Analog vs Digital signals & Imparements

Question 1 of 10

1

The power we use at home has a frequency of 60Hz. The period of this sine wave can be written as follows:

Select one of the following:

16.6s
16.6ms
Data not sufficient
0.0166us

Explanation

Question 2 of 10

1

A periodic signal has a bandwidth of 20 Hz. The highest frequency is 60 Hz. What is the lowest frequency?

Select one of the following:

0 Hz
30 Hz
40 Hz
50 Hz

Explanation

Question 3 of 10

1

The strength of signals falls off with distance over any transmisison.

Select one of the following:

Attenuation
Interference

Explanation

Question 4 of 10

1

The course COMP 2140 introduces fundamental concepts related to the digital transmission and reception of information.

Select one of the following:

True
False

Explanation

Question 5 of 10

1

Signals can be analog or digital. Analog signals can have an infinite number of values in a range; digital signals can have only a limited number of values.

Select one of the following:

True
False

Explanation

Question 6 of 10

1

The values of SNR and SNR(dB) can be calculated as follows:

SNR = (10,000uW / 1 mW) = 10,000

The value of SNR (dB) is 30 dB.

Select one of the following:

True
False

Explanation

Question 7 of 10

1

Consider the noiseless channel transmitting a signal with four signal levels . The maximum bit rate can be calculated as:

Select one of the following:

12,000 Bps
12,000 kbps
1200 bps
None of the above

Explanation

Question 8 of 10

1

The loss in a cable is usually defined in decibels per kilometer (dB/km). If the signal at the beginning of a cable with −0.3 dB/km has a power of 2 mW, what is the power of the signal at 5 km in dB?

Select one of the following:

+1.5 dB
Loss of 1.5 dB
- 1.5 dBm
+3 dB

Explanation

Question 9 of 10

1

For any transmission event, the received signal will consist of the transmitted signal modified by the various distortion imposed by the transmission system plus additional unwanted signals that are inserted somewhere between transmission or reception. The latter undesired signals are referred to as:

	Created by ryo.iwata about 11 years ago

Data communication Quiz on Analog vs Digital signals & Imparements, created by ryo.iwata on 27/11/2013.

Analog vs Digital signals & Imparements

Question 1 of 10

The power we use at home has a frequency of 60Hz. The period of this sine wave can be written as follows:

Select one of the following:

Explanation

Question 2 of 10

A periodic signal has a bandwidth of 20 Hz. The highest frequency is 60 Hz. What is the lowest frequency?

Select one of the following:

Explanation

Question 3 of 10

The strength of signals falls off with distance over any transmisison.

Select one of the following:

Explanation

Question 4 of 10

The course COMP 2140 introduces fundamental concepts related to the digital transmission and reception of information.

Select one of the following:

Explanation

Question 5 of 10

Signals can be analog or digital. Analog signals can have an infinite number of values in a range; digital signals can have only a limited number of values.

Select one of the following:

Explanation

Question 6 of 10

The values of SNR and SNR(dB) can be calculated as follows: SNR = (10,000uW / 1 mW) = 10,000 The value of SNR (dB) is 30 dB.

Select one of the following:

Explanation

Question 7 of 10

Consider the noiseless channel transmitting a signal with four signal levels . The maximum bit rate can be calculated as:

Select one of the following:

Explanation

Question 8 of 10

The loss in a cable is usually defined in decibels per kilometer (dB/km). If the signal at the beginning of a cable with −0.3 dB/km has a power of 2 mW, what is the power of the signal at 5 km in dB?

Select one of the following:

Explanation

Question 9 of 10

Select one of the following:

Explanation

Question 10 of 10

There are three causes of impairments which are:

Select one or more of the following:

Explanation

The values of SNR and SNR(dB) can be calculated as follows:

SNR = (10,000uW / 1 mW) = 10,000

The value of SNR (dB) is 30 dB.