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Unformatted text preview: UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Sciences EE 42 / 100 Problem Set 10 Spring 2008 1. In this problem we compare transmission of analog and digital audio signals over a cable with length L . A (simple) electrical model for the cable is shown below and consists of resistor R L = 1 m L and capacitor C L = 100 pF m L . The voltages v 1 and v 2 mark the transmitter and receiver end of the cable. (a) What is the maximum cable length L that results in no more than 0.5 dB attenuation over the 20 Hz . . . 20 kHz signal band? (b) Now the signal is first converted to a digital pulse train. The CD audio standard encodes an analog mono audio signal into a train of pulses of 1.42 s duration each. What is the maximum cable length L that ensures each pulse gets to at least 80 % of its final value? This condition ensures reliable detection of the signal by the receiver as 1s and 0s....
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- Spring '08
- Electrical Engineering