Exam 5: The Transmitted Signal

Alexander Graham Bell was one of the early modern developers who used light to transmit human speech.

A total of three modulated carriers make up the total composite signal.

The process of putting information on a carrier wave is called rectification.

Single-mode fiber optic cable uses multiple modes of light simultaneously to carry data.

Because digital signals take less spectrum space than analog, multiple signals can be carried simultaneously, even on a virtual channel, through what are called sub-channels.

Portions of both the VHF and UHF spectrum space have traditionally been used in analog television broadcasting.

A virtual channel is a channel designation that differs from the actual assigned channel frequency.

When the television system was originally created, it was decided that 4 MHz of bandwidth or spectrum space would be made available for the transmission of television signals on the carrier for each particular station.

In television broadcasting, the video image was transmitted by frequency modulation of the carrier.

Geosynchronous orbit means that a satellite orbits 22 miles above the earth and will appear to stay in a fixed or stationary position.