Tektronix 7A13 User manual

1 Ν ST F t U
CT10
Ν
ΜΑΝ U A L
Te k t r onix, Inc .
7 Α
13
A MPL I F I ER
. r te

S . W . M illi k an W ay " Ρ . Ο . Box 500 "
B eaverto n , Oregon 97005 " Ph
one 644-0161
"
Ca b les : Te k tronix
ι
Serial
Number
4/o - ~- , -'
070-0978-00

1069

WARRANTY
All
Tektronix
instruments are
warranted
against
defective materials and
workman-
ship
for one year . 7i ktronix
transformers,
manufactured in our plant,
are warranted
for the life of the
instrument .
Any questions
with respect to the war-
ranty mentioned
above should be taken
up
with
your Tektronix Field Engineer .
Tektronix
repair and replacement-part
service
is geared directly to the
field,
therefore
all requests for repairs and
re-
placement
parts should be
directed to the
Tektronix
Field Office or
representative
in
your area . This procedure
will assure
you the fastest possible
service . Please
include the instrument Type
and Serial or
Model Number with
all requests for parts
or service .
Specifications and price
change privi-
leges reserved .
Copyright '0' 1969
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 permis-
sion of the copyright
owner .

S E CTIO N 1
SPE CI
F
ICATIO N

P age

S E CTIO N 3 CI RCU IT D E
SCR I P TIO N

P age
Intro d u ctio n
1 -1

Introdu ction

3-1
E lectrical
C
h aracteristics

1-1

B loc k Diagram Descri p tion

3-1
Deflection F actor

1-1

In p u t Mode Switc hes

3-1
Commo n M ode Sign al R ange

1-1

In pu t Atten u ators

3-1
Differential Signal R ange

1-1

In pu t So u rce and E
mitter F ollowers

3-1
F re qu ency Resp onse

1-1

Differential
a
n
d Common M od e Signal Clam p s 3-1
Overd rive R ecovery

1-1

Differe n tial
Com
p
arator

3-1
Common
M ode R e j ection R atio

1-1

χ 1 an d
χ
10 Gai n -Switch ing Am p lifier

3-1
M axim u m In p
u t V oltage

1-2

χ 1 , χ 2
an
d Χ 5 Gain-Switc h i n g Am p lifier 3-1
In p
u t R an d C

1-2

Driver Am p
lifier

3-1
M axim u m GateC u rrent

1-2
DC Drift

1_2

O u t pu t Am p lifier

3-1
Disp laye dN
oise

1-2

Trigger Am p lifier

3-1
Com parison
V oltage

1-2

F ee d bac k L imiter

3-3
System C h a r acteristics

1-2

R eado u t Logic

3-3
E
nviro n mental C h aracteristics

1-2

V c Decimal L am p Driver

3-3
Altit ude

1-2

Detailed Circ u it Descrip tio n
3-3
Tra n s portation

1-2

In p u t M ode Switc
h 3-3
In p u t Atten uators

3-3
S E CTIO N 2
O
PER
ATI N G I N ST RU CTIO N
S

In p u t So u rce
and E mitter F ollowers

3-3
Intro
du ction

2-1

Differe ntial
Sig n al an d Common M ode Signal 3-4
F
ront-
P anel Descrip tion

2-1

Clam p
s
Test Set u p C h art

2-1

Differential
Com p arator

3-4
Familiarization P roce du
re

2-2

Χ 1 and X10 Gain-Switc h ing Am p lifier

3-4
First-Time O peration

2-2

Χ 1, Χ 2 an d Χ 5 Gain-Switc hing
Am p lifier

3-5
F ront P an el A d
ju stments

2-3

Driver Am p lifier

3-5
Exam p
les of V oltage/Signal M eas u rements

2-3

O u t p u t Am p lifier

3-5
Single-en ded operation DC M eas u
rement

2-3

Trigger Am p lifier

3-5
Differential Com p arator
O p eration, DC

2-4

F ee d bac k L imiter

3-5
M eas u rement
R ea d ou t L ogic and V c
Decimal L am p Driver

3-5
Single-End
ed O peration, W aveform

2-4
M eas u
rement

L ow V oltage P
ower Su pp lies

3-5
Differential
Am p lifier O peration

2-4

Com parison
V oltage Ge nerators

3-5
Use of Vc O U T 0-10 V Ti pJ ac k
2-4
General
Disc u ssion

2-5

S E CTIO N 4 M AI N T
EN
A
N C E
Common M o d e R e j ection

2-6

P reventive M
aintenance

4-1
Am p lit u d e an d Commo n
M o d e R e j ection

2-9

General

4-1
Factors Wh ic h Affect
C MRR

2-9

Cleaning t he
F ron t P anel

4-1
Differential Am p lifier
A pp lications

2-11

Cleaning t he
Interior

4-1
Χ - Υ A p p
lications

2-11

V is u al Ins p ection

4-1
P
assive Signal Co u p ling M et h o d
s

2-11

Tra n
sistor C h ec k s

4-1
TA BLE OF
CO
N
T EN TS
Ty pe 7 Α 13

SE CTIO
N 5 PERF O RM A N
C
E
C HE CK /
CA L I BR ATIO
N
Type 7A13
TA
BLE O F CO N T EN
TS (Cont)
P age

P
age
Calibration

4-1

C
hec
k /Ad ju st Ste p Atten u ator
DC
B
alance 5-8
Corrective M aintenance

4-1

C h ec k /Ad ju st P osition Ce n ter

5-8
General

4-1

C h ec k /Ad ju st Trigger
DC
B
alance

5-9
Obtaining R
e p lacement P arts

4-1

C h ec k /Ad ju st Sig n al
O u
t p
u t DC L evel

5-9
Sp ecial P arts

4-2

C h ec k /A d ju st Trigger
O u t p ut DC L evel

5-9
Soldering Tech ni qu es

4-2

C h ec k /A d ju st Gain

5-9
Switc h
Rep lacement

4-4

C hec k Gate
C
u rrent

5-9
L
am pRe p lacement

4-5

P reliminary Com p arison V
oltage C h ec k &

5-10
T r
o u bles h ooting

4-5

T hermal Com p ensation
A d ju stment
Intro
du ction

4-5

C h ec k Com p arison V
oltage

5-10
C h ec k /Ad ju st
Common M ode Th ermal

5-10
General

4-5
Com p
ensation
In d icator Oscillosco
p e

4-5

I n p ut R
esistance & DC Atten u ation R atio

5-11
O p erating P
rocedu res a n d Control Settings
4-5

Ad
ju stments
Trou ble
Sym p toms

4-5

C h ec k /Ad ju st +In pu t 10 Χ
DC

5-11
Attenu ation R atio
V is u al Ins
p ection

4-6
C
h
ec k /A d ju st +I n pu t 1 Χ
DC
In pu t

5-12
Calibratio n
C
h
ec k
4-6

R esistance
Detaile
dTrou bles h ooting

4-6

C h ec k /Ad ju st +In pu t 100
Χ DC

5-13
General

4 - 6

Atten u ation R atio
Test E qu
i p ment R ecommende d
4-6

C h ec k /Ad ju st -In p ut
10 Χ DC

5-13
Atten u ation R atio
Tro
u bles h ooting by Direct R e p
laceme n t

4-6

Check/Adjust -I n p u t 1
Χ DC In pu t

5-14
Tro
u bles h ooting Aid s

4-6

R esistance
Tro
u bles h ooti n g Tech ni qu
es

4-7

H ig h -F re q uency
Com
p
ensatio n Ad ju stments

5-15
Com p onent C h ec k s

4-8

C h ec k /A d ju st H ig h - F
re q u ency

5-15
Instr
u ment R e p ac k aging

4-9

Com p ensation
Attenu ator Com p
ensation A d ju stments

5-20
C h ec k /Ad ju st +I npu
t Atten u ator

5-20
Com p ensation
C hec k /A d
ju st -I n p u t Atten u ator

5-23
Intro d u ction

5-1

Com p ensatio n
Test E q u i p ment R
equ ire d
5-1

Commo n
M ode Re j ection A d ju stments

5-25
Ge n eral

5-1

C
h
ec k /A d ju st Am p lifier H ig h - F
re qu ency

5-25
Test Equ i p
me n t

5-1

Commo n M od eRe j ection
S h ort- F orm
P erformance C h ec k
/Calibration

5-3

C h ec k /A d ju st Attenu ator
Common M o d e

5-27
P rocedu
re

R e j ection at 100 Hz
P
erformance C h ec k /Calibration
P rocedu re

5-5

C h ec k /Ad ju st Attenu
ator Common M ode

5-28
General

5-5

R e j ectio n at 10 kH z
P reliminary Proced u
re

5-6

Trigger & Signal Am p lifier
R es p onse C h ec k s 5-28
DC an d Gain A d ju stments

5-7

C h ec k Trigger Am p lifier
Gain an d Ste p 5-28
R es ponse
C h ec k /Ad ju st P osition
Center & DC B ala nce 5-7
C h ec k Trigger Am p
lifier H ig h -F re q uency

5-30
C h ec k /A d ju
st Χ 10 DCB alan ce

5-8

Si ne W ave R
es
ponse

TA
BLE O F CON T EN
TS (Cont)
P age

Page
Check Signal Am p lifier H ig h - F re qu ency

5-31

SE
CTIO N 6 ELE CT R
ICA
L
P A RTS L IST
R esp onse
Abbreviations
& Symbols
C h eck Signal Am p lifier 5-MHz B andwi d t h
5-31
Sine W ave R esp onse

P
arts Or d eri n g Information
Com p a r ison V oltage Ad ju stments

5-31
C h eck /Ad ju st 10- V olt Calibration

5-32

SE
CTIO N 7 DIAG R A M S A
N
D
ME CH A N ICA L
C h ec k /A d ju st 1- V olt Calibratio n
5-33

P A R TS I LLU STR ATIO
N S
C h ec k Com parison
V oltage L inearity

5-33

Diagrams
M ec h an
ical P arts Ill u strations
C h ec k V olts Co unter M
ech a
n
ical B ac k las h 5-33
C h ec k E lectrical Zero

5-34

SE CTIO N 8 ME
CH AN ICA L P A R TS L IST
N oise & Overdrive R
ecovery C h ec ks

5-34

M ec h
anical P arts L ist Information
C h ec k N oise

5-35

I n dex of M
echanical P arts Ill u st r atio n s
M ech a n ical P arts L ist
C heck Over d
rive R ecovery Time

5-36

Accessories
Ty pe 7 Α 13

Fig .
1-1
.
Type 7
Α 13
Differential Comparator
.

C h ange information, if any, affecting t h
is section
will
be fo un d at
t h e
rear of t h e man u al .
I N TR
OD
UCTIO N

C h aracte r istic
The Ty p
e 7
Α
13 V ertical Plug-In is α DC coup le d d iffere n tial
comparator wit h excelle n t commo n -mo de r e j ection a n d medi-
u m gain c h aracte r istics for me d i u m level applications . The
Type 7 Α 13 is desig ned fo r use in Te k t r onix 7000 se r ies oscillo-
sco p es . It may be u se d as αd iffe r en tial i n p u t p ream p lifier
o r conve n tio n al p ream p lifie r in ad d ition to its u se as α com-
pa r ator .
In t h e d ifferential in p u t mo d e, t h e dyn amic r ange allows
t he ap p licatio n of
common-mo
de
signals up to +10 o r -10
volts
to be app lie d to t h e u nit wit h ou t atte nu ation . Common-
mo de re j ection ratio of at least 20,000 :1 at DC to 100 kH z
p ermits meas u reme n ts of diffe r e n tial sig n als less t ha n 1 m V
in am p lit u d e on 10 volt commo n -mo de signals .
Wh en u se d as α differe n tial com p arator, t h e Ty p e 7 Α 13
h as an effective offset ra n ge of 10,000 d ivisio n s .
ELE CT R ICA L CH A R ACT ER ISTICS

F re q u ency R es p onse
T h e elect r ical c h a r acteristics desc r ibe d i n Table 1-1 are

(8 Div R eference)
valid over t he state d envi r onme
ntal r ange fo r i n
str
u me
n ts
calibrate d at an ambie n t tem pe
r at u re of +20° C to +30° C
a n d afte r α20-min u te
wa
r m
u p p erio d un less ot h e r wise noted .
C h aracteristic
Deflection F actor
( V O L TS/DI V )
Calib r ate d R ange
Gain R atio Acc u racy
Un calib r ated ( V a r i-
able)
Common
M ode Signal
Ran ge
1 mV /Div to
50 mV/ Div ;
Χ 10 V c Ιη
10 mV /Div to
50 mV/ Div ;
X10 V c O u t
0 .1 V /Div to
0 .5 V /Div ;
Χ 10 V c In
0 .1 V /Div to
0 .5 V /Div ;
Χ 10 V c O u t
TA BLE 1-1
ELE CT R ICA L C H A R ACT ER ISTICS
P erformance R e q u i r ement
1 m V /Div to 5 V /Div, 12 ste p s i n
α 1, 2, 5 se q u ence
W it h i n 1 .5% of GAI
N ad ju
ste d
at 1 mV /Div
Continuo
u
sly
variable : exte n d s
deflectio n factor to at least 12 .5
V /Div
At least +10V and -10V
At least +100V and -100V
At least +500V
and
-500V
SECTION I
SPECIFICATION
1 V /Div to 5 V /Div ;
Χ 10 V c Ιη
Differential Signal R ange
1 m V /Div to
50
mV/
Div ;
ΧΙΟ V
c In
10 m V /Div
to
50
m
V /Div
;
X10 V c O u t
0 .1 V /Div to
0 .5 V /Div ;
Χ 10 V c In
0 .1 V /Div to
0 .5 V /Div ;
X10
V c O u t
1
V /Div to 5V /Div ;
Χ 10 V c Ιη
FULL Ba n dwidt h
U pp e r L imit
AC (Cap acitive)
Co u p le d Inp u t
L ower B an dwidt h
F re qu ency
5
MH z B an dwidth
Over d rive R ecove r y
(IX Attenu ator at
1 m V /Div)
Commo n M o d e R e j ec-
tio n R atio
1 m V /Div to
50 m V /Div
X10 V c In'
DC to 100 kH z
100 kH z to 1 MHz
1 MHz to 10 MHz
20 MHz
10 m V /Div to
50 m V /Div ; Χ 10 V c
O u t ;
0 .1 V /Div to 5 V /Div ;
Χ 10 V c In or Out
DC to 10 kH z
P erforma nce Req u ireme n t
At least -1--500 V a n d

-500 V
At least 0 .8 V
At least
8 V
At least 80 V
10 Hz o r less
See F ig . 1-2 .
At least 2,000 :1
AC Co u p led at 60 Hz I At least 500 :1
Ty pe 7 Α 13
See Table
1-2,
System
C h aracte r is-
tics
DC to
5 MH z wit h in 500 kH z
1 μS

to

recover

wit h in

1 .5
m V ,
0 .1 ms to recove r wit h in 0 .5
m
V,
followi n g r emoval of a +10V or
-10V over d rive signal .
At least 20,000 :1, 20 V Ρ - Ρor less
test sig n al
At
least 10,000
:1,
10V
Ρ - Ρ or less
test signal
C
MRR = 10,000/f r eq u en cy (MHz)
At least 250 :1, 1 V Ρ - Ρo r less test
signal

Specification-Type 7 Α 13
C h aracteristic
Maxim u m I n p u t V oltage
DC
(Direct) Co u ple d
DC - Ι - P ea k AC
1 m V /Div to
50 m V /Div ;
Χ 10 V cΙη
10 m V /Div to
50 m V /Div ;
X10 VC O u t
0 .1 V /Div to
0 .5 V /Div ;
Χ 10 V c In
0 .1 V /Div to
0 .5 V /Div
;
X10 V c O u t
1 V /Div to 5 V /Div ;
Χ 10 V cΙη
AC (Ca p acitive) Co u p -
le d In p u t
I npu t R and C
R esista n ce
Ca p acitance
R an d C Pr od u ct
Maxim u m Gate
C
u rrent
0°Cto+35°C
B ot h Inpu
ts
+35 0 C to +50 0 C
B ot h I npu ts
DC D r ift
Drift W it h Time (Am-
bie n t Tem p erat ur e
an dL ine
V
oltage Co n -
stant)
Sho
r t Term
L ong Term
TA BLE 1-1

C h aracte r istic
ELE CT R ICA L CH A R ACT ER ISTICS (cont)
D r ift W it h Ambie n t
Temp e r at u re ( L ine V ol-
tage Consta n t)
Am p lifier Crosstal k
P erformance R e q u irement
40 V DC . 40 V P ea k AC, 1 kH z or
less
400 V DC . 400 V P ea k AC, 1 kH z
or less
500 V DC . 500
V
P ea k AC, 1 kH z
o
rless
500 V DC
7500 Se
r
ies

None

75

4 .7

1
.5

2 .5

3 .5

55

6 .4
1 ΜΩ within 0 .15%

Ρ 6053

75

4
.7

1
.5

2 .5

3 .5

55

6 .4
Ρ 6048
7700 Se r ies

N 6 n e

100

3 .5

1
.5

2
.5

3
.5

55

6 .4
Ρ 6053 100 3 .5 1
.5 2 .5 3 .5 55 6 .4
f or se t t i n gs .

Ρ 6ο48
W
it h in 1 % for all d eflection fac-
1 m V Ρ - Ρ or less o r 0 .1 Div o r less
(w h ic h ever is greater) any 1 minu te
i n terval with i n 1 h ou r afte r 20 min-
u tes from turn-on .
1 m V Ρ - Ρor less o r 0 .1 Div (w h ic h -
ever is g r eate r ) d u ring any h ou r
after
t h
e
first h ou r an d 20 min-
u tes
from
turn-on .
2 m V /10° C or less, 0 .2 Div/10°
C
(wh ic h ever is greater)
1 % o r less s h ift wit h in 20 ns of
ste p of fast rise s q u a r ewave w h en
switc h i ng u nd r iven i np u t from
G N D to AC o r DC
Dis played N oise (Tan-
gentially M eas u red)
Com par ison Voltage
R ange
Acc ur acy
E lect r ical Ze r o
V c O U T R esistance
C
h aracteristic
Altit
ud e
Non-Operating
Transpo r tation
P erformance R equ irement
400 μV o r less at 1 m V /Div i n
Type 7700-Series or 7500-Se r ies
in d icator oscillosco pe
OV to -4-10V
±

0 .1
%
ο

setti n g
+5
m V )
0 .5 m V or less
15 k Ω wit h i n 5 k Ω
SYST EM C H A R ACT ER ISTICS
T
h esystem ch
a r acte r istics liste d in Table 1-2 a r e to s p ecify
t h epe r fo r ma n
ce of
t he pl u g-in wit h va r io u s combinatio n s of
probes a n d in vario u s in d icator oscillosco p es .
TA BLE 1-2
SYST EM CH A R ACT ER ISTICS
In d icato r I Pr o b e Ι BW Ι Τ , Ι

'Acc u racy W

Ι

Sig O u t
Oscilloscope

(MHz)

I n s)

'UT 1

4 ΙΝΤ

BW

Τ r
t

CA L

Ι

CA L

Ι

CA L (MHz) Ι (n s)
Ο .2
πΑ 0r
less
( Ο .2 D Ίν at 1 mV/D Ίν )

'Acc
ur acy p ercentages apply
to
all deflection facto
r s . Plug-in GAI N
m
u st be set at t h e d eflection
facto r
d
esig n
ate
d at t h e app licable
position of t h e V O L TS/DI V switc
h . Wh
en
α pr ob e is u se d , t h e GAI N
2 ηΑ or less (2 D Ίν at 1 m V /D
Ίν )

m u st be set with t he calib r ation signal a p p lied to
t he pr obe ti p .
2 E XTe rn al CA L ib r ator, 0 ° C to 50 ° C : The p l u g-i
n
GAI N
is set (within
10 ° C of t h e op er ating temp e r at u re) u si ng an exte rn al calib
r ato r
signal w h ose acc u racy is wit h i n 0 .25% .
'I N Te rn al
CA
L ib r ator, 15 ° C to 35 ° C : T h e plug-in GAI N is set u si n g
t h e oscillosco p e's own calib r ato r and t h e i n str u men t is op e r ati
n g
within t he +15 ° C to +35 ° C range .
'I N Ter n al CA Lib r ato r , 0 ° C to 50 ° C : T h e plug-in GAI N is set (wit hin
10 °
Cof
t h e o p e r ati ng tem p e r at ur e) u si n g t h e oscilloscope's own
calibrator, and
t h e inst rum ent is o p e r ati n g within t h e 0 ° C to +50 ° C
r ange
.
ENV I R O NMEN TA
L
CH
A R ACT ER ISTICS
TA BLE 1-3
Ty p e 7 Α 13 teste d alone (se p arate f r om in d icator oscil-
loscope)
Information
To 50,000 feet a n d -55° C
Q u alifie d u nde r N ational Safe
Tran sit Committee test p r oce d u re
1 Α , Catego r y ΙΙ

J ` ξ
Οα
α
---------------------------------------
----------
ϋίϋϋϋϋϋϋϋϋϋίπ ~ πσϋϋϋϋϋϋίίϋιίιιί πίίίίίιίίί ~ ίίίίίίιίίιίίίίίιιίιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι ιυπι " π "
ιιιι

igloo
ιιιιυππ
ιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι ιιυιυ "
πιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιππ " ιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι " π "
ιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι ιι 1/ // " ο " ιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι
/// ιο " ιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι 1// π " σ
ΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙ "1111/1 / """"" ΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙι 11 Ι 11 Ι 11111111 ι /ι // """"
ΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙ //// """"
ΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙ . . : ~ 1 ι/// """"" ΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙιΙ 1 ιΙ 111 ΙΙΙ / ΙΙΙΙΙΙΙΙΙΙΙΙι 1Ι 111111 ΙΙΙΙ // """" ΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙι 1Ι 111111111 ΙΙΙΙΙΙ 11 ΙΙ 1111 Ι 11111 " ///// """
Specification-Type
7 Α 13
λ
υ
ε
m
ά
Fig . 1-2 .

Ty pe

W3 common
mo d
e
rejection r atio g r a ph . It pertai n s to 1 mV /Div t hr o u g h 20 mV /D ίν deflection facto r s .

NOTES