Tektronix 7D20 User manual

GUIDE

070-
USER
3
Ό 5- Ό
Ρ
42
TEK
PR
OG
RA MM A BLE
DIGITIZ ER
Te k tro n ix .
CO MM ITT ED TO EXC ELLEN C E

Intro d uction
T h is r eference gui de is inten d e d to h el pα user to o p erate
t he 7D20 . Settings an d comman d s are explaine d briefly
andα page number in t he 7D20 O p erator's Manual is given fo r
obtaining furt h er information .
Copyright©1982, Tektronix, Inc . All rights reserved .
Contents
of this p ublication may not b e reproduced in any form without the
written p ermission of Tektronix, Inc .

F ront P anel Settings
S h ift
F
unctions
2-92
f : S h ift fu n ction allows access to
functions h ig h lig h te d in orange .
Push `f' t h en function key .
V ertical Am p lifier 2-92
V O L TS/DI
V :
Sets vertical sensitivity
in 1,2,5 se q u ence from 5m V /Div to 5 V /Div
.
V A R IA BLE : Continuously variable to at least 12 .5 V olts/Div
.
CO U PL I NG : AC ; P rovi d es AC cou p ling of in p ut signal .
DC ; P rovi d es DC coupling of
input signal .
G ND ; Sets VZ R ( V ertical Zero R eference)
for t h
e
d igitizer .
I NV E RT : Inverts signal connecte d to C
h annel 2 .
P OSITIO N : A d j usts position of trace vertically ± 10 d
ivisions from center
g r aticule .
Time B ase Controls 2-96
Τ / ΜΕ /DI V : Sets h orizontal swee p spee d in 1,2,5 se q uence from 50
ns/Div
to
20s/Div an d selects
ΕΧΤ C L OC K .
P OSITIO N : Positions waveforms h orizontally .

Trigger
Co
n trols
2- ιο 3
S
L
O
P
E :
T r igge r on p ositive (w h en illuminated) or negative slo p e .
LEVEL : Sets t r igge r level .
TR
IG POS :
A d j usts for 0 to 1500 d ivisions p ost-trigger .
TR IG POS ρ : Ad j usts for 0 to 10 d ivisions p retrigger .
Trigger Source
2-99
MOD E : Trigger source set by Ac q uire Mo d e .
CH 1 :
Triggers
on C
h annel 1 input signal .
C H 2 :
Triggers
on C h annel 2 in p ut signal .
L I
NE :
Trigge r s on mai n f r ame line fre q u ency .
EXT . Triggers on exte rn al t r igge r inp u t (±1 V max) .
f,
ΕΧΤ
=10 :
Triggers on external trigger in p ut wit h 10 Χ attenuatio n
(±10 V max) .
Trigger
Cou p
ling
2-
ιοο
AC :
AC cou p les trigger signal (-3d B at 30 H z nominally .)
LF REJ : AC cou p les trigger sig n al (-3d B p oint at 40 kH z nomi n ally .)
HF REJ : Sets h ig h fre q uency (-3d B p oint at 40 kH z nominally .)
DC : DC cou
p
les trigger
signal .

Trigger M ode 2- ιοι
Ρ -P : Triggers at α % of p ea k -to- p ea k trigger or free runs w h en no
signal present .
A U TO : Triggers
on
a d e quate signal level or free runs .
N
O
RM :
Swee p is generate donly on ad e q uate trigger
.
U se for re p etitive
signals below 30 Hz .
H
O
LD
NEXT : Terminates ac q uisition at en d of next
waveform
ac q
uisition .
Acquire M ode 2-95
C
H
1-1 : Ac q uires signal from C h annel 1 V
ertical into
M
emory 1 .
BOTH : Ac qu
ires signals from C h annel 1 an d C h annel 2 into M
emories 1
an d2 res p ectively .
ADD : Ac q uires
the sum of C h annel 1 an d C h annel 2 into
M emory 1 .
CH 2-2 : Ac q uires signal
from C hannel 2 V ertical into M emory 2 .
M emory Display 2- ιο 5
1-6 :
Disp lays contents of W aveform M emories 1-6 .
CO P Y : Co p ies co n tents of
one memory into anoth er .
εχΑΜΡτ .
ε : `CO
P
Y 1-)6' places waveform from M emory 1
into
M emory 6 .

M emory Dis p lay
(cont
i nued)
CS W :
Selects cursor
waveform .
EXAMPLE : 'CS W 3' sets W aveform 3 as t h e Cursor W aveform for
mo d ifying an d ma k ing
c ur so r measurements .
f, REF : Wh en Cursor W avefo r m is ίη ' ΝΜΑ
G'
or' V
S,' causes unmag n ifie d
ΥΤ d is p lay of Curso r W aveform .
Cursor W aveform Controls
2- ιο 8
VX PD
:
Curso r W
aveform is ex p ande d to t h e next more sensitive vertical
setting in 1,2,5 se q uence .
V
C
MP : Cu r sor W avefo r m is
com
p
ressed to t h e next less sensitive vertical
setting in 1,2,5 se q uence .
HM AG : Causes α ten times h
orizontal magnification of t h e Cursor
W
aveform .
f, HM AG A LL : Causes α ten times h
o
r izo n
tal magnification of all store d an d
d isplaye d waveforms .
VP LI P : P ositio ns t h e C u rsor
Waveform u p war d on t h e C RT d isplay .
VP DN :
P
ositio ns the Cursor W aveform d ownwar
d on t
he
C
RT
d is p lay .
VS : P uts 7D20 in X
-Y mo
de
wit
h
t
he
Cursor W avefo r m as Υ an d any
ot
h
er waveform as Χ .

EXAMPLE
:
Wh en VS is p r esse d , `CS W 1 V S
#'
is d is p laye d . T h e
user t h en enters α number from 1 to 6 .
Cursor Controls 2- ιι 2
α
1 :

P ositions Cursor 1 to t h e left .
1 C> :

P
ositions Cursor
1
to t
h
e
rig h
t .
α
2 :

P ositio n s Cu r sor 2 to t h e left .
2C>
:

P ositions Cursor 2 to t h e rig h t .
f,
ΔΟΝ : Turns on
Cursor
2 .
f Δ O
FF :
Turns off Cursor 2 .
f, I ND EP : Allows eac h waveform to maintain in d epen d ent cursor p ositions .
f, A LIG N : Aligns cursors on all waveforms to t he c u rsor p ositions on t he
Cursor W aveform
.
W aveform P
rocessi
n g
Controls 2- ττ 5
SET N :

Determines value of 'N' for use wit h `A VE ' an d `ENV' controls . ` Ν ' is
set in p owers of 2 from 8 to 256 .
A
V
E : I n coming signal is average d until terminatedby' H O L D' or ` H O L D
NEXT' .
ENV :
Continuous envelo pe of t h e incoming signal is d is p laye d until
terminatedby' H O L D' or ` H O L D NEXT' .
f, A VE Ν : Averages ` Ν ' waveforms t h
en enters
H
O
L D .

W aveform P rocessing Controls (Cont i n u ed)
f,
ENV Ν : E nvelo p es ` Ν ' waveforms t hen enters H O L D .
H O
LD
:
Termi n ates acq u isitio n s imme d iately .
VE CTO R : Tur n s vectors j oining ad j acent d ata p oints ON or O
FF
S p ecial F unctions
2- ι2 ο
ID :
Pr oduces α s p ecial G P I B a n d i n strument i d entificatio n menu
w h ic h is use d to select G P I B system p arameters .
R
QS :
Ge n erates α service re q uest (S RQ) .
f, R QS
# :
Generates SR Qs wit h uni que event codes .
P
us
h R
QS# and α
n u mber from 1 to 6 .
PR O BE
ID EN TI F Y : P us h ing t h ep robe i d entify b utton on α Ρ 6053 Β P robe will
gene r ate an S R Q wit h α uni
que
event code for eit
h
er C
h
annel
1
or
C h annel 2 .
M enu Driven F unctions
2- α 3
P
ress t h e MEM O
RY DIS
PLAY buttons to ma k e t
h
e
menu
selections .
MENU :
Dis p lays t h e followi n g me n u :

M AST ER MENU
1,#
STO RE
PANEL #
2,# RE CA LL
P
A NEL #
3, DIS PLAY
CA
LP ATT ERN
4, U TI L ITI
E
S
1,# STO RE PA NEL
# :
Stores t h e current front p anel settings in α
user
selectable, non-volatile settings memory location (1-6) .
2,# RE CA LL P A NEL
#
: R ecalls an d imme d iately im p lements any
one of t he front panel settings p r eviously store d using t he STOR E
PA NEL f u nction .
3, DIS PLAY CA L P ATT ERN : Dis p lays α calibration p attern on t he
C RT to allow corrections to t h e 7D20's d is p lay p resentation
.
P ress button 4 to d is p lay t h e following U tilities Submenu :
U TI L ITI ES
1 S EN D CS W ASCII
2 SE ND CS W B I NA RY
3 RE ADO UTON/OFF
4 ΕΧΤ C L OC K P O L A R ITY
5 IN IT FR O NTP A NEL
6 M AST ER MENU
1 S EN D CS W ASCII : Sen d s t h e Cursor W aveform p reamble a n d
d ata p oints
to another d evice in
LIST
EN ONL Y mo de . 7D20 must
be in TALK O NL Y mo de . Data e n co d ing is ASCII .

M enu-Driven F unctions (Co n t inu e d )
2 S EN D CS W B I NA R Y : Same as #1, exce p t t h at d ata p oints
encoding is b inary .
3 RE ADO UT ON/OFF : Tu r ns text d is p layed
on
lines 1,2 an d
15,16
on an d
off .
L ines 3-14 are always available to d is p lay me nus or
text .
4 ΕΧΤ C L
OC
KP
O
L AR ITY :
Determines w
h
ic
h
transition (+ or -)
of t h e E xternal Cloc k will be recognized by t h e 7D20 w h en ΕΧΤ
C L OC K is selecte d .
5 ΙΝΙΤ FR
O
NT P A NEL :
Initializes front- p anel settings to t h e
following con d itions ;
V
ER TICA L
VO L TS/ D 1 V :1
CO UPL I NG : AC
C H 2 I NVER T : O FF
T R IGG ER I N G
M
OD
E : Ρ - Ρ
H O L D
NEXT OFF
CO UPL I N G : AC
SOUR CE : M OD E
S L O PE : P OS
P OSITIO N : 0

H
O
R IZO
N TA L
ΤΙΜΕ /DI V : l
ms
ΕΧΤ
CL OC KP O L A R ITY :
P
OS
MEM O RY DIS PLAY
DIS PL AY 1 : ON
DIS PL AY 2-6 : O FF
CS W : O FF
CO
PY
: O FF
REF : O FF
C UR SO R WFM
CS W :1
V XP D,VC MP,VPUP,VP DN : O FF
HM AG, VS : O FF
ACQ U ISITIO N
ACQ M OD E : CH 1
C URSO R S
M OD E : A L IG N
ΔΟΝ : O FF
C URSO R 1 :
POINT
0
C URSO R 2 :
POINT
1023
OT HER
A VE ,A VEN,ENV,ENVN
:O
FF
MENU,R QS, R QS #,ID, H O L D :
O
FF

6 M AST ER MENU : Dis p lays t he M aster M enu
f, T
E ST
: Disp lays t h e following Test M enu
TE ST MENU
1 E XE C UTE S ELF T E ST
2 *CA L I BR ATIO N*
3*E XTEN DE DT E ST*
4* CI RCU IT E X ER CIS ER *
*S ERV IC E O NL Y*
All selectio ns (ot h er t
han
item
1,
SE
LF TE ST) are for q ualifie d
service personnel only .
W arning M essages
2-88
T he following warning messages are d is p
laye d in t h e P rompt
F iel d of t h e CR T
0-10 T P OS
RE QD :
Dis p laye d w h en R O LL or EXTer n al C L OC K mo d e entere d wit h α
negative trigger position, wit
h A VE
or
ENV active . In d icates t h at
P osttrigger is unavailable .
H O L D RE QD :
Displayed if VPUP, VP D N, V C MP or VXPD is pus h e d w h ile t he
7D20 is actively ac q uiring into t h e Cursor W aveform . In d icates
H
O
LD
mode
is re qu ire d .

H MAG, V S
RE QD :
Disp laye d if `REF' is push e d w hen t h e 7D20 is not d is p laying α
M agnifie
d Cursor W aveform o
r
is not in V S mo d e .
CS W RE QD : Disp laye d if t h e user attem p ts to turn t h e Cursor W aveform
d is p lay off . T h e CS W is r
e q
uire d at
all
times
.
UP DAT
E
IG N O RE D : Disp laye d after an attem p t to c h ange any
of
t h
e p
arameters in
t
h
e
ID M
enu w h en t h e 7D20 is in t h e REM OT E -wit h -loc kout state .
R QS O FF : Occurs w hen t h eR QS or probe I d entify button
is p us
h
e d
an
d t
h
e
R
QS
M
as k has been turne d off or G
P
I B Service R equests a r e
d isable d .
T h
e
following E
rror
M
essages are all d is p laye d w h en t here is α
failure i n t h e Selftest . T h eE A R O M F AI LE Dmessage is also given
w h en t he RE CA LL comman
d is execute d an d t
h
e memory calle d
contains invali d data . R efer to q ualifie dservice p ersonnel for
corrective action .
S
ELF TE
ST
F AI L
G
P I B F AI
LE D
E A R
O
M F AI LE D

G P I B F unctions
Selecta b le P ara m eters 4-4
P
us h
ing t he `ID' button d is p lays t h e following sp ecial f u nction
menu :
S ELE CTA BLE
M
OD
E S : O
FF,
TA LK O
NL Y, L IST EN
O
NL Y, TA LK / L IST EN
S ELE
CTA BLE
T ERM I N ATO R S : ΕΟΙ , LF
/
ΕΟΙ
S ELECTA BLE
ADD RE SS E S : 0-30
G P I B ID EN TI
F
ICATIO N
1D ΤΕΚ /7D20,( r om) .( p atc
h
4 S ELE CT M OD E
5 S
ELE
CT
T ERM I N ATO R
6 S
ELE
CT
ADD RESS
PRE SS ID KEY TOUP DAT E A ND EXIT
NO
UP DAT E IN REM OT E O NL Y
Selectio ns are ma de by pus
h
ing t
h
e num
be r
e d k eys
in
t
he
MEM
O
R Y DIS PLAY function grou p . All selectio ns will be
im p lemente d w h en `ID' is p resse d to exit
.

Command
F ormat : 4- ιι
T he 7D20
comman dformat is t h e following :
HE
AD ER / L I NK /A RG UME NT
Comman d names are s p elle das
printe d on t he front p anel
.
T h
e
response of t h e 7D20 to α
H
el p
Query (HELP?) is α list of all
of t h e vali d
comman d h ea d ers :
HELP?
CH 1, C H 2, TR IGG
ER ,HORIZONTAL, DISPLAY, COPY CS
W ,AQ R ,
C UR SO
R , STO RE , RECA LL, DT, I N ITT E STCA
L , R OS,C ER , EX R ,I NR ,
E X W ,O
P
C,
U S ER , P ID, WFMPRE ,C UR V E
,DATA,T E XTDEBUG,
RE
CO
R DI N G, LONG FORM
H eader, lin k , and argument
names may be abbreviate d
as long
as t he abbreviations are unique . T
he following exam p le s h ows
t hree
i
d
entical G P I B comman ds :
T R IGG ER ΜΟ D Ε : Ρ -P, CO
UPL I N
G :AC
HFREJ, S L O PE :PLU S
T R IG ΜΟ D Ε : Ρ - Ρ , CO UP
:AC HFR E J, S L O P :PLU S
T R ΜΟ : Ρ -,000 P :AC H , S L:PL
M ulti
p
le
comman d s may be sent in α single string p rovi de d
t hey
are se parated by α semicolon .
EXAMPLE
( M ulti p le Command string) :
T R IG SOUR C
E
:
M
OD
E ; DIS P 1 : ΟΝ

Comman d
F
ormat (Continued)
M ulti p le arguments are sep arate dbyα comma .
EXAMPLE
(
M
ulti
p
le
arguments)
:
TR IG SOUR CE : M OD E , CO UP AC
Queries
Q u eries solicit information from t h e 7D20 . T h ey consist of α
h ead er followe dbyα '?' or α h ead er followe d by α `?followe d by
α label .
EXAMPLE
(
H
ea d er only q uery) :
CH 1?
7D20 R es p onse :
CH 1 V O :2, P OS1 :-1,000 P :AC, VA :ON
EXAMPLE (
H
ea
de r a n d label q u ery) :
CH 1? V O L TS
7D20RE SP O N SE :
C H 1 V O :2
Queries may be abbreviate d using t he same guidelines as for
abbreviating comma n d s .
L O NG F ORMON Ι OFF sets t h e 7D20 res ponse to q ueries to
eit h er abbreviate d or longform .

S
R Q'S
4-25

STAT U S B YT ES

DE
CI
M
A L
F ATA L ERR
O
R

227

243
POWER ON

65

81
US ER RE
Q UEST

67

83
EXE CU TIO N ERR
O
R

98

114
I NT ERN A L ERR
O
R

99

115
E X ECU TIO N W A RN I N G

101

117
I NT ERN A L W A RN I NG

102

118
O PER ATIO N CO MPLE TE

66

82
NO STAT U S TO REP OR T

0

16
T h e first column of d ecimal values
are generate d wit hout t h e busy
bit set an d t h e secon d column is wit h t h
e busy
bit
set .
T he 7D20
is
consi d e
r
ed busy if i np rocess of A VEN, ENVN, or H O L D NEXT
E vent Queries (EVEN T? or ERR O R?) 4-32
T he EVEN T
Q
UER Y
is α means of
p
rovi d ing d etaile d information
as to t he nat u re of, or t h e reason for, t he generation of α Service
Re q uest (S R O) .
EVEN T? Is res pon d ed to wit h an event co d e d efine d below .
EVEN
T#)
A LLEV? Is res p on d e d to wit hα list of all p en d ing event co des .
EVEN T (1 ),~ 2), . . .

Event Q ueries (Co n t inu e d )
EVQTY? is res p on ded to with t he number
of
p
en d ing event
co d es
.
EVQTY
(#)
Define
d E vent Co d es :
CODE
DESCRIPTION
CO
MM
A N D ERR O RS
108

Checksum Error in Curve
Data
109

Illegal Byte count Error
151

Symbol or Number
too long
152

Invalid or Co n trol Character Input
153

Invalid Special
Character After Escape
154

Invalid
Number In p ut
155

Invalid String Input
156

Symbol not found
157

Syntax Error
158

Invali d ΕΟΙ
159

Invalid Delimiter
160

E xpression too complex
161

Excessive Binary Curve Points
162

Excessive ASCII Curve Points

E XECU TIO N E RR O RS
203

Ι / Ο Bu ffers full, Output dum ped
250

Not in HO LD mo de .
251

Illegal Waveform N umber
252

Illegal Settings Memory
253

Illegal Cursor Number
254

Settings RE
CA
LL
error
255

Dis p lay R eference error
256

Turning off CS W display error
257

Illegal Data Memo r y N um b er
258

RO LL mo d e, A VE, ENV, negative
TR IGG ER P OSITIO N error
259

Waveform Pream b le illegal Ν R . ΡΤ
I N T ERN A L ERR O RS
331

S ELF TE ST failure Mo d ule 1
332

S ELF TE ST failure Mo d ule 2
330+ ΧS ELF TE ST failure Module Χ ( Χ =1-63)
394

S ELF TE ST
com
p lete and it failed

SYST EM EVEN TS
401

Power ON
403

U ser R equest (RQS
KEY)
450

H OLD
after
A
VEN, ENVEN, or H OLD NEXT
451

R
QS
1
452

R QS 2
453

R QS 3
454

R QS 4
455

R QS 5
456

R QS 6
457

R QS 7(CH1 P robe I d entify)
458

R QS 8(CH2 P robe I d entify)
459

SRQ pen d ing
460

SELF T EST COMPLETED and P ASSED
E X E C U TIO N W A RN I N G
550

VOLTS/DIV o ut of r ange
551

VERTICAL POSITION o ut of range
552

TRIGGER LEVEL o ut of range
553

TRIGGER POSITION o ut of range
554

HORIZONTAL ΤΙΜΕ /DIV out of range
555

V XPD out of range
556

CSW POSITION o ut of range
557

SET Ν value out of range