Differentiate between analog and digital telemetry signals.

• A. Analog telemetry transmits continuous-valued signals; digital telemetry transmits discrete-valued symbols or bits, enabling error detection and easier processing.
• B. Digital signals require analog components.
• C. Analog telemetry uses digital encoding.
• D. Digital telemetry cannot be processed.

Answer: (A)

The key idea is how information is represented in telemetry signals. Analog telemetry carries signals that vary continuously in value, so the measured quantity maps to a smooth, uninterrupted waveform. Digital telemetry uses discrete values—bits or symbols like 0s and 1s—to represent information. This discrete representation makes data easy to store, transmit reliably, and process with digital electronics, and it enables error detection and correction to improve data integrity.

That’s why the statement is the best: continuous signals describe the real world in a seamless way, while digital signals convert that information into a finite set of symbols, which can be checked for errors and handled efficiently by computers and digital circuitry. In practice, digital processing and error-detecting codes are straightforward to implement with digital hardware, whereas analog signals require continuous, often more noise-susceptible processing.

Some other ideas can be misleading: digital signals don’t inherently require analog components to exist or function, and analog encoding is not digital by nature. Digital telemetry can be processed, mischaracterizing what digital systems are designed to do.