESCRIPTION
Wit h VOLTS /
DIV switch set
from .1 V to 5 V ,
lam p
rem ai ns on but input im pedance is 21 M32 and the
input
at t enuator is
uncom pensat ed .
Rin
zo
1-50 m V
VAR IN ONLY
Lam p
Illum inates
when
switch S10 ,
lo
cat ed on
left side of
plug - in , is
turned cw . This indicat es a + IN
PUT and
INPUT
im pedance
of
approxim at ely
infinit y
whenever
the VOLTS / DIV switch is set be
Select s
polarit y of
com parison
voltage .
COMPARISON
VOLTAGE
(
Vc )
+
and
-
Pushbut tons
RINO
USE IN
1-50 m V
VAR IN ONLY
FINE
COMPARISON
VOLTAGE
IVc )
VOLTS
20.76
40
400 500
MAX INPUT
VOLTS
AC
+ INPUT
VOLTS /
DIV
UNCA
GND
CARA
PULL
VAR
FOR
XIO Ve
DC
Rin
Switch
S10
IMA 20pF
AC
INPUT
GND
GAIN
STEP ATTEN
BAL
IMN
20pF
X10 BAL
***
POSITION
VAR
BAL
BW
Ve
OUT 0-10V
F
TE
ONIX
501
,
DIFFERENTIAL
COMPARATOR
7A13
Fig . 2-1 .
Front
panel of
7A13 and
location of Rin
switch S10
.
 
2-1

Operat ing
Instruct ions -
7A13 ( SN
B040000
- up
)
COMPARISON
VOLTAGE ( Vc )
Count er
-INPUT Mode
Switch
Select s
AC ,
DC ,
GND or
Vc
Mode
of
coupling
for
the
-INPUT
chan
nel .
Reads out the equivalent voltage
select ed
by
the
COMPARISON
VOLTAGE ( Vc
) select or switch
in
conj unction
with
FINE ,
VOLTS
/
DIV and
PULL
VAR
for X10
Vc
cont rols
.
STEP ATTEN BAL
Adjust m ent
Adjust s for
no vert ical trace
m ove
m ent
as the
VOLTS
/
DIV
switch
sett ing
is
varied
from 10
to
50
m V
/
DIV .
COMPARISON
VOLTAGE (
Vc
)
Select or
Switch
Select s one
of ten voltage
ranges
from zero to ten volts .
GAIN
Adjust m ent
COMPARISON
VOLTAGE
( Vc
)
FINE Control
Adjust s
the
am pli fier
gain for
dis
play of four divisions upon receipt
of a 4 -
m V
signal when
the
VOLTS /
DIV switch
is set to 1 m V
and the
VARIABLE cont rol is set to CAL .
Select s
a
com parison
voltage som e
where between the lower and upper
li m it s of the select ed band above .
X10 BAL
Adjust m ent
Adjust s for no vert ical trace m ove
m ent as
VARIABLE (
VOLTS / DIV )
knob is
pulled
out
.
+ INPUT
Connector
Provides a m eans of connect ion for
signal
m easurem ent
. It also
cont ains
a third
cont act for probe
at t en
uation
inf orm at ion . This enables
proper
readout
of
deflect ion
factor
on
CRT
screen .
VAR BAL
Control
Adjust s for no vert ical trace m ove
m ent as
VARIABLE (
VOLTS / DIV )
knob is varied throughout it s
range .
+ INPUT Mode
Switch
Select s AC , DC , GND or Vc Mode
of
coupling for
the +
INPUT
chan
nel .
Release
Latch
Pull to withdraw plug - in from in
dicator
oscilloscope .
VOLTS / DIV
Switch
Select s one of twelve volts per divi
sion calibrated deflect ion factors .
BW
Switch
Select s
eit her the
FULL
bandwidth
or 5 MHz .
VOLTS / DIV
VARIABLE Control
Vc OUT 0-10 V Jack
Provides a convenience outlet for
the com parison voltage .
Select s an
uncalibrated
deflect ion
factor som ewhere between the
twelve
sett ings above . A
m ini m um
of 2.5 t im es the VOLTS / DIV
switch sett ing is
provided . The
UN
CAL lam p lights when the
VARIABLE cont rol is out of the
CAL detent .
POSITION Control Posit ions display vert ically on the
CRT face .
Vc REF - IDENT
Pushbut ton
Internally disconnects bot h signals
and applies Vc to bot h inputs .
Readout display is replaced by the
word "
IDENTIFY " .
PULL VAR
FOR
X10 Vc Switch
Select s a Vc range 10X that which
is
select ed by
the
VOLTS / DIV
Switch . This only occurs for 10 , 20 ,
and 50 m V / DIV and .1 , .2 and .5
V / DIV sett ings of the VOLTS / DIV
switch .
TEST SETUP CHART
-INPUT
Connector
Sam e
as
for +
INPUT
connect or
above .
Fig . 2-2 shows a drawing of the front panel cont rols and
connect ors . This chart can be reproduced and used as a test
setup record for special m easurem ents and applicat ions , or
it m ay be used as a training aid for operation of the 7A13 .
2-2
A