Introduction to Telecommunications: 1 . Pulse amplitude modulation refers to the
ID: 668394 • Letter: I
Question
Introduction to Telecommunications:
1. Pulse amplitude modulation refers to the sample taken from the analog waveform during the time of conversion.
True or False
2. When a voice signal is converted into a digital signal, the one's and zero's of the digital signal represents letters.
True or False
3. PCM refers to the 8 bit word taken from the quantizing scale.
True or False
4. The last mile also known as the subscriber loop, refers to the section between the central office and the customer premises.
True or False
5. The multiplexer is a piece of equipment that combines multiple signals onto one transmission medium.
True or False
6. Frequancy Division Multiplexing converts each signakl to a unique frequancy band then multiplexes each band onto the medium.
True or False
Explanation / Answer
1.
Pulse modulation is used to transmit the signals by pulses. The Pulse modulation is categorized into two types are as follows:
Pulse Amplitude Modulation is a transmission technique and it produces discontinuous pulses that represent an amplitude samples of the Analog signal in which the amplitude of each pulse is controlled by the instantaneous amplitude of the modulation signal.
Hence, the statement is TRUE.
2.
Hence, the statement is TRUE.
3.
Pulse Code Modulation uses the digital modulation technique and it is used to convert the Analog signals into a binary digit (one’s and zero’s) 8-bit word associated with the level is the pulse code modulation word.
Hence, the statement is TRUE.
4.
In a telecommunication system, a section between a subscriber’s premises and the central office is known as a subscriber loop.
Hence, the statement is TRUE.
5.
To combine the multiple signals that are Analog or Digital for transmission over a single line or media is called multiplexing (MUX).
The multiplexing is done by using a device called multiplexer (MUX) that combines n input lines to generate one output.
Hence, the statement is TRUE.
6.
There are two different types of multiplexing techniques are mentioned below:
In FDM, the bandwidth of a single physical medium is divided into several unique frequency channels.
Hence, the statement is TRUE.
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