Tektronix 454A - Page 138

Per f or mance C h
ec
k
- 454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ‘ / R 454A
30 . C h ec k Del ay- Ti me J ¯ t t er

d . M ove t he t ent h mar k er t o t he cent er
ver t i cal gr at i c u l e
l i ne wi t h t h e h or i zont al P OSI TI O N cont r ol
.
5- 24
± . C h ange
t
h
e f ol l owi ng cont r ol set t i ngs :
DELAY- TI ME MUL TI PL I ER 1 . 00
‘ ¤™œ• / DI V  1 ms
’ ¤™œ• / DI V
 1 ¼ s
A VARI ABLE

CA L
b . P osi t i on t h e p ul se near t h e cent er of t he d i s p l ay ar ea
wi t h t he DELAY- TI ME MUL TI PL I ER d i al .
c . C HE C K - J i t t er on t h e l ea d i ng ed ge of t he pul se s h oul d
not exceed 0 . 5 d i vi si on ( 1 p ar t i n 20, 000) . Di sr egar d sl ow
d r i f t .
b . Set t he H O
R I Z DI S PL AY swi t c h t o ‘ and t he
DELAY- TI ME
MUL TI PL I ER d i al t o 10 . 00 .
µ .
C HE CK - Ti mi ng b et ween t h e second and
t he t ent h
mar k er s . R ecor d any t i mi ng er r or
f or
use
i n p ar t e .
e . C HE C K - ‘ swee p l engt h
must
b
e at l east 10 d i vi si ons .
f . R
eposi t i on t he f i r st mar k er t o t he l ef t gr at i c u l e l i ne .
g . T u r n t he ‘ S WEEP LEN GT H cont r ol
t o
4
DI
V
( not i n
’ EN DS ‘ d et ent ) .
h . C HE C K - ‘ sweep l engt h m u st be f o u r di vi si ons or
l ess .
33 . C h ec k ’ En d s ‘ O p er at i on
d .
T
u r n t h e DELAY- TI ME MUL TI PL I ER d i al t o 9 . 00
an d a dj u st so t h e p u l se i s d i s p l ayed near t he cent er of t he

± . Set t h e ‘ ¤™œ• / DI V swi t c h t o 1 ms, t he ’ ¤™œ• / DI
V
di s p l ay ar ea .

swi t c h t o . 1 ms, t he ’ S WEEP
M
OD
E swi t c h t o ’ STA R
TS
A F T ER D EL
AY TI ME,
t he H O R I Z DI S PL AY swi t c h t o ‘
™• ¤• • D UR I NG ’ , an d t he ‘ S WEEP LEN GT H cont r ol t o
e . C HE CK - J i t t er on l ea d i ng edge of t h e p ul se
s h oul d

’ EN DS ‘ .
not excee d 0 . 5 d i vi si on
. Di sr egar
d
sl ow d r i f t .
b . R ot at e t he DELAY- TI ME MUL TI PL I ER di al t h r oug h -
31 . C h ec k M i xe d Swee p O p er at i on

ou t i t s r ange .
± . Set t he ‘ ¤™œ• / DI V swi t c h t o
1
ms an
d
t
h
e
’
TI ME/
DI V swi t c h t o . 5 ms .

µ . C HE CK - C R T d i spl ay en d s af t er t he i nt ensi f i ed
p or t i on at al l DELAY- TI ME MUL TI PL I ER d i al set t i ngs .
34 . C h ec k ‘ an d ’ V ar i abl e Cont r ol R ange
± . Set t he ‘ an d ’ ¤™œ• / DI V swi t c h es t o 1
ms, t
h
e
H O R I Z DI S PL AY swi t c h t o ‘ an d t he S WEEP LEN GT H
cont r ol t o FULL .
d . Set t he H O R I Z DI S PL AY swi t c h t o M I X E D .

b . Set t he t i me- mar k gener at or f or 10 ms t i me mar k er s .
e .
C
HE
CK - Ti mi ng
b et ween secon d and
t ent h
mar k
er
wi t h i n 0 . 16 d i vi si on ± t he ‘ sweep er r or not e d i n p ar t c
( wi t h i n 2% ± measur e d ‘ sweep er r or ) .
32 . C h ec k ‘ Swee p L engt h
± . Set t h e
H
O
R
I Z
DI S
PL
AY swi t c h t o ‘ an d t he ‘
¤™œ• / DI V swi t c h t o 1 ms .
µ . Set t he ‘ T R I GG
ER I N
G
LEVEL cont r ol f or
± st a
b
l e
d i s p l ay .
d . P osi t i on t h e mar k er s t o t he f ar r i g h t an d l ef t gr at i cul e
l i nes wi t h t he h or i zont al
P
OSI TI O N cont r ol
.
e . T u r n t he ‘ V A R cont r ol f u l l y co u nt er cl oc k wi se .
b . Set t he t i me- mar k gener at or
f or
1- mi l l i second
mar k er s .

f . C HE CK - C R T di s p l ay
f or f o u r d i vi si ons maxi m u m
s p aci ng bet ween
mar k er s ( i ndi cat es a d e qu at e r ange f or
cont i nuousl y
var i abl e swee p r at e b et ween t he cal i b r at e d
c . Set t h e ‘ T R I GG ER I NG LEVEL cont r ol f or ± st a
b
l e

st e p s) .
UNCA L ‘ OR ’ l i g h t must b e on w h en ‘ VA R
d i s p l ay .

cont r ol
i s
not
i n
d et ent p osi t i on .