QUESTION TYPE: Most Strongly Supported
- Analog systems can be more detailed than digital systems, in theory.
- In practice they tend to have a higher error rate when the signal is reproduced. The errors grow and the signal is drowned out by noise.
ANALYSIS: All we can say is that digital systems tend to be better, when the signal has to be reproduced.
It’s important to know why and when analog systems have a high error rate. It is only when the signal is reproduced. Answer choice D is wrong because it is too broad. Analog systems may be superior in practice in some situations that don’t call for signal reproduction.
- We don’t know if this is true of many things or if it is only true of analog systems.
- Analog representation can be impractical, but not because we don’t need detailed information. It is impractical because the error rate is high.
- This isn’t necessarily true. Digital systems might still have errors as long as they have fewer errors than analog systems.
- This is a bit too broad. We only know errors cripple analog systems when the signal is reproduced. In situations where the signal is not reproduced analog systems may be better.
- CORRECT. The main problem for analog systems is that errors are multiplied when the signal is reproduced. If the signal isn’t reproduced then analog systems may be better.
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