Editing Back-to-back connection

A '''back-to-back''' connection is the direct [[electrical connection|connection]] of the output of one device to the input of a similar or related device.

==Telecommunications==
In [[telecommunications]], a back-to-back connection can be formed by connecting a [[transmitter]] directly to a receiver without a [[transmission line]] in between.<ref>[[Federal Standard 1037C]] and from [[MIL-STD-188]]</ref> This is used for equipment measurements and testing purposes. The back-to-back connection eliminates the effects of the [[transmission medium]].

In some cases, the output of a receiving device is instead connected to the input of a transmitting device.

== Power transmission ==
A back-to-back connection for [[electric power transmission]] is a [[High-voltage direct current|high-voltage direct-current]] (HVDC) system with both ends in the same [[Electrical substation|switchyard]]. This is used to couple asynchronously operated [[power grid]]s or for connecting power grids of different [[frequency|frequencies]] where no DC transmission line is necessary.

== Electronics ==
In [[electronics]], a back-to-back connection is the connection of two identical or similar components in [[Series circuit|series]] with the opposite polarity. This is used to convert polarised components to non-polar use. Common examples include:
* [[electrolytic capacitor]]s
* [[zener diode]]s

== Notes ==
{{reflist}}

[[Category:Telecommunications techniques]]
[[Category:High-voltage direct current]]
[[Category:Capacitors]]
[[Category:Diodes]]


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