A modem is connected to a 4,800 bit/s data terminal. Assuming that a 50-percent roll-off pulse shaping is used for all cases, calculate the required transmission bandwidth BT at the modem output for each of the following schemes: a) Frequency-shift keying (FSK) transmission with a frequency deviation of +- 3,600 Hz around the carrier frequency. b) Amplitude-shift keying (ASK) transmission
A modem is connected to a 4,800 bit/s data terminal. Assuming that a 50-percent roll-off pulse shaping is used for all cases, calculate the required transmission bandwidth BT at the modem output for each of the following schemes: a) Frequency-shift keying (FSK) transmission with a frequency deviation of +- 3,600 Hz around the carrier frequency. b) Amplitude-shift keying (ASK) transmission
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 25RQ
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A modem is connected to a 4,800 bit/s data terminal. Assuming that a 50-percent roll-off pulse shaping is used for all cases, calculate the required transmission bandwidth BT at the modem output for each of the following schemes:
a) Frequency-shift keying (FSK) transmission with a frequency deviation of +- 3,600 Hz around the carrier frequency.
b) Amplitude-shift keying (ASK) transmission
c) 16-level quadrature amplitude modulation (QAM)
Which scheme is the optimum modulation for this transmission?
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