Read Sharp ER-A490 (serv.man4) Service Manual online
3) Do
w
n
-l
o
a
d
in
g
matrix f
o
r
th
e sattel
ite
STATE
In
itia
l
Afte
r
s
e
n
d
in
g
A
C
K
Afte
r
s
e
n
d
in
g
NAK
EVENT
0
1
2
ID-ENQ
Sa
tell
ite
c
h
e
c
k
s
the
t
e
rmi
n
a
l No.:If i
t i
s
corre
c
t,
sate
lli
te
sen
ds ACK an
d
g
o
e
s
t
o
1
.
If it i
s
n
ot corre
c
t, Sa
tell
ite i
g
n
ore
s
th
e
ID-ENQ.
Sate
llite
che
c
k
s
t
h
e
t
e
rm
in
a
l No
.:If it i
s
c
o
rrect, s
a
tell
it
e
s
e
n
d
s
ACK a
n
d
g
o
es to 1
.
If it is no
t
c
o
rrect, Sate
llite
i
g
n
o
res the
ID-ENQ
.
—
ACK
—
—
—
NAK
—
—
—
EOT
—
After sate
llite
h
a
s
re
c
e
ived
TEXT, g
o
e
s
to
0.
(Norm
a
l e
n
d)
Befo
re sate
llite
h
a
s
re
c
e
ived
TEXT, ig
n
o
res the
E
O
T
Sate
lli
te g
o
e
s
to
0.
(ERROR END)
TEXT
—
Sate
llite
c
h
e
c
k
s
t
h
e
text b
lo
c
k
, if t
h
e
b
lo
c
k
is
corre
c
t,
Sate
llite
s
e
n
d
s
ACK a
n
d
g
o
es to 1
.
If
i
t i
s
n
o
t
c
o
rrect,
s
a
tell
ite sen
ds NAK an
d
g
o
e
s
to
2.
If
tra
nsm
is
sio
n
c
a
n
n
ot b
e
c
o
n
ti
n
u
e
d
,
sate
llite
sen
d
s
E
O
T
a
n
d g
o
e
s
to
0.
(ERRO
R END)
Sate
lli
te c
h
e
c
k
s
t
h
e
t
e
x
t b
lock
, i
f
th
e
b
lock
is c
o
rrect,
Sate
lli
te sen
ds ACK an
d
g
o
e
s
to
1.
If
i
t i
s
n
o
t
c
o
rrect,
s
a
te
llite
s
e
n
d
s
NAK a
n
d
g
o
es to 2
.
If tran
s
m
is
s
io
n
can
n
o
t
b
e
con
tinu
e
d
,
sate
lli
te s
e
n
d
s
E
O
T
a
n
d g
o
e
s
to
0.
(ERROR END)
T
IME-UP
—
Sate
llite
s
e
n
d
s
EOT, a
n
d
g
o
es to 0
.
(ERRO
R END)
Tim
e-u
p i
s
7
s
e
co
n
d
s
T
h
e
h
ost go
es to 0
.
(ERROR END)
Tim
e
-up
i
s
7
s
e
co
n
d
s
1 – 11
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