HP 8110A Service Manual page 76

6 .
RE
CO
RD th
e de
l
ta t read
in
g .
Thi
s
i
s t
h
e r
i
se t
im e o
f th
e
re
f
ere
n ce s
i
g
n
a
l wi
t
hin
α 1 % ο
ampli t
u
de
win
do
w
o f t h
e s
i
g
n
a
l
co
nn
ected to
Inpu
t 4.
Thi
s
v
a
lu
e
i
s needed
l
ater to ca
l c
ul
ate t
h
e
correct
j
i
tter . (de
l
ta .t .
up
)
7. Se
l
ect t
h
e
Tim
e
b
ase
m
e
nu
a
n
d ce
n
ter t
h
e seco
n d
p
os
i
t
i
ve-go
in
g
edge o
f th
e s
i
g
n
a
l
(a
pp ro
xim
ate
D
e
l
a
y
= 52 ns)
8.
P
ress
M
O
RE
a
n
d
H
ISTOG
R
A
M
ι Se
l
ect t
h
e
Win do
w s ubm
e
nu
a
n
d set:
ι So
u
rce
i
s c
h
a
nn
e
l
4
ι
C
h
oose t
h
e
Tim
e
Hi stogra
m
ι
P
ress
W
I
N
DO
W M
A
RKER
1 a
n
d set
i
t to 245
mV
ι
P
ress
W
I
N
DO
W M
A
RKER
2 a
nd
set
i
t to 250
mV
9. Se
l
ect t
h
e
A
c
qui re s
ubm
e
nu,
set t
h
e
Numb
er o
f
Sa
mpl
es to 1000
a
n
d
p
ress STA
R
T ACQ
U
I
R
I
N
G
10 .
Af
ter t
h
e
d
ata
f
or t
h
e t
im
e
hi
stogra
m h
as
b
ee
n
ac
qui
red (#
Sa
mpl es = 100%), se
l
ect t
h
e
R
es
ul
t s
ubm
e
nu.
11 . Press ΜεΑΝ a
n
d SIG
M
A .
RE
CO
RD th
e
v
al
u
es o
f s i
g
m a
12 .
Th
e RM S-
j
i
tter
i
s ca
l
c
ul
ated as
f
o
ll o
w
s:
RM S -
j itter -_
6s igma - delta .t .up
6
13 .
Th
e
RM
S-
j
i
tter
f
or
p
er
i
od o
f
20 ns
i
s 20 .6 p s .
En
ter t
h
e res
ul
t
in
t h
e
T
est
R
e
p
ort as
TR
e
n
tr
y
6 .1b - 1
Testing t
h
e HP 8110 Α 3- 29