Twisted pair to coaxial balun

30 April 2008 Telecoms, Datacoms, Wireless, IoT

Pulse has introduced its Excelsus brand B-V175 twisted pair to coaxial balun that allows digital subscriber line (DSL) or home phone-line networking (HPN) frequencies to be transmitted from twisted pair to coaxial mediums, and vice versa, to support VDSL2 and HomePNA deployments.

The balun is easily installed with simple plug-in connections. It matches a 100 Ω twisted pair cable, which is a balanced signal, to a 75 Ω coaxial cable, which is an unbalanced signal, without degrading the signal.

Telephone companies transmit their signals over twisted pair wiring. This is the existing home wiring that normally is supplied to a house by the telephone company. A balun is a passive electronic device that converts between balanced and unbalanced electrical signals. With the B-V175, the twisted pair telephone or VDSL2 connectors are plugged into one end of the balun and a coaxial cable that is connected to the other end of the balun is plugged into a set-top box. The signal from the phone/VDSL2 line is then able to be used to supply the set-top box and the TV with Internet protocol television (IPTV).

The B-V175 can pass frequencies from 25 kHz to 30 MHz from twisted pair to coaxial cable with less than 1,5 dB insertion loss across the entire frequency band. In addition, it has a filtered phone port for plain old telephone service (POTS) telephones.

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