Tektronix 454A - Page 362

454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA‘ MOD 210 R , S, ¤ , & U

Al l Se r i al
Num b e r s
26 . C h ec k ‘ and
’ Swee p Ti mi ng Accu r ac y
± .
CHECK- - U si ng t he ‘ ¤™œ• / D I V swi t c h an
d t i me- ma r k gene r at o r
set t i ngs
gi ven i n Ta b l e 5- 2, c h ec k ‘ sweep
t i mi ng ove r t he mi ddl e ei g ht
di vi si o n s of
t h e di s p l a y . T h e . 02
u
s
t h r
oug
h . 5 p s set t i ngs s h oul d
be
wi t h i n 3% ( 0
. 24 ma j or di vi si on) , t
he
1
u s
t h r oug h 50 ms set t i ngs wi t
h i n
2% ( 0
. 16 ma j o r d i vi si on) , and t
h e . 1 s t h r oug h 5 s set t i ngs
wi t h i n 3%
( 0 . 24 ma j or di vi si on) .
b . Set t he HO R I Z D I S PL AY swi t c
h
t o
’ ( DEL AY E D S WEEP) .
c . C HE CK- - U si ng t
he ‘ an d ’ ¤™œ• / D I V swi t c h and t i me- ma
r k
gene r at or set t i ngs
gi ven i n Tabl e 5- 2, c h ec k ’ sweep
t i mi ng ove r t h e
mi dd l e ei g h t
d i vi si ons of t h e di spl a y . T h e . 02 ps t
h r oug h . 5 »¹ s set t i ngs
s h
oul d
b e wi t h i n 3% ( 0 . 24 ma j o r
d i vi si on) , t h e 1 ps t h r oug h 50 ms set t i ngs
wi t h i n 2% ( 0 . 16 ma j o r d i vi si on) ,
an d t h e . 1 s t h r oug h . 5 s set t i ngs
wi t h i n 3% ( 0 . 24 ma j o r di vi si on)
.
d . CA L I BR AT I ON - - See st eps 26, 27, 30, 31,
32, an d 33 of
Adj ust ment p r ocedu r e .
P ages 5- 21
& 5- 22

St ep 27, Ch ec k
‘
and
’ M agni f i e d Swee p Accu r ac y
REPL AC E :

T h e ent i r e st ep wi t
h t h e f ol l owi ng i nf o r mat i on :
27 . Ch ec k ‘ and
’ M agni f i e d Swee p Accu r ac y
± . C
h ange t he f ol l owi ng cont r ol set t i ngs :
MAG

X10
HO R I Z D I S PLAY

‘
Hor i zont al P OS
I T
I ON  Cent e r e
d
NOTE
Ch ange t he C H 1 VOL TS/ D I V swi t c h t o 50 m V an
d
use
t he
HF STA B cont r ol t o o b t ai n ± st a b l e di s p l a y of
t h
e
5 ns
ma
r k e r s .
b . C HE C K- - U si ng t
he ‘ ¤™œ• / D I V swi t c h and t i me- ma r k gener at o r
set t i ngs gi ven i n Ta b l e 5- 3, c
h
ec
k ‘ magni f i e d sweep t i mi ng ove r t h e
cent e r
ei g h
t
di vi si ons of t h e magni f i e d di spl a y . ( N ot e t h e po r t i ons of
t
h e
t ot al
magni f i e d sweep l engt h t o be excl ud ed f r om t
h
e
measu
r
ement . )
Magni f i e r l i g h t m u st b e on . T h e . 02 ps and . 05 us
set t i ngs s h oul d be
wi t h i n 4% ( 0 . 32 ma j o r di vi si on) ove r t he cent e
r ei g h t di vi si ons,
or
5%
( 0 . 10 ma j o r di vi si on) wi t h i n an y t wo di vi si on po
r
t i on of
t h e cent e
r
ei g ht
di vi si ons . The . 1 p s t
h r
oug
h . 5 ps set t i ngs s h oul d be wi t h i n 4% ( 0 . 32
ma j o r
di vi si on) , t h e 1 . 0 u s t h r oug h 50 ms set t i ngs wi t h i n 3% ( 0 . 24 ma j or
d i vi si on) , an d t h e . 1 s t h r oug h 5 s set t i ngs wi t h i n 6% ( 0 . 48 ma j or di vi si on)
ove
r
an
y p or t i on of t h e cent e r ei g h t di vi si ons . Fo r exampl e, t o c h ec k t
h
e
1 ms set t i ng :