<s>
4DTV	B-Device
is	O
a	O
proprietary	O
broadcasting	O
standard	O
and	O
technology	O
for	O
digital	O
cable	O
broadcasting	O
and	O
C-band/Ku	O
-band	O
satellite	O
dishes	O
from	O
Motorola	O
,	O
using	O
General	O
Instrument	O
's	O
DigiCipher	B-Device
II	I-Device
for	O
encryption	O
.	O
</s>
<s>
It	O
can	O
tune	O
in	O
both	O
analog	O
VideoCipher	O
2	O
and	O
digital	O
DCII	B-Device
satellite	O
channels	O
.	O
</s>
<s>
4DTV	B-Device
technology	O
was	O
originally	O
developed	O
in	O
1997	O
(	O
the	O
same	O
year	O
that	O
DigiCipher	B-Device
was	O
developed	O
)	O
by	O
General	O
Instrument/NextLevel	O
and	O
Motorola	O
,	O
now	O
a	O
division	O
of	O
ARRIS	O
.	O
</s>
<s>
The	O
4DTV	B-Device
format	O
is	O
contemporary	O
to	O
the	O
DVB-based	O
digital	O
television	O
broadcast	O
standard	O
but	O
its	O
completion	O
came	O
before	O
that	O
of	O
DVB	B-Application
and	O
thus	O
it	O
is	O
similar	O
but	O
incompatible	O
with	O
the	O
DVB	B-Application
standard	O
.	O
</s>
<s>
The	O
DigiCipher	B-Device
2	I-Device
encryption	O
system	O
is	O
used	O
in	O
digital	O
channels	O
much	O
like	O
the	O
VideoCipher	O
and	O
VideoCipher	O
II	O
systems	O
were	O
used	O
for	O
analog	O
encrypted	O
transmissions	O
.	O
</s>
<s>
By	O
the	O
time	O
when	O
analogue	O
VideoCipher	O
II	O
channels	O
are	O
switched	O
to	O
digital	O
,	O
all	O
of	O
the	O
remaining	O
VCII-encrypted	O
channels	O
(	O
excluding	O
in	O
the	O
clear	O
)	O
are	O
transitioned	O
to	O
DigiCipher	B-Device
II	I-Device
on	O
all	O
satellites	O
that	O
carries	O
either	O
in	O
the	O
clear	O
or	O
VideoCipher	O
II/II	O
+	O
/RS	O
-encrypted	O
channels	O
.	O
</s>
<s>
On	O
December	O
31	O
,	O
2010	O
,	O
Motorola	O
abandoned	O
support	O
for	O
4DTV	B-Device
after	O
13	O
years	O
when	O
it	O
was	O
developed	O
.	O
</s>
<s>
This	O
made	O
all	O
of	O
the	O
receivers	O
to	O
redirect	O
to	O
AMC-18	O
(	O
also	O
known	O
as	O
W5/X4	O
on	O
the	O
4DTV	B-Device
system	O
)	O
instead	O
of	O
its	O
of	O
other	O
satellites	O
that	O
carries	O
analog/VCII	O
channels	O
.	O
</s>
<s>
On	O
August	O
24	O
,	O
2016	O
,	O
at	O
9:18	O
AM	O
EST	O
,	O
Headend	O
In	O
The	O
Sky	O
(	O
the	O
provider	O
for	O
4DTV/DigiCipher	O
II	O
programming	O
)	O
transitioned	O
to	O
DVB-S2	O
(	O
MPEG-2/256	O
QAM	O
)	O
,	O
meaning	O
that	O
support	O
for	O
4DTV	B-Device
ended	O
on	O
that	O
date	O
.	O
</s>
<s>
4DTV	B-Device
is	O
designed	O
for	O
C-band/Ku	O
-band	O
based	O
satellite	O
dishes	O
(	O
both	O
TVRO/direct	O
-broadcast	O
)	O
in	O
conjunction	O
with	O
the	O
DigiCipher	B-Device
II	I-Device
system	O
(	O
for	O
digital	O
standard	O
definition/high	O
definition	O
signals	O
)	O
and	O
the	O
VideoCipher	O
II	O
system	O
(	O
for	O
analog	O
signals	O
)	O
.	O
</s>
<s>
4DTV	B-Device
receivers	O
were	O
designed	O
to	O
receive	O
analog	O
NTSC	O
(	O
except	O
the	O
DSR-905	O
)	O
in	O
the	O
clear	O
or	O
VideoCipherII	O
channels	O
and	O
feeds	O
,	O
as	O
well	O
as	O
digital	O
Digicipher	B-Device
2	I-Device
channels	O
as	O
a	O
TVRO	O
satellite	O
system	O
on	O
both	O
C	O
and	O
Ku	O
band-powered	O
satellite	O
dishes	O
.	O
</s>
<s>
The	O
HDD-200	O
is	O
a	O
peripheral	O
for	O
4DTV	B-Device
,	O
it	O
is	O
used	O
to	O
access	O
high	O
definition	O
channels	O
via	O
the	O
Mult-Media	O
Access	O
Port	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
National	O
Programming	O
Service	O
,	O
LLC	O
(	O
NPS	O
)	O
was	O
the	O
primary	O
provider	O
of	O
subscription	O
programming	O
to	O
4DTV	B-Device
and	O
C	O
band/Ku	O
band	O
users	O
.	O
</s>
<s>
The	O
HITS	O
services	O
use	O
the	O
Comcast	O
Subscription	O
Authorization	O
Center	O
(	O
SAC	O
)	O
for	O
the	O
channels	O
being	O
broadcast	O
on	O
the	O
AMC	O
18	O
satellite	O
located	O
at	O
105	O
degrees	O
West	O
(	O
W5	O
or	O
X4	O
tile	O
on	O
4DTV	B-Device
)	O
.	O
</s>
<s>
Due	O
to	O
the	O
removal	O
of	O
4DTV/DigiCipher	O
II	O
channels	O
on	O
August	O
24	O
,	O
2016	O
,	O
there	O
are	O
no	O
more	O
programming	O
providers	O
for	O
the	O
4DTV	B-Device
in	O
the	O
United	O
States	O
and	O
Canada	O
.	O
</s>
<s>
However	O
,	O
Shaw	O
Direct	O
still	O
offers	O
DigiCipher	B-Device
II	I-Device
programming	O
in	O
Canada	O
,	O
but	O
not	O
HITS	O
programming	O
.	O
</s>
<s>
The	O
4DTV	B-Device
makes	O
use	O
of	O
first-generation	O
digital	B-Algorithm
master	I-Algorithm
feeds	O
on	O
several	O
satellites	O
and	O
hundreds	O
of	O
channels	O
.	O
</s>
<s>
Being	O
a	O
C-band	O
system	O
,	O
the	O
4DTV	B-Device
has	O
the	O
advantage	O
of	O
signal	O
stability	O
,	O
great	O
satellite	O
footprint	O
and	O
no	O
rainfade	O
.	O
</s>
