6
Block diagram
The following block diagram illustrates the functional principle of the board LIU:
mi
cr
o
cont
roll
er
R
S
232
in
te
rf
ac
e
LIU v2.0
lo
w
pa
ss
f
ilt
er
fr
am
e
r &
li
ne
i
n
te
rf
a
ce
de
vi
d
e
b
y
2
lo
w
p
as
s
fi
lt
er
lo
w
p
as
s
fi
lt
er
is
o
la
ti
o
n
is
o
la
ti
o
n
is
o
la
ti
o
n
is
o
la
ti
o
n
is
o
la
ti
o
n
is
o
la
ti
o
n
is
o
la
ti
o
n
is
o
la
ti
o
n
am
pl
if
ie
r
am
pl
if
ie
r
4
.09
6 M
H
z
10
M
H
z
fr
a
m
e
d
ou
tputs
T1.
403/G703-
9,
balanc
ed (
o
r
u
nbal
a
nced)
,
1.
544
M
bps
or
2.0
48 M
bps
st
a
ndar
d
f
re
quencies
0.
6Vr
m
s s
ine,
unb
alance
d
5
M
H
z and 10M
H
z
diple
xer
diplex
er
diplex
er
am
pl
if
ie
r
am
pl
if
ie
r
am
pl
if
ie
r
am
pl
if
ie
r
clock outputs
G
703-
13,
balance
d
15
44 kHz
or
2048
kH
z
clock outputs
G
703-
13,
unbalance
d
15
44 kHz
or
2048
kH
z
