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3-26
Testi
n
g t
h
e HP 8110Α
ι Press t h e
PRE
CIS
E E
DG
E F
I
N
D key
5 . RE CO RD
t
h e de l ta t reading. Thi s is t he rise time of t he
reference s i g n al wit hin α 1% ο ampli t ude win dow
o
f t he signal
connected to Input 4. Thi s value is needed
l
ater to calculate the
correct
j
i tter. (delta.t . up)
6 . Select the Timeb ase
m
enu and center t he seco n d
p
osit ive-going
edge of t he sign al (approximate
D
elay = 82 .35 ns)
7 . Press
and
ι Se l ect t h e Win dow subm enu
a
nd set :
ι Source i s ch ann el 4
ι C h oose th e Tim e Histogra m
ι P ress
W
I
N
DO
W M
A
RKER
1 and set it to 245 mV
ι P ress (WINDOW
MARKER-2
a
nd set it to 250 mV
8 . Se lect th e A cqui re submenu, set th e Numb er of Samples to 1000
an d press STA
R
T ACQ
U
I
R
I
N
G]
9 . After the data
f
or the t ime histogram has
b
een acqui red (#
Sampl es = 100%), se l ect th e
R
esult subm e nu.
10 . Press ηπεΑΝ a n d SIG
M
A . RE CO RD t he values o f sigm a
11 . Th e RM S-
j
i tter i s cal culated as follows :
RM
S
-
,
f
i
tte
r
= 6s
i
g
m
a - de
l
ta .t .
up
6
12 . Th e RM S-
j
itter
f
or
p
eriod o f 50 ns is 50
p
s . Enter the result in
the
T
est
R
ep ort as TR entr y 6.1 α - 1
13 . Set th e HP 8110Α
p
er iod to 500 ns
14 .
R
ep eat step s 6 to 11
Note
Ι
ΤΙΜΕ/ DIV = 200
p
s/div; approxi mate D e lay = 532 ns
15 . Th e RM S-
j
itter
f
or
p
er iod of 500 ns is 175
p
s. Enter the result in
t h e
T
est
R
ep ort as TR entr y 6.1 α - 2
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