Tektronix 2213A Operator's Manual

R efer to 2-6 for location of items
23 t
h
ro u g h 31 .
23
TR IGG ER M o d e Switc h
es-T
h
ree sectio n switc h
t h at determi n
es t
h
e trigger mode for t h e swee p .
N O RM
-Swee p is
i n
itiated w hen an adequate tr ig-
ger signal
is app lied . In t
h
eab sence of α trigger
sig n al, no baseline trace will
be p resent .
Ρ - Ρ A U TO-T VL I NE - P
e
r
mits triggering on wave-
forms an d televisio n lines h
aving re p etition rates of
at least 20 H z .
Sweep free-runs in t he a b sence of
an ade q uate trigger signal
or w hen t h e repetition
rate is b elow
20 Hz .
T h
e
range
of t he TR IGG ER
LEVEL co n trol is rest r icted
to t
h
e pea k -to- peak
range
of t
h
e trigger signal
.
TVF I EL D- P ress in b ot h Ρ - ΡA
U TO and N O RM
b uttons . P ermits triggering
on
television
fiel d sig-
n als . TR IGG ER LEVEL control
s
h
ould b e rotated
fully countercloc kwise w hen triggering
on
TV
sig-
nals wit h
negative
going
sync and cloc kwise for
p ositive going
sync .
SG L SWP RE SE T- P ress in t h
e sp
ring-ret
u rn but-
ton momentarily to arm t h e trigger circuit
for α
sin-
gle-swee p dis p lay . In t h is mode, t h e trigger system
operates t he same
as
N O RM,
except only one
swee p is dis p layed for eac h trigger sig n
al
.
Anot
h
er
swee p can n ot b e dis p laye d u n til t he
SG
L SWP
RE SE T button is momentarily pressed in
agai
n
to
reset t he trigge r circuit . T h is mode is useful
for dis-
playi n g and p hotograph ing eit h er non r e p etitive sig-
n als or signals t h at cause u
nstable conventional
, .
dis p lays (e .g ., signals t h at vary in amplit
u de,
sh ap e, o r time) .
24

T
R IG'D- RE ADY I nd icato r - LE D illuminates w hen ei-
t h er Ρ - ΡAU TO or N O RM Trigger M ode is selected
and t he Swee p has been triggered (T R IG'D) .
In
single
swee p display, t he LE D illuminates to
indicate
t h
at t
h
e
Trigger circuit is arme d ( RE ADY) .
ί 5 TR IGG ER LEVEL Co n t r ol-Selects t h
e
amplitude
p oint on t he t r igge r signal
at
w h
ic
h
t
h
e swee p is
triggered
.
ίό

SL O PE Switc h -Selects t h e slope of t h e sig n al t h at
triggers t h e swee p .
O U T- Wh
en butto
n
is released out, swee p is
trig-
gered from t h e p ositive-goi ng slo p e of t h e trigger
signal .
IN-When button is pressed in, swee p is triggered
from t h
e negative-going slope of t
h
e trigger
signal .
2)

SO UR CE
Switch -Determi nes t he source of t he trig-
ger
sig n
al t
h
at is cou p led to t he i np ut of t h e trigger
circuit .
ΙΝΤ - P ermits trigge r
ing on sig n als t h at are a pp lied
to t he C H 1 OR Χ and
C
H 2
OR Υ i np ut connec-
tors .
T h
e source of t he inter n al signal is selecte d by
t h e ΙΝΤ switc h .
L I NE -T he power-so ur
ce waveform is t he source
of t he trigger signal . T h
is trigger source is u sef u l
w hen vertical input signals
a
r
e time related (multi-
p le or sub m u lti p
le) to t he f r e q uency of t he p ower-
in pu t
source voltage .
ΕΧΤ - P ermits t r iggering
on signals app lied to t h e
ΕΧΤ I NPU T connector
.
2$

ΙΝΤ Switc h -Selects t he sou rce of t he internal trig-
gering sig n al w hen t he SOUR C E switc h is set to INT .
CH 1-T he signal applied to t he C H 1
O
RΧ in p
ut
connector is t he sou rce of t h e trigge r sig n
al
.
VER T M OD E -T he inte rn al trigger source is deter-
mi ne d by t he signals selected for d is p lay by t he
VER TICA L M OD E switc hes . See Table 2-1 for
VER T M OD E trigger source .

Tektronix 2213A Specifications

General

Brand	Tektronix
Model	2213A
Category	Test Equipment
Language	English