<s>
The	O
terminator	O
is	O
usually	O
placed	O
at	O
the	O
end	O
of	O
a	O
transmission	O
line	O
or	O
daisy	B-Application
chain	I-Application
bus	B-General_Concept
(	O
such	O
as	O
in	O
SCSI	B-Architecture
)	O
,	O
and	O
is	O
designed	O
to	O
match	O
the	O
AC	O
impedance	O
of	O
the	O
cable	O
and	O
hence	O
minimize	O
signal	O
reflections	O
,	O
and	O
power	O
losses	O
.	O
</s>
<s>
Radio	O
frequency	O
currents	O
tend	O
to	O
reflect	O
from	O
discontinuities	O
in	O
the	O
cable	O
such	O
as	O
connectors	B-Protocol
and	O
joints	O
,	O
and	O
travel	O
back	O
down	O
the	O
cable	O
toward	O
the	O
source	O
causing	O
interference	O
as	O
primary	O
reflections	O
.	O
</s>
<s>
Types	O
of	O
transmission	O
line	O
cables	O
include	O
balanced	O
line	O
such	O
as	O
ladder	O
line	O
,	O
and	O
twisted	O
pairs	O
(	O
Cat-6	B-Protocol
Ethernet	I-Protocol
,	O
Parallel	O
SCSI	B-Architecture
,	O
ADSL	O
,	O
Landline	O
Phone	O
,	O
XLR	O
audio	O
,	O
USB	B-Protocol
,	O
Firewire	B-Protocol
,	O
Serial	O
)	O
;	O
and	O
unbalanced	O
lines	O
such	O
as	O
coaxial	O
cable	O
(	O
Radio	O
antenna	O
,	O
CATV	O
,	O
10BASE5	O
Ethernet	O
)	O
.	O
</s>
<s>
Forced	O
perfect	O
termination	O
(	O
FPT	O
)	O
can	O
be	O
used	O
on	O
single	O
ended	O
buses	O
where	O
diodes	O
remove	O
over	B-Algorithm
and	I-Algorithm
undershoot	I-Algorithm
conditions	O
.	O
</s>
<s>
All	O
parallel	O
SCSI	B-Architecture
units	O
use	O
terminators	O
.	O
</s>
<s>
SCSI	B-Architecture
is	O
primarily	O
used	O
for	O
storage	O
and	O
backup	O
.	O
</s>
<s>
An	O
active	O
terminator	O
is	O
a	O
type	O
of	O
single	O
ended	O
SCSI	B-Architecture
terminator	O
with	O
a	O
built-in	O
voltage	O
regulator	O
to	O
compensate	O
for	O
variations	O
in	O
terminator	O
power	O
.	O
</s>
<s>
Controller	B-Protocol
area	I-Protocol
network	I-Protocol
,	O
commonly	O
known	O
as	O
CAN	B-Protocol
Bus	I-Protocol
,	O
uses	O
terminators	O
consisting	O
of	O
a	O
120	O
ohm	O
resistor	O
.	O
</s>
<s>
10BASE2	O
networks	O
absolutely	O
must	O
have	O
proper	O
termination	O
with	O
a	O
50	O
ohm	O
BNC	B-Protocol
terminator	I-Protocol
.	O
</s>
<s>
If	O
the	O
bus	B-General_Concept
network	O
is	O
not	O
properly	O
terminated	O
,	O
too	O
much	O
power	O
will	O
be	O
reflected	O
,	O
causing	O
all	O
of	O
the	O
computers	O
on	O
the	O
bus	B-General_Concept
to	O
lose	O
network	O
connectivity	O
.	O
</s>
<s>
A	O
terminating	O
resistor	O
for	O
a	O
television	O
coaxial	O
cable	O
is	O
often	O
in	O
the	O
form	O
of	O
a	O
cap	O
,	O
threaded	O
to	O
screw	O
onto	O
an	O
F	B-Protocol
connector	I-Protocol
.	O
</s>
<s>
The	O
Digital	O
Equipment	O
Corporation	O
minicomputer	O
Unibus	B-Device
systems	O
used	O
terminator	O
cards	O
with	O
178Ω	O
pullup	O
resistors	O
on	O
the	O
multi-drop	O
address	O
and	O
data	O
lines	O
,	O
and	O
383Ω	O
on	O
the	O
single-drop	O
signal	O
lines	O
.	O
</s>
<s>
Terminating	O
resistors	O
values	O
of	O
78.7	O
ohms	O
2	O
watt	O
1%	O
are	O
used	O
on	O
the	O
MIL-STD-1553	O
bus	B-General_Concept
.	O
</s>
<s>
At	O
the	O
two	O
ends	O
of	O
the	O
bus	B-General_Concept
,	O
resistors	O
connect	O
between	O
the	O
positive	O
(	O
high	O
)	O
and	O
negative	O
(	O
low	O
)	O
signal	O
wires	O
either	O
in	O
internally	O
terminated	O
bus	B-General_Concept
couplers	O
or	O
external	O
connectorized	O
terminators	O
.	O
</s>
<s>
The	O
MIL-STD-1553B	O
bus	B-General_Concept
must	O
be	O
terminated	O
at	O
both	O
ends	O
to	O
minimize	O
the	O
effects	O
of	O
signal	O
reflections	O
that	O
can	O
cause	O
waveform	O
distortion	O
and	O
disruption	O
or	O
intermittent	O
communications	O
failures	O
.	O
</s>
