TSE-ME-SOLB-09

A telephone line has a bandwidth of 6 kHz and a signal-to-noise ratio of 20 dB. A signal is transmitted down this line using a four-level code. What is the maximum theoretical data rate?

• 39.95 kbps
• 18 kbps
• 24 kbps
• 41.79 kbps

What bandwidth is needed to support a capacity of 128 kbps when the signal power to noise power ratio in decibels is 100?

• 1.85 kHz
• 2.85 kHz
• 3.85 kHz
• 4.85 kHz

A binary digital signal is to be transmitted at 10 kb/s, what absolute minimum bandwidth is required to pass the fastest information change undistorted?

• 3 kHz
• 4 kHz
• 5 kHz
• 6 kHz

A radio channel has a bandwidth of 10 kHz and a signal-to-noise of 15 dB. What is the maximum data rate that can be transmitted using any system?

• 30.3 kbps
• 40.3 kbps
• -50.3 kbps
• 60.3 kbps

Ignoring noise, calculate the maximum data rate that could be carried in a TV channel using a 16-level code and determine the minimum possible signal-to-noise ratio in dB for the calculated data rate.

• 14 dB
• 24 dB
• 34 dB
• 44 dB

How much bandwidth would be required to transmit a DS-1 signal using an eight-level code assuming a noiseless channel?

• 257.33 Hz
• 257.33 kHz
• 257.33 MHz
• 257.33 GHz

A microwave radio system uses 256-QAM, that is, there are 256 possible amplitude and phase combinations. If it has a channel with 20-MHz bandwidth, what is its maximum data rate, ignoring noise?

• 320 Mb/s
• 96 Mb/s
• 640 Mb/s
• 192 Mb/s

What is the channel capacity for a signal power of 200 W, noise power of 10 W, and a bandwidth of 2 kHz of a digital system?

• 7.779 kbps
• 8.779 kbps
• 9.779 kbps
• 6.779 kbps

Assuming there is negligible noise, what would be the data rate of one satellite transponder used for binary transmission?

• 62 Mbps
• 72 Mbps
• 82 Mbps
• 92 Mbps

Find the number of different encoding levels per time interval for a channel capacity of 49.6 kbps and a bandwidth of 2.755 kHz.

• 9
• 7
• 8
• 6