Tektronix 7A16P User manual

IN
C H
AR OF THIS MANUAL .
Te k tronix, Inc .
Ρ . Ο . Box 500
B eaverton, Orego n
97077

Serial Nu m ber _
COMMIT TED TO EXCE LLE N
C E
C K FOR CHANGE
INFORMATION
h . . J CT Ι O Ν
MANUAL
070-2308-00

F irst P rinti n g MAY
1978
P ro d
uct Gro up45

R evise d JUL
1983

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SAFETY S U MMA RY
7Α16ΡINS TRU CT I
ON
TABLE O
F
CO NTENTS
P R EFACE
SECT Ι
O 1 - INTRODUCT I ON
ix
Sp ec ifi cat i on s
1-1
S u mma ry of
Pr og
ra
mm ab le F eat ures 1-6
Fr o n t-Pa n
el
Bu
tto ns 1-7
Fr
o
n t-Pa n e l
Co ntro l s 1-8
Block Di ag r am
11-10
SECTION 2 - M ANUA L
OPERATION
In sta llat i on 2-1
Co
ntrol
s, Co nn ecto r s, and In di cato rs
2-3
I NPU T Conn ecto r s
2-3
Α-Β Sw
i
tc h
2-3
1 M egohm - 50 O hm Sw i tc h
2-3
A C-G
ND - DC Sw
i
tc h es
2-3
P
OS
ITI
ON Co nt r o l 2-4
VARIABLE (C AL IN) Co nt r o l
2-4
G A I N Ad j u st ment 2-4
BA N DW ID TH Sw i tc h
2-4
POLA
RITY Sw
i
tc h 2-4
VO L TS/ DIV S wi tc h es
2-5
IDENTIFY Sw i tc h
2-5
Fun ct i ona l Ch ec k
2-5
Pr e li m in a ry Set up
2-5
Power-up Sequ e n ce
2-6
Pr oced ur e
2-6
General O p e r ating Inf o r mat i on
2-8
S i g n al Con n ect ions
2-8
V er t i ca l Ga in Ch ec kand
Ad j u st m e n t
2-8
Inpu t
Co
uplin g
2-8
V O LTS/ D I Va nd V ARIABLE
2-9
P O LARIT Y Sw i
tc h
2-9
Tr ace I de n t ifi
cat ion
2-9

7 Α16Ρ IN S TRU C TI ON
Appli cat
i
on s 2-10
Ge neral 2-10
P ea
k
-to- P ea
k
Vo
l
tage
M
eas ur eme n ts (AC) 2-10
I nsta n ta n eo u s V o l tage M eas ur e m e n ts ( D C) 2-12
Co mp a ri son M eas ur eme n ts 2-14
S EC TI ON 3 - PR OGRA N N I NG
In tr od u ct ion to the IEEE 488 Bus 3-2
Α Typi ca lSy ste m 3-2
Typ es O f I n st rum e n ts 3-2
Typ es o f M essages
3-3
M aximum
Numb e r of Dev ices
3-4
M ax imu m Ca bl e L e n gt h 3-4
Electrical S p ec ificat i o n s 3-4
Bu s Si g nal Lin es
3-5
D ata Bu s
3-5
Tr ans fer Bu s 3-5
Man age ment Bu s 3-6
Bu s M essages 3-8
7 Α 16ΡIn terf ace Fun ct i on Su bsets 3-10
Source Han ds ha k e 3-10
A cce p to r H an ds h a ke 3-10
T a lk er 3-10
Li ste ner 3-10
Se rvi ce Re qu
est 3-11
Re m ote/ L oca
l
3-11
Para ll el Poll . 3-11
D ev
i
ce Cl ea r 3-11
De vi ce Trigge r 3-11
Co ntro ll er 3-11
Addr ess in
g the
7
Α
16 Ρ 3-12
A dd r ess ing Sc he m es 3-12
Prim a ry A dd r ess ing 3-12
Seco n da ry Ad dr ess in g 3-12
Dete r m inin g D e vice A d dr esses 3-14

7Α16Ρ IN S TRU C TI ON
W A RNIN G
T h e rema in i ng p or tion o f this table o f contents l ists t h e
Servic ing instr u ct i on s . T hese Serv ici n g
inst ru ctionsare
f or u se by qu alified p erso nn e l o nly . To a vo i d e l ectr i cal
s hock , do n ot p er for m any ser vi c ing other t han t hat
ca lled
ou t in t he O p erating i n str u ct i o n s unless qua l ified to do so
.
H ig h-Lev e l M essages
3-15
E
xpl anat i on of Co mm and S yn tax 3-16
Set
Co mm
an ds 3-16
Que ry
Co mm
a
nd s 3-17
M essages 3-20
M essages w i t h Mul t ipl e Sets 3-20
M essages wi t hM ul t ipl e Qu e ries 3-21
Th e SE T ? Q u e ry 3-22
M essages w i t h Sets and Qu e ries
3-22
Que ry Res po n ses
3-23
L ow- L eve l Messages
3-24
Set M essages 3-25
Que ry M essages
3-29
Tr an
sm
i
tt ing M essages
3-32
Tr a n s mi tting
Set
M
essages
3-32
Tr an s mi tt ing Que ry M essages
3-36
Serial-Poll
R
es p on ses 3-40
P owe r on
3-40
Co mm and e rr or 3-40
E
xec
ut
i on e rr or 3-41
Bu sy 3-41
SECTIO N 4 - M AIN TENANCE
Pr e v e n t iv e M a in
tena n ce 4-1
C l
ea
nin g
4-1
E xte ri or
4-2
In teri or 4-2
Vi sua
l
I
ns p
ect ion 4-2
Lubri cat ion
4-2
Tro ubl es h oot in g 4-2
Tr oub l
es h oot in g Aid s
4-3
Sc he
m
atic Di ag ra m s 4-3

7Α 16 Ρ I NS TRU CTI ON
R
EV
Α
JUN 1979
C ir c ui t-B oard I llu st r at i ons
4-3
Co
mp
onen t- L ocato r G ri ds 4-3
Co m po nent and W irin g Co l o r Code
4-3
Se mi co nd u cto r L ead Co nfi gur at i
ons 4-3
Mul t i-Pin
Connecto
r I de n t ificat
i on 4-3
R ea r Interf ace
Connecto r Pin L ocat i ons 4-3
Tr o ub l es h oot in g Equip me n t
4-5
Sem i co ndu cto rΤ 6'ste r
4-5
Mul t im ete r
4-5
T est Oscil l osco pe 4-6
Plu g-in Exte n de r 4-6
Tr ou b les h oot
in
g
Pr ocedu r e 4-7
C h ec k Co n tr ol Sett in gs
4-7
C h ec k A ssoc i ated E qui p me nt
4-7
Vi sual Ch ec k
4-7
Ch ec k In st rum e n t P e rf o rm an ce
4-7
Ch ec k Vol tages
4-7
Tr ace t he Sign al 4-7
Ch ec k Individu al
Co
mp o n e n
ts 4-$
Repa ir
and R ead j ust t h e C ir c ui t
4-9
S p ec ifi c Tr o ubl es h oot in g
Inf o . 4-10
Mi cro pr ocesso rSy
ste
m
4-10
Se lf T est A dd r esses
4-11
Corr ect iv eMa inte nan
ce 4-13
O
b ta
inin g Re pl ace ment Par ts
4-13
Stan dard
Par ts 4-13
O r de rin g P ar ts 4-13
So l de ring T ec hn i q ues
4-14
A tte nuato r
C
ir cui t
Boa
rd
4-14
C ir c u it B oa rds (e x ce pt A tte nu ato r
B oa rd)
4-15
M eta l Te rminals
4-15
Co mp onent Re pl ace m e n t
4-16
Semico
nd u
cto r R e pl ace m ent
4-16
Fr on t-
Panel LED 's 4 φ
-16
F ree-Sta nd in g Co mp o n e n ts
4-16

7 Α
16 Ρ INSTRUCTION
REV Α JUN 1979

μ
C ircuit B oard R emoval
4-17
R emoval
of LED a nd
SWITCH Boards 4-18
R emoval
of ATTENUATOR a nd
A CTUATORBoards
4-18
R emoval
of AMPLIFIER,
SHIELD, and
PROGRAMMING-LOGIC
B oards 4-19
R ecalibration
After Repair 4-2 ρ
R
epackaging f or S hipment
4-2
ρ
S ECTION
5-C IRCUITDESCRIPTION
Introduction
5-1
Block Diagram
5-1
A ttenuator
5-3
Input and
CouplingCircuit
5-3
Χ10 A ttenuators
5-3
Buffer Amplifier
5-5
L
ow I mpedance A
ttenuator
5-5
Amplifier
5-6
P olarity Amplifier
5-6
2Χ Gain
Amplifier
5-6
Gain Amplifier
5-7
P ositioning
Circuit
5 . -7
Signal S plitter
5-8
Microprocessor
S ystem
5-9
MPU a
nd Memory
5-9
ΡΙΑ 's
5-9
Power-up
Circuit
5-10
Clock
C ircuit
5-11
Front
P anel Buttons
5-12
Switching
L ogic
5-12
G ΡΙΒ Interface
5-13
IEEE 488 D ata Bus
5-14
A cceptorHandshake
5-14
Source H
andshake
5-14
R eadout
Circuit
5-15
B
asic R eadout
Operation
5-15
Summing the Time
Slots
5-16
Selecting
R ow and Column
C urrents
5-17
Encoding α Time-Slot
5-18
ΜΡ U
ControlExample
5-18

SECTIO N 7 - E LE CTRI CALPAR TS LIST
7Α 16 Ρ IN STRUC TION
SECTION
8
-
DIAG RAM S A ND C IR C UIT B OA RDILLUSTRATIO NS
S ECT I O N
9
-
MEC HANI
CAL PAR TS L IST
V i
REV Α JUN 1979
SE CT I ON 6
-CALIB
RATI ON
In
t r od uct
i
on
6-1
T e kt roni x Fi e ld Se rvi ce 6-1
P e rf o rm an ce Chec k 6-1
Ca
li b rat
i
on
6-1
T
est
E q uipm e n t R e quir e d 6-2
Ge nera l 6-2
Ca librat i o n Equip me n t Al te rn at ives 6-2
Ch ec kin g Prog r amma bl e F eat ures 6-2
Pe rf or ma n ce
Ch
ec k Pr
oced ur e 6-5
Ch ec kin g Fr ont Pane l Fun ct i on s a nd R eado
ut δ -5
C h ec kin g B a l an ce
6-6
Ch ec k i ng Gain
6-6
C hec k i ng Rise Time
6-6
C hec kin g B an dw id th
6-7
Ca libr at i on Pr oced
ur e 6-8
Pr e limin
a
ry Pr
ocedur e f or Ca li b r at i on 6-8
C h
ec k
/ A dju st MPU C l oc kSp ee d 6-9
C h ec k / A djust DC
B a
l
an ce 6-10
A djust L
ow Fr
e
qu en
c y
Gain 6-12
Ch ec k / A djust Ga in 6-13
A
dju
st P os iti o nin g 6-15
A dju st
Inpu
t
Co
mp
e n sat i on 6-16
Ad ju st
A
tte
nu
ato r
Co
m
pe n sat i on 6-17
A dju st L
ow
Fr eque n c y Com p e n
sat i on 6-18
A
dj
u
st Hi
g
h
F
r
e qu enc y Com p e n sat i on 6-18
Ch
ec kBan
dw id t h 6-19

This
manual contains safety information w
hich t
he u ser must follow
to
ensure
safe o p eration of this instrument . W ARNING
information
is
intend e dto
protect the operator ; CAUTION information is intende dto p rotect the instrument . T he following
are general safety precautions that must be observed during
all phases of operation and maintenance .
Groun d t he Instru m ent
Do
N
ot O p erate in E xplosive At m osphere
Avoi d Live Circuits
Do N ot Service or A d just Alone
W arning State m ents
7 Α
16
Ρ IN S TRU C TI O N
W A RN I NG
Ϊ - ο red u ce electrical-s h oc kh azar d , t he mainframe (oscilloscope) chassis must be prope r ly g rou nded . R efe r to t h e mainf r ame
man u al for grou nd ing information .
Do not operate
t h is i nstrument in an area w h e r e fla m mable gases or fumes are present . Suc h operation could cause
an
explosion .
Electrical-s h oc k h aza r
ds are p
resent
in this instrument . The protective instr u ment covers must not be removed by operating
pe r sonnel . Component replacement and internal ad j ustments
mustbe refer re d to qualified service personnel .
Do not service
or ma
k
e internal adju stments to t h is instrument unless anot h e r pe r son, capable of giving first aid and
resusci-
tation, is present .
W arning statements accom p any p otentially d angerous proced
ures in this manual . The following warnings appear in this
manualand are listed here for additional emphasis
.
To avoid electrical s h oc k , disconnect t h e inst ru
ment
f r
om t he powe r so u rce before soldering .
To avoi d electrical s h oc k , disconnect t h e instr u ment from
t
he power
sou rce befo re replacing compo n ents .

7Α 16 Ρ IN S TRU CT IO N
PREFACE
Thi s m anu a l co n ta ins two m a i n d ivis i on s : operat ion a n
d se
r
v
i
ce .
Th ese divi si o n s are se par
ated
byα h
ea vy divi de r p age . Inf ormat i on
foll ow ing t hi s divid er sheet is in te n ded f or qualifi ed se rvice p e rso nne l
o nly .
Th e fir st d ivi sio n (oper ato r 's po rt i on ) beg in s w i t h
an in t r od
u
cto ry
sect i on t h at b ri e fly descri bes the 7 Α
16
Ρ Pr ogr a mm ab l e Am plifi
e
r .
Sp
ec
ifi
cat i o n s and pr og r am m ab le f eat ures o f t he p lug-in ar e a l so l isted .
Sectio n2
descri bes eac h of the fron t- pane l co n t r ols a n d co nn ecto r s, a n d
g ives co
m plete in st ru ct ions fo r ma nu al oper at i o n o f t h e plu g-in
.
M
eas urin g tec hniqu es and app li cat ions are a l so d i scu sse
d
in Sect
i o n 2 .
The l ast sect i o n o f t h e oper ato r 's
po
rtion
desc rib es pr og r amm a bl e
op e r atio n of t h e 7Α 16 Ρ v i a the
IEEE
488 Inte rf ace Bu s,
also known as the
Ge ner
al Purp ose In te rf ace Bu s (G PIB) .* Α co mpl ete li st o f de vice
mnemonics i s pro vid e d in t hi s sect ion .
The seco nd divi s i o n o f t h e manual (se rvi
ce po rt i on ) beg in s w ith α
sect ion on pr eventive a n d co rr ect iv e mainte nan
ce . Inc lu ded in t hi s
sect i
on are so m
e
ge neral t ro u
b
l es h oot in g pr oced ures . Sect i on
5
then
pr o vi des α deta iled c irc ui t desc riptio
n of b ot hthe anal og and di g i ta l
port i o n s of the 7 Α16Ρ
. Sect
i
on 6
i
s α cali br at ion pr oced ur e ; i t l ists the
e quipm e n t n
eeded, and t he ste p s r e quir e d fo r calib r atin g the i nst r ume nt
w i thi n spec ifi ed limi ts . Th e r ema inin
gt hree sect
ions pro
vide el ect rica l
p ar ts li sts, sc he m at ic diag ra m s, and
mechanical
pa r ts li sts .
A t t h
e bac
kof the ma
nu al i s α r e mov ab l e sh eet whi ch serves as α
poc k et pr og r amm in g
ai
d
.
It li
sts all o f t h e hi g h-l e v e l mn e m o ni c codes and
lo w - l eve l h exa
d ec im
a
l codes for exe r cis in g pr og r a m mabl e co ntrol of the
7Α
16
ΡPr
og r a mm
ab l
e Amplifi er .
*
D eta i
le d inf o rm at ion on t he IEEE 488 Bu s i s pr o vi ded in
IEEE
Sta n
da rd
488-1975,
pu
b li
s
hed
by the In stit u te o f El ect ri ca l & El ect ro nics
En
g in ee r s -- 345 Ε . 47 St r eet, N ew Yo rk , NY
10017 .