The BNC adapter (Bayonet Neill–Concelman) is a accepted blazon of RF adapter acclimated for coaxial cable. It is acclimated with radio, television, and added radio-frequency cyberbanking equipment, analysis instruments, video signals, and was already a accepted computer arrangement connector. BNC connectors are fabricated to bout the appropriate impedance of cable at either 50 ohms or 75 ohms. It is usually activated for frequencies beneath 3 GHz 1 and voltages beneath 500 Volts.2 Similar connectors application the bayonet affiliation assumption exist, and a threaded adapter is aswell available.
Monday, February 27, 2012
Use
The BNC adapter is acclimated for arresting access such as:
analog and consecutive agenda interface video signals
abecedarian radio antennas
aerodynamics electronics (avionics)
analysis equipment.
BNC Tee Connectors with terminators
It is an another to the RCA adapter if acclimated for blended video on bartering video devices, although abounding customer electronics accessories with RCA jacks can be acclimated with BNC-only bartering video accessories via a simple adapter. BNC connectors were frequently acclimated on 10base2 attenuate Ethernet networks, both on cable arrangement and arrangement cards. The TNC (threaded) adapter is acclimated for abiding achievement at college frequencies than acclimated with the BNC connector.
BNC access can aswell be begin in recording studios. Agenda recording accessories uses the affiliation for synchronization of assorted apparatus via the manual of chat alarm timing signals.
analog and consecutive agenda interface video signals
abecedarian radio antennas
aerodynamics electronics (avionics)
analysis equipment.
BNC Tee Connectors with terminators
It is an another to the RCA adapter if acclimated for blended video on bartering video devices, although abounding customer electronics accessories with RCA jacks can be acclimated with BNC-only bartering video accessories via a simple adapter. BNC connectors were frequently acclimated on 10base2 attenuate Ethernet networks, both on cable arrangement and arrangement cards. The TNC (threaded) adapter is acclimated for abiding achievement at college frequencies than acclimated with the BNC connector.
BNC access can aswell be begin in recording studios. Agenda recording accessories uses the affiliation for synchronization of assorted apparatus via the manual of chat alarm timing signals.
Origin
The adapter was called afterwards its bayonet arise locking apparatus and its inventors, Paul Neill and Carl Concelman.1 Neill formed at Bell Labs and aswell invented the N connector; Concelman formed at Amphenol and aswell invented the C connector.
The base for the development of the BNC adapter was abundantly the plan of Octavio M. Salati, a alum of the Moore School of Electrical Engineering of the University of Pennsylvania. In 1945, while alive at Hazeltine Electronics Corporation, he filed a apparent for a adapter for coaxial cables that would abbreviate beachcomber reflection/loss. The apparent was accepted in 1951.3
The base for the development of the BNC adapter was abundantly the plan of Octavio M. Salati, a alum of the Moore School of Electrical Engineering of the University of Pennsylvania. In 1945, while alive at Hazeltine Electronics Corporation, he filed a apparent for a adapter for coaxial cables that would abbreviate beachcomber reflection/loss. The apparent was accepted in 1951.3
Types and compatibility
Types
BNC connectors abide in 50 and 75 ohm versions, akin for use with cables of the aforementioned appropriate impedance. The 75 ohm types can sometimes be accustomed by the bargain or absent dielectric in the alliance ends. The 50 and 75 ohm connectors are about defined for use at frequencies up to 4 and 2 GHz respectively.
Video and DS3 Telco axial appointment applications primarily use 75 ohm BNC connectors, admitting 50 ohm connectors are acclimated for abstracts and RF. Many VHF receivers acclimated 75 ohm antenna inputs, so they generally acclimated 75 ohm BNC connectors.
edit Compatibility
The altered versions are advised to acquaintance with anniversary other,2 and a 75 ohm and a 50 ohm BNC adapter which both accede with the 1978 standard, IEC 169-8, will acquaintance non-destructively. At atomic one manufacturer4 claims actual top believability for the connectors' compatibility.
At frequencies beneath 10 MHz the impedance conflict amid a 50 ohm adapter or cable and a 75 ohm one has negligible effects.5 BNC connectors were appropriately originally fabricated alone in 50 ohm versions, for use with any impedance of cable. Above this frequency, however, the conflict becomes progressively added cogent and can advance to arresting reflections.
BNC connectors abide in 50 and 75 ohm versions, akin for use with cables of the aforementioned appropriate impedance. The 75 ohm types can sometimes be accustomed by the bargain or absent dielectric in the alliance ends. The 50 and 75 ohm connectors are about defined for use at frequencies up to 4 and 2 GHz respectively.
Video and DS3 Telco axial appointment applications primarily use 75 ohm BNC connectors, admitting 50 ohm connectors are acclimated for abstracts and RF. Many VHF receivers acclimated 75 ohm antenna inputs, so they generally acclimated 75 ohm BNC connectors.
edit Compatibility
The altered versions are advised to acquaintance with anniversary other,2 and a 75 ohm and a 50 ohm BNC adapter which both accede with the 1978 standard, IEC 169-8, will acquaintance non-destructively. At atomic one manufacturer4 claims actual top believability for the connectors' compatibility.
At frequencies beneath 10 MHz the impedance conflict amid a 50 ohm adapter or cable and a 75 ohm one has negligible effects.5 BNC connectors were appropriately originally fabricated alone in 50 ohm versions, for use with any impedance of cable. Above this frequency, however, the conflict becomes progressively added cogent and can advance to arresting reflections.
BNC inserter/remover tool
A BNC inserter/remover accoutrement aswell alleged a BNC tool, BNC abstraction accoutrement or BNC angel corer, is acclimated to admit or abolish BNC connectors in top body or hard-to-reach locations, such as densely active application panels in advertisement accessories like axial accoutrement rooms.
BNC accoutrement are usually ablaze weight, fabricated with stainless steel, and accept spiral disciplinarian blazon artificial handle grips for applying alternating torque. Their shafts are usually bifold the breadth of a accepted spiral driver.
They advice to safely, calmly and bound affix and abstract BNC connectors in jack fields. BNC accoutrement facilitate admission and abbreviate the accident of accidentally disconnecting adjacent connectors.
BNC accoutrement are usually ablaze weight, fabricated with stainless steel, and accept spiral disciplinarian blazon artificial handle grips for applying alternating torque. Their shafts are usually bifold the breadth of a accepted spiral driver.
They advice to safely, calmly and bound affix and abstract BNC connectors in jack fields. BNC accoutrement facilitate admission and abbreviate the accident of accidentally disconnecting adjacent connectors.
Similar connectors
SR-50 and SR-75
In the USSR, BNC connectors were affected as SR-50 (СР-50 in Cyrillic) and SR-75 (СР-75 in Cyrillic) connectors. As a aftereffect of recalculating from administrative to metric abstracts their ambit alter hardly from those of BNC. They are about about changeable with them, sometimes with force applied.
edit TNC (Threaded Neill–Concelman)
A threaded adaptation of the BNC connector, accepted as the TNC adapter (for Threaded Neill-Concelman) is aswell available. It has above achievement to the BNC adapter at bake frequencies.
Main article: TNC connector
edit Twin BNC or twinax
Twin BNC (also accepted as twinax) connectors use the aforementioned bayonet latching carapace as an accustomed BNC adapter but accommodate two absolute acquaintance credibility (one macho and one female), acceptance the affiliation of a 78 ohm or 95 ohm cloistral cogwheel brace such as RG-108A.6 They can accomplish up to 100 MHz and 100 volts. They cannot acquaintance with accustomed BNC connectors. An abridgement for twinax connectors has been BNO (Sühner).
edit Triaxial
Triaxial (also accepted as triax) connectors are a alternative on BNC which backpack both a arresting and bouncer as able-bodied as arena conductor. These are acclimated in acute cyberbanking altitude systems, such as those fabricated by Keithley.citation needed Early ones were advised with just an added close conductor, but after triaxial connectors aswell cover a three-lug adjustment to aphorism out an adventitious affected alliance with a BNC connector. Adaptors abide to acquiesce some alternation possibilities amid triax and BNC connectors. The Triaxial may aswell be accepted as a Trompeter connection.
In the USSR, BNC connectors were affected as SR-50 (СР-50 in Cyrillic) and SR-75 (СР-75 in Cyrillic) connectors. As a aftereffect of recalculating from administrative to metric abstracts their ambit alter hardly from those of BNC. They are about about changeable with them, sometimes with force applied.
edit TNC (Threaded Neill–Concelman)
A threaded adaptation of the BNC connector, accepted as the TNC adapter (for Threaded Neill-Concelman) is aswell available. It has above achievement to the BNC adapter at bake frequencies.
Main article: TNC connector
edit Twin BNC or twinax
Twin BNC (also accepted as twinax) connectors use the aforementioned bayonet latching carapace as an accustomed BNC adapter but accommodate two absolute acquaintance credibility (one macho and one female), acceptance the affiliation of a 78 ohm or 95 ohm cloistral cogwheel brace such as RG-108A.6 They can accomplish up to 100 MHz and 100 volts. They cannot acquaintance with accustomed BNC connectors. An abridgement for twinax connectors has been BNO (Sühner).
edit Triaxial
Triaxial (also accepted as triax) connectors are a alternative on BNC which backpack both a arresting and bouncer as able-bodied as arena conductor. These are acclimated in acute cyberbanking altitude systems, such as those fabricated by Keithley.citation needed Early ones were advised with just an added close conductor, but after triaxial connectors aswell cover a three-lug adjustment to aphorism out an adventitious affected alliance with a BNC connector. Adaptors abide to acquiesce some alternation possibilities amid triax and BNC connectors. The Triaxial may aswell be accepted as a Trompeter connection.
High voltage connectors
For college voltages (above 500 V), MHV and SHV connectors are about used. MHV connectors are calmly mistaken for BNC type, and can be fabricated to acquaintance with them by animal force. The SHV adapter was developed as a safer alternative, and will not acquaintance with accustomed BNC connectors.
Miniature connectors
BNC connectors are frequently acclimated in electronics, but they are replaced by LEMO 00 miniature connectors which acquiesce for college densities. In video advertisement industry, the DIN 1.0/2.3 and the HD-BNC adapter are acclimated for college body products.
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