Tektronix 7603 Operator's Manual page 15

ι
Dis p lay
Ph
otograp
h
y
Α per
m
a
n
ent r
eco
rd
of t
h
e C
R
T d is
p lay can b e o
b
tai
n
e
d
w
it
h
an oscillosco
p e ca
m
e
r
a system . T
h
e i
n
structio
n
manuals fo
r
t
h e T
EK
T
R
O
N
IX
Oscillosco
p
e Cameras
incl
u
de com
p lete i
n
structio
n
s fo
r
o
b taini
n
g waveform
ph
otogra
ph
s . T
h
e following s
p ecific i
n
fo
rm
ation a
pp
lies to
t
h
e 7603 .
ι
ι
ι
ι
ι
ι
ι
ι
T
h
e C
R T bezel of t
h
e 7603
pr ovides i
n
teg
r al mo un ting
fo
r
α
T
EK
T
R
O
N
IX Oscillosco
p e Ca
m
e
r
a . T
h
e t
hr ee pins
locate
d on t
h
e left si
d
e of t
h
e C
R
T bezel co
n
nect
p owe
r
to
com
p
ati
b
le ca
m
era syste
m
s . It also receives control sig
n
als
f r
om T
EK
T
R
O
N
IX automatic cameras to allow came
r
a-
co
n
t
r
olled si
n
gle-s
h
ot p
h
otog
r
a
ph
y (see came
r
a m a
nu
al for
f ur t
h
er i
n
formatio
n
) .
V
ertical
M
od e
L eft and R ig
h
t M ode . W
h
e
n
t
h
e
LEF
T or R IG
H
T
bu
tto
n
of t
h
e
VER
T M OD
E switc
h
is presse
d , only the
sig
n al f
r
o
m
t
h
e
p
lug-i
n un
it i
n
t
h e selecte
d
compart
m
e
n
t is
d is
p
layed .
Alte
rn
ate
M
ode .
T
h
e A
L T positio
n
of t
h
e
VER
T M OD
E
switc
h
pro
d
uces α dis
p lay w
h
ic
h
alter
n
ates b etwee
n
t
h
e
p l
u
g-i
n un its i
n
t
h e left vertical and rig
h
t vertical co
m
part-
me
n
ts wit
h
eac
h
swee
p
of t
h
e C
R
T . Alt
h
o
u
g
h
t
h
e A
L T
mode can b e
u
sed at all sweep rates, t
h
e C
H
O
P
mo
d
e
p
r ovides α m o
r
e satisfacto
r
y d isplay at swee
p r
ates
b
elow
a
b
o
u t 20 milliseco
nd
s/divisio
n
. At t
h ese slower swee
p r
ates,
alte
rn
ate-mo
d
e switc
h
i
n g becomes vis
u
ally percepti
b le .
T
h e T
R
IG SO
UR
C
E switc
h
allows selectio
n of t
h
e
triggeri
n
g fo
r
an alte
r
nate d is
p
lay .
Wh
en t
h
is switc
h is set to
t
h
e
VER
T M OD
E
positio
n
, eac
h
sweep is t
r
igge
r
e
d b
y t
h
e
signal being dis
p layed on t
h
e C
R
T . T
h
is provi
d
es α stable
d is
p
lay of two
unr elate
d signals, but d oes not in
d
icate t
h
e
time relatio
n
s
h ip b etween t
h
e sig
n als . In eit
h
e
r
t
h
e
LEF
T o
r
R
IG
H
T positio
n s of t
h
e T
R
IG SO
UR
C
E
switc
h
, t
h
e two
sig
n
als are d is
p layed s
h
owi
n
g t
ru
e time r
elations
h
ip .
H oweve
r
, if t
h
e sig
n
als are
n
ot ti
m
e-
r elated, t
h
e d is
p
lay
from t
h
e p l
u
g-in
u
nit w
h
ic
h
is not provi
d
i
n
g α trigger sig
n
al
will ap
p
ear u
n
sta
b le on t
h
e C
R
T .
ΝΟΤΕ
Th is instrument will not ope
r
ate in t
h
e A
L T mo
d
e if
t
h
e ho
r izontal plug-in unit is not o
p
e
r
ate
d in t
h
e
time-base mode.
Operating I
n
st
ru
ctions-7603/
R
7603 Ope
r
ators
rates lower
t
h
a
n
about
20 m illisecon
d
s/
d
ivisio
n
, or
w
h
e
n
eve
r du
al-t
r
ace single-s
h
ot
ph
e
n
ome
n
a
a
r
e to be
dis
p
laye
d
. At faste
r sweep rates, t
h
e c
h
o
pp e
d
switc
h
i
n
g
becomes a
pp
arent a
nd m
ay i
n
terfe
r
e wit
h
t
h
e dis
p lay .
Correct i
n
ter
n
al t
r
igge
r
ing for t
h
e C
H
O
P
mode ca
n b
e
o
b
tai
n ed in any of t
h e t
hr
ee p ositio
n
s of t
h
e T
R
IG
SO
UR
C
E switc
h
.
Wh
e
n
t
h
e T
R
IG SO
UR
C
E
switc
h
is set to
VER
T M OD
E
, t
h
e i
n
te
rn
al t
r
igge
r
sig
n
als from t
h
e ve
r
tical
p l
u
g-in u
n its a
r e algebraically adde
d
a
nd
t
h e time-
b
ase
u
nit
is t
r
igge
r ed from t
h
e resulta
n
t sig
n al . U se of t
h
e
LEF
T o
r
R
IG
H
T t
r
igger-source
p ositions t
r
iggge
r
s t
h
e time-
b
ase
un
it
on t
h e i
n
te
rn
al trigge
r
sig
n
al from t
h
e selecte
d vertical
u
nit
only . T
h is allows two ti
m
e-
r
elate
d
sig
n als to b e d is
p
laye
d
s
h
owi
n g true ti
m
e
r
elatio
n
s
h
i
p . H owever, if t
h
e sig
n
als a
r
e
n
ot ti
m
e-relate
d
, t
h e display f
r
o
m
t
h
e c
h
a
nn
el w
h
ic
h
is
n
ot
pr
ovi
d
i
n
g t
h e trigge
r
sig
n
al will a
pp
ea
r u n
sta
b
le . T
h
e C
H
O
P
mo
d e can b e use
d
to com
p
a
r
e two si
n gle-s
h
ot, t
r ansient, or
ra
nd
o
m
sig
n als w
h
ic
h
occ
ur wit
h
i
n
t
h
e ti
m e interval
d ete
rm
i
n
e
d b
y t
h
e ti
m
e-
b
ase
un it (ten times selected swee
p
r
ate) . To
pr ovi
d
e co
rr ect t
r
iggeri
n
g, t
h
e d is
p lay w
h
ic
h
pr ovides t
h
e t
r
igger sig
n
al
mu
st
p
rece
d
e t
h
e seco
n
d d is
p
lay
in time . Si
n
ce t
h e sig
n
als s
h
ow true ti
m
e relatio
n
s
h
i
p
,
time- d iffere
n
ce
m
eas
u
re
m
e
n
ts can be ma
d e f
r
om t
h
e
d isplay .
Alge
b
raic Ad
d ition .
T
h
e ADD p ositio
n
of t
h
e
VER
T
M OD
E
switc
h can be
u
se
d
to
d
is
p lay t
h
e s
u
m or d iffe
r
ence
of two sig
n als, for commo
n
-mo
d e re
j
ectio
n
to
r
emove an
und
esi
r
e d sig
n al, o
r for DC offset (a p plyi
n
g α DC voltage to
o
n
e c
h
a
nnn el to offset t
h
e DC com
p
o
n
e
n t of α sig
n
al on t
h
e
ot
h
er channel) . T
h
e co
mm
on-mode re
j ection ratio b etwee
n
t
h
e vertical p l
u
g-i
n com
p
a
r tments of t
h
e 7603 is greate
r
t
h
an 20 :1 at 50 m
ega
h
ertz . T
h
e
r
e
j ection ratio i
n creases to
100 :1 at DC .
T
h e overall d eflection facto
r
on t
h
e C
R
T i
n
t
h
e ADD
mo
d
e is t
h
e resulta
n
t of t
h
e algeb
r
aic a
dd
itio
n
of t
h
e sig
n
als
from t
h e two vertical p l
u
g-i
n un its . It is diffic
u lt to
d etermi
n
e t
h
e voltage a
mp
lit
ud e of t
h
e res
u
lta
n
t dis
p lay
un
less t
h
e am
p
lit
ud
e of t
h
e signal a
p plie
d
to o
n
e of t
h e
p l
u
g-i
n un its is
kn
ow
n.
T
h
is is
p a
r
tic
u
larly t
r
ue w
h
e
n
t
h
e
ve
r
tical
un its are set to differe
n
t d eflectio
n
facto
r
s, since it
is
n
ot o
b
vio
u
s w
h
ic
h p
ortio
n
of t
h
e d is
p lay is α result of t
h
e
sig
n
al applie
d
to eit
h
e
r
pl
u
g-i
n un
it . Also, t
h
e polarity a
n
d
r
e
p
etitio
n r
ate of t
h
e a
pp
lie
d signals e
n
ters i
n
to t
h
e
calc
u
lation .
T
h
e followi
n
g ge
n e
r
al
pr
eca
u
tio
n
s s
h
oul
d b
e o
b
serve
d
to
Ch
o
pp
ed M o
d e .
T
h
e C
H
O
P p osition of t
h
e
VER
T p
r
ov ide t
h
e best d is
p lay w
h
e
n u
si
n
g t
h e ADD mo
d
e :
M OD
E
switc
h pr o d
u
ces α d is
p
lay w
h
ic
h
is elect
r
onically
switc
h
e
d b
etwee
n
c
h
a
n
nels at α one-mega
h
e
r
tz
r
ate . In 1 . Do
n
ot excee
d
t
h
e i
n put voltage rating of t
h
e p lug-i
n
ge
n
e
r
al, t
h
e C
H
O
P m
o
d
e
p
rovi
d
es t
h
e b est d isplay at swee
p
u
n
its .