Tektronix 2235 Operator's Manual

P
reparatio n fo r Use-2235 ΑΝ /
US M -488 Operato r
s
2- 8
Β S E C/DI V -T
h e Β Swee p s pee d is set b y p
ulli ng

28 β DEL AY
TIME POSITION Cont r ol-Selects t he
out t he DL Y'D S WE EP
knob and rotating
it cloc k -

amo un t of d elay time
b etween t h e start ο # t h e Α
wise to α setti ng
o pp osite t he w h ite li ne scri
b ed on

Swee p an d t he start of t h
e Β Sweep . Delay ti m
e is
t he kn ob . T he Β
Sweep ci r cuit is used only
fo
r
varia b le from 0
.5
ti m
es to 10 times t he Α SE C/DI V
d elaye d -sweep operation .

switch setting .
SE C/DI V V a r ia b le Control
and Χ 10 M ag n ifie r
Switch-T he SE C/DI VV
a
r
iable control provi des con-
tinuously variable,
u
n
calibrate d Α and Β Sweep
spee ds to at least 2 .5 times
slowe r t han t he cali b rate d
setting . It exte nds t he slowest Α
Sweep spee d
to at
least 1 .25 s per division
.
To expan d t hec rt d is p lay b yα facto r
of 10, pull out
t
h
e Χ 10 M agnifier control (SEC/DI
VV aria b le con t r ol
k
nob) . T he d isplay portio n
of t he sweep will be 10
ti m
es faster t han t he Α and Β
SE C/DI V switc h
settings
. This allows α maxim u m
swee p sp ee d of 5 ns
per d ivisio n .
Push in t he
SEC/DI VV aria b le k nob to
regai n
t
h
e Χ 1 (no r mal) sweep sp ee
d .
UN CAL I nd icator-T h e LE D
illuminates to i n dicate
t h
at t he SE C/DI VV ariable
co n trol is o u t of t he cali-
b r ate d p osition .
POSITIO N Cont r ol-
Ho r izontally positio ns both t h
eΑ
Sweep an d t he Β Sweep
d isplays and h orizontally po-
sitions X-axis i n t he Χ - Υ mo d
e .
H O R I Z O N TA L M OD E
Switch -T hr ee- p osition switc h
d etermines t he
ma de of ope
r
ation for t he h orizontal
deflectio n system .
Α - Ho r izo n tal
d eflectio n is pr ovi de d b y t h e Α
Swee p generator at α
swee p spee dd eter m i n
ed by
t he Α SE C/DI V
switch setting .
A L T-Alte r nates t h
e h orizo
n
tal d is p lays b etween
t he Α Sweep (wit h
an
i n
te n sifie d zone) and t h
e Β
Delaye d Sweep . T h
e Α Sweep spee d is dete r mine d
by t he setting of t h e Α
SE C/DI V switc h . T h eΒ
Sweep s p eed an d t he lengt h
of the i n tensifie d zone
on t heΑ Sweep ore
bot h d etermine d b y t he Β
SEC/DI V switc h setti n g .
Β -Ho r izo n tal d eflection
is p rovide d by t h e Β
Swee p ge n erator at α
swee p speed d etermined by
t
h
e Β S E C/DI V switc h setting . T
he sta r t of t he Β
Sweep is d elayed from t h e start
of t
h
e Α Swee p b y
α time d ete r mi n e d by t he settings
of b ot h the Α
S E
C/DI
V
switc h and t h
e
Β
DEL AYTIME POSI-
TION con trol .
T
R IGG ER
R efe r to F ig u re 2-6 for locatio
n of items 29 t hr
oug h 38 .
Α T R IGG ER M od
e Switc h es-T h ree-sect i on switc h
t h at d eter m ines t he t r igge r
mo de for t he Α
Swee p .
Ρ - ΡAU TO-T V
L I N E- P ermits t r iggering on wave-
fo r ms and television
lines havi ng repetition r
ates of
at least 20
Hz . Swee p free-runs in t he
absence of
an a deq u ate trigge r
sig n al or w hen t h e r e p etition
rates are below 20 Hz . T
he ra n ge of t he Α T R IG-
G ERLEVEL control is r
est
r
icte d to t he
pea
k
-to-
p ea k range of t h e tr igge r
signal .
NO RM -Swee p
is
initiate
d wh en an ade q uate trig-
ger sig n al is a pp lie d .
In
t he
abse n ce of α trigger
sig
n al, no b aseline
trace will be present .
TV F I EL D-P r ess i n bot h Ρ - Ρ
A U TO an d NORM
bu ttons . Pe r mits triggering on
television fiel d sig-
n
als .
T
R IGG ER L EVEL
co
n
t
r
ol sh o u l d be r otated
fully
countercloc k wise whe n triggering
on T V sig-
nals with
negative-going sync and
cloc
k
wise for
positive-goi
n g
syn c .
Α / Β
S WP SE P Co n t r ol- V
ertically p ositio ns t he Β

α 976- οτ
Sweep trace wit h res p ect to the Α
Swee p trace w h
e
n
A LTH
O R IZO N TA L M OD E is
selecte d .

F ig
ur e 2-6 . Trigge r co n t r ols, connector, and i n
dicato r .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English