Carrier Circuit Phantoms
From the 1950s to around the 1980s, using phantoms on star-quad trunk carrier circuits was a popular method of deriving a high quality broadcast audio circuit. The multiplexed FDM telecommunications carrier system usually did not use the baseband of the cable because it was inconvenient to separate low frequencies with filters. On the other hand, a one-way audio phantom could be formed from the two pairs (go and return signals) making up the star-quad cable.
Read more about this topic: Phantom Circuit
Famous quotes containing the words carrier, circuit and/or phantoms:
“Because language is the carrier of ideas, it is easy to believe that it should be very little else than such a carrier.”
—Louise Bogan (1897–1970)
“The Father and His angelic hierarchy
That made the magnitude and glory there
Stood in the circuit of a needle’s eye.”
—William Butler Yeats (1865–1939)
“Peace, peace! he is not dead, he doth not sleep—
He hath awakened from the dream of life—
‘Tis we, who lost in stormy visions, keep
With phantoms an unprofitable strife.”
—Percy Bysshe Shelley (1792–1822)