Tektronix 2213A Operator's Manual

3 . Set t h e appropriate V O L TS/DI V switc h and variable
control for an exact 5- d ivision d is p lay .
4 . V e r tically position t h e trace so t h at t h e zero reference
of t he waveform touc h es t he 0% graticule li ne an d t he to p of
t he waveform touc hes t he 100% gratic u le line .
5 . H orizo n tally p osition t he d isplay so t he 10% p oint on
t h e waveform intersects t h e second vertical graticule line .
6 . M easu re t h e h orizontal distance betwee n t he 10%
and
90% points ( b etween P oints Α and Β of F igure 4-6) and
calculate t h e time duration using t h e following formu la :
h orizontal SE C/DI V
distance
χ switc h
R ise (divisions) setti n g
Time =
magnification factor
E xam p le : T he h orizontal distance between t h e 10% an d
90% p oints is 5 divisions, and t he S E C/DI V switc h is set
to 1 μ s p er division . T h e X10 magnifier k no b is off ( k no b
i n) .
Su b stituting t he given values in t he formula :
R ise
Time

-

5
div χ; μ s/div

-

5
μs
Time Difference B etween Pu lses On Time- R elate d
Signals
T he calibrated swee p sp eed and dual-trace features of
t h e 2213 Α allow measurement of t he time difference be-
tween two se p arate events . To measure time differe n ce,
u se t h e followi n g p rocedure :
1 . P reset instrument controls and obtain α b aseline
trace, t hen set t he TR IGG ER SOUR C E switc h to C H 1 .
2 . Set both In p ut Coupling switc hes to t he same p osi-
tion, de p end ing on t he ty p e of input coupling desired .
3 . U sing eit h er pro b es or cables wit h eq ual tine delays,
connect α k nown reference signal to t h e C h annel 1 in p ut
and t h e com p arison signal to t he C h a nn el 2 i np ut .
4 . Set both VO LTS/DI V switc hes for 4- or 5-division
d isplays .
5 .
Select BOTH VER TICA L M OD E ; t h en select eit h er
A L T or C H O P , depending on t he fre q uency of input signals .
6 . If t he two sig n als are of op p osite p olarity, p ress i n t he
C h annel 2 I NVER T b utton to invert t he C h annel 2 display
(signals may b e of opposite polarity d ue to 180° p hase
difference) .
7 . A d j ust t h e TR IGG ER LEVEL control for α stable
dis p lay .
8 . Set t h eSE C/DI V switc h to α swee p speed w h ic h pro-
vides t h ree or more divisions of h orizo n tal separation
be-
tween t he reference p oints on t h e two d isplays . Ce n ter eac h
of t he dis p lays ve r tically (see F igure 4-7)
9 . M easure t he h orizontal difference b etween t he two
sig n al reference p oints and calculate t he time difference us-
ing t he following formula :
SE C/DI V h orizontal
switc h χ difference
Time setti ng (divisio n s)
Difference =
magnification factor
E XAMPLE : T h
e S
E
C/DI V switc h is set to 50 μ s p er divi-
sion, t h
e
Χ 10 M
ag
n ifier
is on
(
bu tton out) and t he h ori-
zontal difference
between waveform measurement
points is 4 .5 divisions .
S ub stit u ting t h
e give
n
values
in
t h e formula :
Time
Difference

-

50 μ s/di1 0χ 4 .5 div

_

22 .5 μs

Tektronix 2213A Specifications

General

Brand	Tektronix
Model	2213A
Category	Test Equipment
Language	English