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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Co p y r ig h t "' 1978 Te k tronix, Inc . All rig h ts reserved .
Contents of t h is pub lication may not be re produced
i nany
form wit h out t h e written permission of Tek tronix,
Inc
.
Prod u cts of Te k tronix, I n c . and its subsi d iaries are
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n
patents a
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d/or p e
nd ing patents .
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PE - MO B ILE, and
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egistered
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ufactu
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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
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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
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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
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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
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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
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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
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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 .
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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 .
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T h e 7 Α 16 Ρ P rogrammable Amplifier
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7A16P
IN S TRU CTI ON
SECTION 1
INTRODUCTION
Th e T EKTR
O NI
X
7A16P Pr og ra mm ab le Ampl ifi er i s αw id en-ba n dw i dt h plu g-
in a mplifi er
d
es i g
n ed fo r u se in TEKTRONIX7000-Se ries pr og r ammab le
mainframes . The 7A16P ma y be inse r
ted
in a
ny 7000-Se ries ma infr ame
w i t hout da m age, b u t . Is r eco mm ended
fo r u se
onl
y in α pr og r am mab le
ma infr ame .
Th e 7A16P h as ca li b r
ated de fl ect ion f acto rs r ang in g fr om 10
m i .lli vol ts/d ivi sio nto
5 vo
l
ts/div isio n . V a riab le, but unca li br ated,
de f lect ion f
acto r s a r e a l so pr o vi ded by usi ng the VARIABLE co ntrol . The
am p lifi er inpu t can be sw i tc hed betwee ntw o inpu t conn ecto rs to a id in
au tomat ic cal ib
r at i o n of the plug-in . E i ther α 50-ohm or 1-Megohm
am plifi er inpu t i m pedan ce ca n be se l ected . A CorDC
co uplin g of t he
inpu t signal ca n b e se l ected o rt h e amplif ie r inpu t gro un ded to estab li sh
αzero-referen ce l eve l .
Th e 7A16P h as r eado u t e n cod in g and tr ace i de nt ify fun
ct
ions
.
Thu
s,
ve r t i cal sca le facto r s ca n be di s pl ayed on αpr
og r ammab l e m a infr ame
h a vin
g
r
ea do u t di s pl a y ca pa bili t y .
All fun ct i on s o f t h e 7A16P ca n be r e m ote ly prog r ammed wi th the
exce p t ion o f the VARIABLE an d
GA I N co n t ro l s and the pr obe IDENTIFY
sw i tc h . The stat u s of eac h pr og ra mm ab l e fun ct ion ca n be
set or r ea d by
co mm an ds se nt over t he
IEEE 488
bu
s . T h ese comma n ds ca n be se nt in either
αhig h-l ev el or l ow-le v el l a n g u
age, bot h of τi ni c h are deco ded by α
m i c ropr ocesso rinthe
7
Α
16 Ρ .
S peci fi catio n s
Th e fo l low in g ta bles desc rib
e t h e e l ect ri ca l , pr og ra mmin g,
e nv i ro nm e n ta l, and phy si ca l spec
ifi cat i on s of t h e 7Α 16 Ρ . Ch ar acteri st i cs
w h ose s p ec ificat ions are ch
ec
k
ed in t h e ca li b r at i o n pr oced ur e ar e li sted
un de r α co l um n entit l ed PERF O RMAN C E RE Q UIR E MEN TS . Spec ificat i ons fo r all
ot her c h ar acte rist i cs are li ste d u nde r S UPPLEM E
NTAL
IN
FO RMATI ON .
Inf o r mat i on in the S
UPPL E M E NT AL I NFO R M ATI ON co lumn is of α ge ner al n atur e
a nd sho ul d n ot be co nsi de red as pe rf o rm an ce r e quir
e
m en
ts . In cases where
αpart i c ul ar p l ug- in sp ec ifi cat i on i s ma infr ame-de p e
nd en
t, α n
ote
h
as
bee n in
c
lu
ded r eferenc in g the manual for t h e m a infr ame .
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C HARA CT ERI ST I CS
Defl
ect i
on
F acto r
Ca li br ate d Ran ge
Gain-Ratio
Acc ur ac y
Un cali b r ate d
(VARIABLE)
Fr e qu en cy R es p o n se
B a n dwidt h
A C Coupled Lower
B a nd
w i dt h Limi t
Ste pR
es p
o
n se
Ri
set im e
Limi te d-B a nd wid th
Ri set ime
7 Α
16 Ρ IN S TR U CTIO N
TABLE
1-1
ELE C TRI C AL S P ECIFIC ATIO N S
10 mV/div to
5
V/div, 9
ste ps in α 1-2--5 se quen ce .
2% of indicate d
de
fl ect i o n
f acto
r
w i th G AIN ad j u ste d at
10 mV/ di v .
50 oh
m inpu
t - 200 M Hz in
7900-Se ri es pr og ra mm abl e
ma infr a m e .
1 Megohm inpu t - 150 MHz in
7900-Se ri es programmable
ma infr a m e .
50
oh m inpu
t - Χ 1 .8 nan oseco n ds
i n
7900-Se ri es pr
og ra
mm a bl e
ma infr am e .
SU
PPL
E
MENTAL INF O RMATI O N
Continuously v ari ab
l
e
betwee n
ca lib
r
ate d ste p s ;
extend s de fl ectio
nf acto
r
to at l east 12 .5 V /d iv .
Ex pan ds de fl ect i on f acto r
se l ected to at l east 2 .5
t im es cali br ated v a lu e .
10 Hz o
rl
ess .
20 MHz, + 3 MHz .
21 na n oseco nd s max imu m .
1-2

REV Β J AN 1981
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CHARACTERISTICS
Capacitance

(

I Approx . 20 picofarads .
B aseline
Shut
VARIABLE
7Α16Ρ INSTRUCTION
T ABLE 1-1 (cont .)
S UPPLE M
ENTAL I NFORMATION
250
V (DC + p eak
AC) ;
A
C component 500 VΡ-Ρ
m aximum,
1 kHz or less .
500 V (DC + p eak AC) ;
A C
component 500 VΡ- Ρ
m aximum, 1 k Hz or less .
0
.5
division or less when
t urned through
e ntire
r ange .
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Di
s pl a y e d N oise
( m eas ur ed ta n ge n -
t i al l y)
7Α16 Ρ INST RUC TI ON
TABLE 1-1 (coot .)
PERF
O RMAN CE
RE QUI
RE
M
ENTS

Ι

S UPPLEMEN T AL INF O RMATI ON
0 .5
divi
s i on or l ess
wh
e
n
sw
i
tc hed bet w ee n 10 mV /d iv
and 20 mV / div .
0 .5 d
ivi
s i onor
l
ess wh e n
sw i tc h ed betwee n +UP a n d
INV .
0 .5 di vi si on or l ess
w h e n
sw
i
tc h e d betwee n FULL a nd
20
M Hz .
De fl ects
t r
ace +0 .2 to +0 .4
d ivi
s
i
on s
.
A t l east +10 d ivi sions
to at l east -10 d ivi si o n s
fr o m grat i c u '_ ce n te r .
From +10 .24 to -10 .22
d ivisio n s in
0 .02
divi s i on
ste
ps
.
10 mV /d iv : 0 .1 d ivi sion s
or l ess at FULL ba n dw i dt h ;
0 .02 d ivi sions or l ess
at li m i
te d ba n dw
i
dt
h .
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Overdr
iv e R eco v er y Tim e
(tested at 25 0C)
Crosst, αιΙ k
( unused inpu t to
se l ected inpu t)
F eedthro ugh
(gr ou n d fun ct ions
se l ected)
C HARA CTE R IS TICS
Set-u
pT i,,
τz
e (Full
fr
ont p ane l )
L ow- le v el
7 Α
16
Ρ
IN S TRU
C
TI ON
T AB LE 1-1 (cont .)
PERF O RMAN
C
E
RE Q UIR E MENT S
TABLE 1-2
PROGRAMMING
SPECIFICATIONS
PERFORMANCE REQ UIREM EN TS
S UPPL EME N T AL IN FO R M AT IO N
100
mi c r
oseco n ds o r l ess
to r eco ver to w i t hin 1
d ivi sion of
base lin e af te r
rem o val of overd riv e sig nal .
O v erd riv e occ ur s w hen the
fol l ow in g pea k am pli tud es
are
excee ded :
2% o r l ess
up to 200 MHz .
2%
o r l ess
up to 200 MHz .
S UPPL E MENTAL I NF
O RMATI ON
Fron t-pan e l set-up t i me i s :
(decode t im e)+( byte
co un t) χ
(t im e/by te)+(ov e rh ead) .
D ecode t im e =
11 .0 m s
Byte
count ^~ 60
Ove rh ead ==0 .4 m s
Deco
de t
im
e
a--1
.0 m s
Byte
cou n t = 10
Ove rh ead ~-_ 0 .1 ms
4 .O V (on 10-50 m V r an ge)
40V (on 100-500 mV r a n ge)
70V (on 1-5 V r an ge)
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7Α16ΡIN STR U C TI ON
ΤΑΒ
L
β
1-3
ENVIRONMENTAL S PECIFI C
A
TIO NS
F o r te mp er atur e, a ltit ude, vi br at ion, s h oc k , a nd humi dit y
s p ec ificat i on s, r e fer to the ma nu al for t he assoc i ate d m a infr a m e .
TA B
LE 1- 4
SICAL SP ECIF I CA TIONS
W eight
Dim en s i o n s
1
.2 Kg
. (2 .6
l bs .)
F i ts 7000-Se ries m a infr ame plu g- in co mp art m en t .
y of ProgrammableFeat u res
T
he
TEKTRONIX 7
Α
16Ρ Prog r am m able
A mplifi
e r ca n be op e r ate d in ei
t her
L oca l or Re m ote m ode . In L oca l m od e, i t o p e r ates lik e a non-programmable
plug-in, s u c h as the TEKTR
O
NI X 7Α
16
Α . Th at i s, i ts fun ct i ons are
co ntro llab l e o nly fr o m the front p ane l .
W hen t h e 7Α 16 Ρ i s set to R e m ote mode, h owe v e r , the front pa nel
i
s
r
e
nd
ered
in o pe rat iv e exce pt for t hree non-programmable fun ct ions :
VAR
I AB
LE,
GAIN,
and I DE NTIF Y . Under re m ote co n t ro l , fun ct ions ca n be
co ntro ll ed o nly by co m ma n ds se nt ov e r t h e IEEE 488 bus . H owe v er , as
co
n t ro l settin gs are e ff ected r emote ly , t h e front-panel l ig h ts will
i
n
d i
cate acco rd in g ly .
Th
e R emote/ L oca l state o f
t h
e 7Α 16
Ρ i
s s
l
av ed to
t he R
em ote/
L
oca
l
state of
t he
ma
infr am e in w hi ch i t i s in stalled . Thu s the m a infr ame mu st
be set to R emote mode
fo
r pr og r am m
e d
co
n t ro l of t he plu g- in, and must be
set to L oca l . m ode f or fron t- p an e l co n tro l of the plug-in .
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Fro nt-
Pan e l Bu ttons
' ΤΑ 16
Ρ IN ST RU CT I ON
E ac h pu s h b u
tto n on t h e 7 Α 16 Ρ fr ont pa ne l se rv es as bot h α s
wi tc h and
an indicato r . Α Li g h t
Emitting
Di
ode (LED) mo u nted be hin d eac h b u tto n
in d i cates the pr ese n t state of the fun
ct ion co n t ro lled b y t h at b u tto n ,
r egardless o f w h et her t h
e corres po nd in g functio n was set ma nu a lly or
u n de r pr og r am co ntrol . Th e s wi tc h es t h emse
lves are αm ome n ta ry -co n tact
t yp e ; it i s onl y n
ecessary to ta pα pa rticular b u tto n to set t h at
fun ction .
Th e op e rat ion
of t h e fron t- p an e l b u tto ns ge ner all y f a ll s into one o
f
two catego
ries . The fir st catego ry inc lud es the V OL TS/DIV an d A
C-GN
D-DC
fun ct i o n s . S ince
there are m ore t h a n two sw i tc h sett ings fo r
each of
t h ese fun ct i on s, pu shbu
tto n s in t hi s catego ry are part of α ga n ged-sw i tc h
arra n ge m en t .
Pr ess in g α pa rt i cul ar bu tto n ca n ce l s t he
sett in g of the
pr e v iousl y pr essed bu tto
n a nd se
l
ects t h en ew settin g . Fo r exampl e, if
GN D h as
bee
npr
essed or r emote ly set as ind i cated by the li g h
t in g of the
GN D bu tto n , pr ess in g the
A Cbu
tto
n w ill ext in g ui s h t h e GND lig h t arid
swi tc h the inpu t co uplin g to A C ;
t he A C b u tto n w ill then be lit to
in d i cate t h e n ew settin g .
Th e second catego ry of bu tto ns
in c lu des
t h
e fo l low in g fun ct i o ns :
BANDWIDT H (Full o r20 MHz)
PO LARI TY (+
Up
o r Inv e r t)
INPU T Connecto r ( Αo r Β )
INPUT Imp edan ce (1 M ego hm or 50 o
hm s)
S ince t h e re are j u st two settings
fo r eac h of the above fun ct i on s,
bu tto n s in t hi s catego ry are
esse n
t i
a lly togg le swi tc h es, and the
lig h t in g of eac hbu
tto n ind i cates t h e c urr en t state
of
the
fun ct i on
co n t r
olled by th at bu tto n . F or exa mp le, r e p eated ly pr
ess in g the P O LARITY
b u tto n
a l te r nate ly ill umin ates and ext
ing ui s h es the POLARITY bu tto n .
W he n POLARITY i s li t,
inv er ted po l a ri t y i s selected ; when POLA RIT
Y i s n ot
l it, n o rm a l po l a ri t y is
se l ected .
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Fro n t- Panel Con t r ol s
7A16P
INS TRU C TI ON
T here are t hr
ee 7A16P fr ont-panel rotary co n t r ols :
P OSITION ,
VARIABLE, an dG
AIN . O
nly
the P OS ITI ON co ntrol i s fully prog r
ammab le . Wh en
t he
7A16P i s in L oca l mode, the P OS ITI ON con t ro l
oper ates j u st lik e t h at
o f α
non-programmable plu g- in . That i
s, t he vert i cal pos ition of th e
tr ace i s co n t r
olle
dby
t h e c urr e n t p os i t i on o f the
kno b . W he n the 7A16P
i s set to Re m ote mode,
t
h
e P OS ITI ON co n t r ol i s di sab l ed
a
nd
t h e tr ace
pos i t i on i s dete r m ined b y
com ma n ds w hi c h set α10- bi t Di g i ta l -to-
Ana
l
og
Conv e r te r
(DAC) . S ince t h e P OSIT ION co ntr ol i s
di sab
l
ed d urin g Re m ote
oper at i on , i
ts c urr en t knob settin g ma y not in d
i cate t he t ru e t r ace
p os iti on . H owe v er ,
w
h e n
the 7A16P i s again set to
L oca
l m
ode, t h e
ve rt i ca l p
os
it i
o n of the tr ace r everts bac k to
the
p
os iti on in d i cated by
the POSITION co ntrol .
During Remote oper at io n ,
the tr ace pos i tion can be
r
ead as well as set o v er the IEEE 488 bu s .
Th e VARIABLE
co
n
tro
l
a
ll
ows the ve rt i cal sca l e facto rs
to be
in cr eased to abo
ut 2 .5 t imes the ir cali br ated
valu e (e .g ., on
5
V ol ts/Div
the scale facto r
ca n be in cr eased to about 12
.5 V o
l
ts/ Div ) . In L ocal
mode,
t
h e
VARIABLE co ntrol ca n be co nt inu
ou
sly
va ri e d over i ts ent ir e
r ange and
i s o per ativ e o nly w hen in t h e
extended (u nl atc h e d ) p os iti on . In
Re
m
ote
m
ode, the sett i ng o f t h e
VARI ABL E co ntrol ca n n ot be read or
set .
H owe v e r , the VARIABLE
co ntrol ca n be e na bl e d or d i sab l ed
und e r r e m ote
co ntrol , r ega r
dless of w h et h e r t h e co n t ro l i s
in the exte n ded or
u
n exte
nd edp osit i on . Wh e n chan g in g fr o m
L oca l to Re m ote m ode, t he
VARIABLE co ntrol i s au to m at i ca lly set
to O FF so th at the ve r t i ca l
sca
l
e
facto r s ar e ca li br
ated .
Th e G AIN ad ju
stme nt i s α fro n t-panel sc r ewd r i v er ad ju
stme nt th at ca n
vary t h e
am pl i fi er gain o v er α n a rrow r ange
to allow fo r di ff eren ces in
ga in
b
etwee n m a
infr ames . I t i s d i sab l ed wh en VARIABLE
i s se
l
ected .
Th e pr obe
IDE
NTI F
Y s witc
h
adds an o ff set to the dis pl ay ed t
r ace to
h e
lp
the op e r ato r l ocate the tr ace
in α mul t i -t r ace d is p la y . Thi s
sw i tc h
is a v a ilab l e o nly at t h e pr obe
t
ip
a nd ca n n ot be set und er r
emote
co ntro l . Th e sw i tc h sett i ng ca n ,
h owev er , be r ead unde r r e m ote
co n t ro l .
T a bl e 1-5 pr o vi des α . li st of
all the 7A16P fun ct i ons and indi
cates
whic h fun ct i ons ca n be set or r ead (
qu e ri ed) unde r m a nual a n d r emote
oper at ion . Sett in gα fun ct io n ma
nu
a lly
refers to pr ess in gα g iv
enb u tto n
or t urnin
gαco n t rol ; r ea din gα fun ct i on m an
u
al ly
r e fe r s to l oo k i n g at
R E VΑ JUN 1979
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the
ill
umi nat
i
on ofαpartic ul
a rbu tto nor n otin g t he p os itio n of α
con tro l . Sett i ng a nd r ea di ng fun ct i ons unde r r emote co n t ro l refers to
settin gα fun ct i on or interr ogat in g t h e stat us o f α fun ct i on by se ndin g
o r r ece ivi ng messages o v e r th e IEEE 488 bus . Inf ormat i o n on h ow t hi s i s
done
i
s co n tained in Sectio n 3 .
F o r mor e inf o r mat ion on eac
h
of t
h
e
fun
ct
i
ons an
d h
ow
t hey ar
e u
sed,
refe r to Sectio n 2 .
POLARITY_(+_ U _ Ρ- I NV)
INPU T a Connector ( Α
_
-
INPUT I
m pe
dance (1 M ego
hm
-50 o
hm
s)
I N PUT Co uplin g ( A C-G ND - D C)

~~
V
O LTS/ DIV
υ 4
P OS ITI O N Co
n
t
r
ol
VARIABLE Co
n
t
r
ol
l
GAIN Ad
j
u st
m e n t;
Pr obe _ A tte nu at i on ~_ γ
Plu g- in Typ e3
7Α16Ρ INS TRU C TION
TABLE 1-5
L ISTOF
7A16P FUNCTIONS
ΝΟΤΕ
An " Χ" in the abo ve c h a r t de n otes t h at α
p ar ti c ul ar fun ct ion can be set or r ead .
1
Th e sett in g o f t h e VAR I ABL E co ntrol i s n ot prog r am m a
bl
e, bu t
t h e con tro l ca n be en ab l ed or d i sab l ed in R e m ote mo de .
; Th eG
AIN
ad j ust m e n t i s di sab l ed if t h e VARIA B
LE co
ntrol i s e n ab l ed .
Th e plu g- in t ype (7 Α 16 Ρ ) i s inscribe d on the fr ont panel a nd can b e
r
ead un de
r
prog
r
am co ntrol w i t
h
t h e ID comma nd
.
REVΑ JUN 1979

1
~9
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