Campbell 21X Manuale dell'Operatore Pagina 173

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Vedere la pagina 172
T2
=
shift left
(Ss(n))
+ carry
4.
Form the new
low signature
byte
by adding
the results
of operation
3 to the
old high
signaturE byte
and
the transmitted
byte.
lgnore arpy
carry bits
resulting
from
these
add opergtions.
Se(rf+1)
=Tz*
51(n)
+ M(n+1)
As each
new
transmitted
byte
is. received,
the
procedure
is
pepeated.
APPENDIX C. BINARY
TELECOMMUNICATIONS
lr
|
,r
=
Sr(n)
I
S1(n+1)= So(n)
t''
I
3.
Form a tpmporary
byte
by
shifting
the
old
low
sign{ture
byte
one bit
to
the
left
and
adding afy
carry
bit which results
from the
shift opefation.
A
"shift
left"
is
identicalto a
multiply
$y
2. lgnore any
carry
bit resulting
from the
hdd.
c-5
Vedere la pagina 172
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