Tektronix 454A - Page 141

Eq ui
p ment R e q ui r ed
1 . Test Osci l l osco p e

4 . Cu r r ent P r o be W i t h P assi ve Ter mi nat i on ( Te kt r oni x
Ty pezyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA¡ 6021 W i t h 011- 0105- 00 P assi ve Ter mi nat i on) .
2 . Ti me-
M
ar
k Gener at or ( Ty p e 2901)
3 . St an d ar d Am p l i t u d e Cal i b r at or ( 067- 0502- 01)

6 . 18- I nc h 50
©
BN C Cabl e
Cont r ol Set t i ngs

b . Set t he ‘ T RI GG ER I NG LEVEL cont r ol so
al l
of t h
e
l ea d i ng e d ge of t he wavef or m i s vi si b l e .
P
r eset i nst r ument
cont r ol s t o t he set t i ngs gi ven i n t he
P
r el i mi nar y
P r oce d u r e .
38 . C heck Cal i br at or R ep et i t i on R at e
± . Set t he
C H 1
an
d CH 2 V
O
L TS/ DI V swi t c h es t o . 5,
t
h e ™• ¤ TR I G swi t c h t o N O RM, t h e ‘ an d ’ ¤™œ• / DI V
swi t c h es t o . 1 ms an d t h e ver t i cal M OD E swi t c h t o A L T .
b . Connect 1- mi l l i second t i me mar k er s t o t he C
H
2 i np u t
connect or t h r o ug h ± 42- i nc h 50
©
BN C
cabl e
.
µ . Connect t he 1 V CA L 1 kH z connect or t o t h e CH 1
connect or t h r oug h an 18- i nc h 50 © BN C cabl e .
d . P
osi t i on t he di s p l ay so
t h
e
t i p s of t h e t i me mar k er s
f al l j u st bel ow t h e r i si ng por t i ons of t he s qu ar e wave .
e . U si ng t he h or i zont al
P
OSI TI O
N cont r ol , set
t h
e r i si ng
p or t i on of t he secon d cal i b r at or cycl e t o t he cent er ver t i cal
gr at i c u l e l i ne .
f . Set t h e M AG Swi t c h t o § 10
.
g . C HE CK - Se p
ar at i on
bet wee
n t he cal i br at or wavef or m
l ea d i ng edge and t he t i me mar k er l ea d i ng edge s h oul d
not
excee d 0 . 5 d i vi si on ( 0 . 5%acc u r acy) .
h . CA L I BR ATI O N- See st e p 6 of A d j u st ment p r o-
cedur e .
39 . C h ec k Cal i br at or W avef or m R
i set i me
O UT PU T SI G
NA LS C HE C K
5 . 42- I nc h 50
©
BN C Ca b l e
c . P osi t i on t he 10%
poi nt of t he l ea d i ng e dge t o ±
ver t i cal gr at i cul e l i ne .
d . C HE C K- C RT d i s p l ay f or f i ve di vi si ons or l ess b e-
t ween t he 10% ¿ an d 90% p oi nt s on t h e l ea d i n g e d ge of t he
cal i br at or
wavef or m ( one mi cr osecon d or l ess, r i set i me) .
e . Di sconnect ±™™ t est e qu i pment .
P er f or mance C hec k - 454 ‘ / R 454A
40 . C h ec k Cal i br at or V ol t age Out
put
± . Set t h e ‘ an d ’ ¤™œ• / DI V swi t c h t o 5 ms, t h e C H 1
V O L TS/ DI V swi t c h t o . 1 and t he ‘ T RI GG ER I NG
SO UR CE swi t c h t o L I NE .
b . Con nect t he 1 V CA L 1 kH z connect or t o t he un-
known i nput connect or of t h e st an d ar d am p l i t ude cal i b r a-
t or ( 067- 0502- 01) wi t h ± 42- i nc h 50 © BN C cabl e .
µ . Set t he st an d ar d am p l i t u d e cal i b r at or f or ± p osi t i ve,
one- vol t
DC
o
u t p u t i n t he c ho pped mo d e .
d . Connect t he st an d ar d am p l i t ude cal i br at or o u t p u t t o
t h e I NPU
T
CH 1
connect or
.
e . Set t h e ‘ LEVEL cont r ol f or ± st a b l e di spl ay .
f . P osi t i on t h
e
t o p
of t h e wavef or m on t he di s p l ay ar ea
wi t h t h e C H 1 P OSI TI ON cont r ol .
± . Set t he ver t i cal M OD E swi t c h t o CH 1, t he C H 1

g . C HE CK - Di f f er ence b et ween t he st an d ar d ampl i t ud e
V O L TS/ DI V swi t c h t o . 2, t he ‘ ¤™œ• / DI V swi t ch t o . 2 ¼
s

cal i b r at or o u t p u t l evel
an
d
t h e 454 ‘ cal i br at or out p u t 0 . 1
an d t he M AG swi t ch t o O FF .

d i vi si on or l ess ( one vol t , ±1% ¿ ) .