Tektronix 454A - Page 122

Per f or mance C h ec k - 454zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ‘ / R 454A
c . R emove t he gr ound st r a p f r om
bet ween t h e bi n d i ng
post s .
d . Connect t
h
e
medi um- f r e qu ency gener at or ( Type 191)
t o t
h
e
‘ • §¤ TR I G I NPU T connect or t h r oug
h t h e f i ve-
nanosecon d G R cabl e, 50- o h m i n- l i ne
t er mi nat i on and BN C
¤ connect or . Connect t h e o u
t p u t of t he BN C ¤ connect or
t o t he – AXI S I NPU T bi n
d i ng post s t h r oug h ± 42- i nc h BN C
cabl e an d t he BN C t o
al l i gat or cl i p ad ap t er . ( Connect
bl ac k
l ea d of al l i gat or
cl i p
a
d a p t er t o gr o und p ost . )
e . Set t h e
me
d
i um- f r e q uency gener at or f or f i ve- vol t
out -
p ut at 50
k i l o h er t z ( use cal i br at e d p osi t i on
of gener at or

j .
Di sconnect al l t est e q ui p me
n t an d r e p l ace gr ound
am p
l i t u d e cont r ol ) .

st r a p .
b . Set
t h
e
I N T EN SI TY cont r ol t o ± nor mal set t i ng .

f . C HE CK - C
R T di s p l ay f or not i ceabl e i nt ensi t y mo
d
u
l a-
t i on . T h e I NT
EN SI TY cont r ol set t i ng may nee d t o
be
r e
d
uce
d t o vi ew t r ace mo d u l at i on .
N OTES
g . Set t he
const ant - am p l i t ude gener at or f or f i ve- vol t
out -
p ut at 50 mega
h er t z ( u se cal i br at e d posi t i on
of gener at or
am
p l i t u d e cont r ol ) .
h . Set t he ‘ an d ’ ¤™œ•
/ DI V swi t c h t o 0 . 05 ¼ s .
i . C HE C K - C R T di spl ay f or
not i ceabl e i nt ensi t y modul a-
t i on . T he I N T EN SI TY
cont r ol set t i ng may need t o be
r e d uced t o vi ew t r ace mod u
l at i on .