Amplitude shift keying

The process of changing one of the characteristics of a carrier analog signal based on the information in a digital signal is called _________________conversion.

• a. Analog-to –analog

• b. Analog-to-digital

• c. Digital-to-analog

• d. Digital-to-digital

In _________________ the amplitude of the carrier signal is varied based on the information in a digital signal.

• a. ASK

• b. PSK

• c. FSK

• d. QAM

______ rate is the number of bits per second; ______________ rate is the number of signal units per second

• a. Baud; bit

• b. Bit; baud

• c. Baud; base

• d. Base; baud

ASK is also known as_______________.

• a. OOK

• b. PSK

• c. FSK

• d. QAM

The minimum bandwidth for an ASK modulated signal with a baud rate of 5000 is ______ Hz.

• a. 1000

• b. 2500

• c. 5000

• d. 10000

The modulation technique most affected by noise is ______________.

• a. ASK

• b. PSK

• c. FSK

• d. QAM

_______________rate is always less than or equal to ____________rate.

• a. Baud; bit

• b. Bit; baud

• c. Baud; base

• d. Base; baud

If the bit rate is 1200 bps and there are 4 bits for each signal element, then baud rate is _______________.

• a. 4800

• b. 1200

• c. 400

• d. 300

Two ways of ASK demodulation

• a. Coherent detection & non-Coherent detection

• b.Synchronous demodulation & non-Synchronous demodulation

• c. both a & b

• d. there is only one demodulation technique in ASK.

Which of the following is not the application of ASK?

• a. High-frequency RF applications

• b. Home automation devices

• c. Industrial networks devices

• d. Wireless base stations