Tektronix 454A - Page 135

P er f or mance C h ec k - 454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ‘ / R 454A
g . C HE
CK - F i f t h mar k er wi t h i n 0 . 1 d i vi si on ( wi t h
i n
5%)

NOTE
of t he
f our t h - d i vi si on ver t i cal l i ne .
Change t he CH 1
VOL
TSI DI V
swi t ch t o 50 mV and
use t he HF STAB cont r ol t o
obt ai n ± st abl e di spl ay of
h . Cont i nue t h i s c h ec k f or eac h
t wo- di vi si on por t i on of

t
he f i ve- nanosecond mar ker s .
t he swee p wi t h i n t he cent er ei g h t d i vi si o n s of t he gr at i cul e
.
i .
Set t he HO R I Z DI S PL AY swi t c h t o ’ ( D EL AY E D
S WEEP) .
j . C HE CK - U si ng t h e ‘ and ’ ¤™œ• / DI V
swi t c h and
t i me- mar k gener at or set t i ngs gi ven i n Ta b l e 5- 2, ch
ec
k
’
sweep t i mi ng wi t h i n 0 . 25 di vi si on over t he mi dd l e ei g h t
d i vi si ons of t he di s p l ay
( wi t h i n 3° / ¿ ) .
‘ an d ’
TI ME/
DI V
Swi t ch
Set t i ng
TA BLE 5- 3
‘ an d ’ M agni f i e
d
Accur acy
Ti me-

CR T

P or t i ons of
Mar k  Di s p l ay

t ot al magni f i e d
Gener at or

( M ar k er s/

sweep l engt h
Out p ut

Di vi si on)

t o excl u d e
f r om
measur ement
k .
Set t he t i me- mar k gener at or f or one- mi l l i secon d
mar k er s .

. 02 ¼ s

5 n anosecon d  1 cycl e/

Fi r st 25 di vi si ons
2 1/ 2 di v

an d
al l beyon d
t he 100t h
™. Set t h e ‘ an d ’ ¤™œ• / DI V swi t c h t o 1 ms
.

d i vi si on
m . P osi t i on t he secon d mar k er t o t h e f i r st - d
i vi si on
ver t i cal l i ne .
· . C HE CK - F our t h mar k
er
wi t h
i n 0 . 1 di vi si on ( wi t h i n
5° / ¿ ) of t he t h i r d - d i vi si on ver t i cal l i ne .
¿ . P osi t i on t he t h i r d mar k
er t o t he second - d i vi si on
ver t i cal l i ne .
. 05 ¼ s 1

5
nanosecond  1

1
. 1 ¼ s 1
10 nanosecon d  1

1
. 2 ¼ s 1 10 nanosecon d  1

2
. 5 ¼ s

50 nanosecon d
 1
Á . C
HE C K- F i f t h mar k er wi t h i n
0 . 1 d i vi si on ( wi t h i n 5%)

1
¼ s

0 . 1 mi cr osecon d  1
of t h e f o u r t h - d
i vi si on ver t i cal l i ne .

–¼ s

0 . 1 mi cr osecond

2
5
¼
s

0 . 5 mi cr osecond

1
l ops

1 m
i cr osecon d  1
q .
Cont i nue t h i s c h ec k f or eac h
t wo- di vi si on por t i on of

20 ¼ s

1 mi cr osecon
d  2
t he swee p wi t h
i n t he cent er ei g h t di vi si ons
of t h e gr at i c u l e .

50 ¼ s

5 mi cr osecon d
 1
. 1 ms

10 mi cr osecon d  1
. 2 ms

10 mi cr osecon d  2
r .
CA
L
I BRATI O N - See st e p s 26, 27,
30, 31, 32 an d 33

. 5 ms

50
mi cr osecon d  1
of A d j u st ment
pr ocedur e .

1 ms 0 . 1 mi l l i secon d
 1
2 ms 0 . 1 mi l l i secon d  2
27 . C h ec k ‘ ar i d ’ M agni f i e d
Swee p Accur acy

5 ms
0 . 5 mi l l i secon d  1
10 ms

1 mi l l i second

1
± . Set t he MAG
swi t c h t o § 10 .

20 ms

1 mi l l i secon d  2
50 ms

5 mi l l i second

1
b . C HE
CK - U si ng t he ‘ ¤™œ• / DI V
swi t c h and t i me-

. 1 s

10 mi l l i secon d  1
mar k gener at or
set t i ngs gi ven i n Ta b l e 5- 3, c h ec k ‘
magni -

. 2 s

10 mi l l i secon d
 2
f i e d sweep t i mi ng wi t h
i n 0 . 32 d i vi si on over t h e mi dd l e ei g h
t

. 5s

50 mi l l i secon d  1
di vi si ons of t he magni f i e d d i s p l ay ( wi t h
i n 4° / ¿ ) . Not e t h e

1
s

0 . 1 secon d  1
por t i ons of t he t ot al magni f i e
d sweep l e n gt h t o be excl ud
e
d

2
s

0 . 1 secon d  2
f r om
t
h
e measur ement . Magni f i er l i g h t m u st
be on .

5 s

0 . 5 secon d  1
Fi r st 10 di vi si ons
an d al l beyon d
t h e 100t h
di vi si on
Fi r st 5 di vi si ons
an d al l beyond
t he 100t h
di vi si on .
Fi r st 2
. 5 di vi si ons
an d
al l beyon
d
t he 100t h
d i vi si on .
5- 2 1