<s>
The	O
BNC	B-Protocol
connector	I-Protocol
(	O
initialism	O
of	O
"	O
Bayonet	B-Protocol
Neill	I-Protocol
–	I-Protocol
Concelman	I-Protocol
"	O
)	O
is	O
a	O
miniature	O
quick	O
connect/disconnect	O
radio	B-Protocol
frequency	I-Protocol
connector	I-Protocol
used	O
for	O
coaxial	O
cable	O
.	O
</s>
<s>
The	O
BNC	B-Protocol
connector	I-Protocol
features	O
two	O
bayonet	O
lugs	O
on	O
the	O
female	O
connector	O
;	O
mating	O
is	O
fully	O
achieved	O
with	O
a	O
quarter	O
turn	O
of	O
the	O
coupling	O
nut	O
.	O
</s>
<s>
BNC	B-Protocol
connectors	I-Protocol
are	O
made	O
to	O
match	O
the	O
characteristic	O
impedance	O
of	O
cable	O
at	O
either	O
50	O
ohms	O
or	O
75	O
ohms	O
(	O
with	O
other	O
impedances	O
such	O
as	O
93	O
ohms	O
for	O
ARCNET	B-Protocol
available	O
though	O
less	O
common	O
)	O
.	O
</s>
<s>
BNC	B-Protocol
connectors	I-Protocol
are	O
used	O
with	O
miniature-to-subminiature	O
coaxial	O
cable	O
in	O
radio	O
,	O
television	O
,	O
and	O
other	O
radio-frequency	O
electronic	O
equipment	O
.	O
</s>
<s>
They	O
were	O
commonly	O
used	O
for	O
early	O
computer	O
networks	O
,	O
including	O
ARCnet	B-Protocol
,	O
the	O
IBM	B-General_Concept
PC	I-General_Concept
Network	I-General_Concept
,	O
and	O
the	O
10BASE2	O
variant	O
of	O
Ethernet	O
.	O
</s>
<s>
The	O
BNC	B-Protocol
connector	I-Protocol
is	O
used	O
for	O
signal	O
connections	O
such	O
as	O
:	O
</s>
<s>
The	O
BNC	B-Protocol
connector	I-Protocol
is	O
used	O
for	O
analog	O
composite	O
video	O
and	O
digital	B-Protocol
video	I-Protocol
interconnects	O
on	O
commercial	O
video	O
devices	O
.	O
</s>
<s>
Consumer	O
electronics	O
devices	O
with	O
RCA	B-Protocol
connector	I-Protocol
jacks	O
can	O
be	O
used	O
with	O
BNC-only	O
commercial	O
video	O
equipment	O
by	O
inserting	O
an	O
adapter	O
.	O
</s>
<s>
BNC	B-Protocol
connectors	I-Protocol
were	O
commonly	O
used	O
on	O
10base2	O
thin	O
Ethernet	O
network	O
cables	O
and	O
network	B-Protocol
cards	I-Protocol
.	O
</s>
<s>
The	O
connector	O
was	O
named	O
the	O
BNC	O
(	O
for	O
Bayonet	B-Protocol
Neill	I-Protocol
–	I-Protocol
Concelman	I-Protocol
)	O
after	O
its	O
bayonet	O
mount	O
locking	O
mechanism	O
and	O
its	O
inventors	O
,	O
Paul	O
Neill	O
and	O
Carl	O
Concelman	O
.	O
</s>
<s>
Neill	O
worked	O
at	O
Bell	O
Labs	O
and	O
also	O
invented	O
the	O
N	B-Protocol
connector	I-Protocol
;	O
Concelman	O
worked	O
at	O
Amphenol	O
and	O
also	O
invented	O
the	O
C	B-Protocol
connector	I-Protocol
.	O
</s>
<s>
BNC	B-Protocol
connectors	I-Protocol
are	O
most	O
commonly	O
made	O
in	O
50	O
and	O
75	O
ohm	O
versions	O
,	O
matched	O
for	O
use	O
with	O
cables	O
of	O
the	O
same	O
characteristic	O
impedance	O
.	O
</s>
<s>
Video	O
(	O
particularly	O
HD	O
video	O
signals	O
)	O
and	O
DS3	O
Telco	O
central	O
office	O
applications	O
primarily	O
use	O
75	O
ohm	O
BNC	B-Protocol
connectors	I-Protocol
,	O
whereas	O
50	O
ohm	O
connectors	O
are	O
used	O
for	O
data	O
and	O
RF	O
.	O
</s>
<s>
Many	O
VHF	O
receivers	O
used	O
75	O
ohm	O
antenna	O
inputs	O
,	O
so	O
they	O
often	O
used	O
75	O
ohm	O
BNC	B-Protocol
connectors	I-Protocol
.	O
</s>
<s>
The	O
SHV	B-Protocol
connector	I-Protocol
is	O
a	O
high-voltage	O
BNC	O
variant	O
that	O
uses	O
this	O
reverse	O
polarity	O
configuration	O
.	O
</s>
<s>
Smaller	O
versions	O
of	O
the	O
BNC	B-Protocol
connector	I-Protocol
,	O
called	O
Mini	O
BNC	O
and	O
High	O
Density	O
BNC	O
(	O
HD	O
BNC	O
)	O
,	O
are	O
manufactured	O
by	O
Amphenol	O
.	O
</s>
<s>
and	O
a	O
75ohm	O
and	O
a	O
50ohm	O
BNC	B-Protocol
connector	I-Protocol
which	O
both	O
comply	O
with	O
the	O
2007	O
IEC	O
standard	O
,	O
IEC	O
61169-8	O
,	O
will	O
mate	O
non-destructively	O
.	O
</s>
<s>
BNC	B-Protocol
connectors	I-Protocol
were	O
thus	O
originally	O
made	O
only	O
in	O
50ohm	O
versions	O
,	O
for	O
use	O
with	O
any	O
impedance	O
of	O
cable	O
.	O
</s>
<s>
A	O
BNC	B-Protocol
inserter/remover	I-Protocol
tool	I-Protocol
also	O
called	O
a	O
BNC	B-Protocol
tool	I-Protocol
,	O
BNC	O
extraction	O
tool	O
,	O
BNC	O
wrench	O
,	O
or	O
BNC	B-Protocol
apple	I-Protocol
corer	I-Protocol
,	O
is	O
used	O
to	O
insert	O
or	O
remove	O
BNC	B-Protocol
connectors	I-Protocol
in	O
high	O
density	O
or	O
hard-to-reach	O
locations	O
,	O
such	O
as	O
densely	O
wired	O
patch	B-Protocol
panels	I-Protocol
in	O
broadcast	O
facilities	O
like	O
central	O
apparatus	O
rooms	O
.	O
</s>
<s>
BNC	B-Protocol
tools	I-Protocol
are	O
usually	O
light	O
weight	O
,	O
made	O
of	O
stainless	O
steel	O
,	O
and	O
have	O
screw	O
driver	O
type	O
plastic	O
handle	O
grips	O
for	O
applying	O
torque	B-General_Concept
.	O
</s>
<s>
They	O
help	O
to	O
safely	O
,	O
efficiently	O
and	O
quickly	O
connect	O
and	O
disconnect	O
BNC	B-Protocol
connectors	I-Protocol
in	O
jack	B-Protocol
fields	I-Protocol
.	O
</s>
<s>
BNC	B-Protocol
tools	I-Protocol
facilitate	O
access	O
and	O
minimize	O
the	O
risk	O
of	O
accidentally	O
disconnecting	O
nearby	O
connectors	O
.	O
</s>
<s>
Similar	O
connectors	O
using	O
the	O
bayonet	O
connection	O
principle	O
exist	O
,	O
and	O
a	O
threaded	B-Protocol
connector	I-Protocol
is	O
also	O
available	O
.	O
</s>
<s>
United	O
States	O
military	O
standard	O
MIL-PRF-39012	O
entitled	O
Connectors	O
,	O
Coaxial	O
,	O
Radio	O
Frequency	O
,	O
General	O
Specification	O
for	O
(	O
formerly	O
MIL-C-39012	O
)	O
covers	O
the	O
general	O
requirements	O
and	O
tests	O
for	O
radio	B-Protocol
frequency	I-Protocol
connectors	I-Protocol
used	O
with	O
flexible	O
cables	O
and	O
certain	O
other	O
types	O
of	O
coaxial	O
transmission	O
lines	O
in	O
military	O
,	O
aerospace	O
,	O
and	O
spaceflight	O
applications	O
.	O
</s>
<s>
In	O
the	O
USSR	O
,	O
BNC	B-Protocol
connectors	I-Protocol
were	O
copied	O
as	O
SR	B-Protocol
connectors	I-Protocol
.	O
</s>
<s>
A	O
threaded	O
version	O
of	O
the	O
BNC	B-Protocol
connector	I-Protocol
,	O
known	O
as	O
the	O
TNC	B-Protocol
connector	I-Protocol
(	O
for	O
Threaded	O
Neill-Concelman	O
)	O
is	O
also	O
available	O
.	O
</s>
<s>
It	O
has	O
superior	O
performance	O
to	O
the	O
BNC	B-Protocol
connector	I-Protocol
at	O
microwave	O
frequencies	O
.	O
</s>
<s>
Twin	B-Protocol
BNC	I-Protocol
(	O
also	O
known	O
as	O
twinax	O
)	O
connectors	O
use	O
the	O
same	O
bayonet	O
latching	O
shell	O
as	O
an	O
ordinary	O
BNC	B-Protocol
connector	I-Protocol
but	O
contain	O
two	O
independent	O
contact	O
points	O
(	O
one	O
male	O
and	O
one	O
female	O
)	O
,	O
allowing	O
the	O
connection	O
of	O
a	O
78	O
ohm	O
or	O
95	O
ohm	O
shielded	O
differential	O
pair	O
such	O
as	O
RG-108A	O
.	O
</s>
<s>
They	O
cannot	O
mate	O
with	O
ordinary	O
BNC	B-Protocol
connectors	I-Protocol
.	O
</s>
<s>
Early	O
triaxial	O
connectors	O
were	O
designed	O
with	O
just	O
an	O
extra	O
inner	O
conductor	O
,	O
but	O
later	O
triaxial	O
connectors	O
also	O
include	O
a	O
three-lug	O
arrangement	O
to	O
rule	O
out	O
an	O
accidental	O
forced	O
mating	O
with	O
a	O
BNC	B-Protocol
connector	I-Protocol
.	O
</s>
<s>
Adaptors	O
exist	O
to	O
allow	O
some	O
interconnection	O
possibilities	O
between	O
triaxial	O
and	O
BNC	B-Protocol
connectors	I-Protocol
.	O
</s>
<s>
For	O
higher	O
voltages	O
(	O
above	O
500V	O
)	O
,	O
MHV	B-Protocol
and	O
SHV	B-Protocol
connectors	I-Protocol
are	O
typically	O
used	O
.	O
</s>
<s>
MHV	B-Protocol
connectors	I-Protocol
are	O
easily	O
mistaken	O
for	O
BNC	O
type	O
,	O
and	O
can	O
be	O
made	O
to	O
mate	O
with	O
them	O
by	O
brute	O
force	O
.	O
</s>
<s>
The	O
SHV	B-Protocol
connector	I-Protocol
was	O
developed	O
as	O
a	O
safer	O
alternative	O
,	O
it	O
will	O
not	O
mate	O
with	O
ordinary	O
BNC	B-Protocol
connectors	I-Protocol
and	O
the	O
inner	O
conductor	O
is	O
much	O
harder	O
to	O
accidentally	O
contact	O
.	O
</s>
<s>
BNC	B-Protocol
connectors	I-Protocol
are	O
commonly	O
used	O
in	O
electronics	O
,	O
but	O
in	O
some	O
applications	O
they	O
are	O
being	O
replaced	O
by	O
LEMO	B-Application
00	O
miniature	O
connectors	O
which	O
allow	O
for	O
significantly	O
higher	O
densities	O
.	O
</s>
