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Fill in the Blanks
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1

PCM video systems make the transmission of images over great distances possible.
2

A form of modulation known as phase-C shift keying is the most commonly used.
3

If a PCM signal has modulated a carrier and is being transmitted by radio, the RF signal will be picked up by a receiver and then .
4

In , the transmitted binary pulses all have the same amplitude and can be clipped to reduce noise.
5

All modern telephone systems use transmission via PCM and TDM.
6

The T-1 system developed by Bell Telephone, 24 voice channels onto a single line by using TDM techniques.
7

Electronic do not use mechanical parts to sample inputs, however a complete cycle of input is still called a frame.
8

A T-1 line that transmits two data sources at a(n) rate or four sources at a 386-kbps rate is called a fractional T-1 line.
9

Duplexing is the method by which communications are handled.
10

duplexing means that signals are transmitted simultaneously on a single channel by interleaving them in different time slots.
11

Multiplexing is the process of transmitting two or more individual signals over a single communication channel.
12

In frequency-division, multiple signals share the of a common communication channel.
13

A system that uses FM of the VCO subcarriers as well as FM of the final carrier is usually called a(n) system.
14

In time-division multiplexing, each signal occupies the bandwidth of the channel.
15

The rate is derived by multiplying the number of samples per frame by the frame rate.







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