What is the main purpose of galvanic isolation in transmitters?

What is the main purpose of galvanic isolation in transmitters?

• A. To improve signal fidelity in noisy environments.
• B. To prevent ground loops and isolate devices from faults.
• C. To increase signal strength.
• D. To reduce power consumption.

Answer: (B)

Galvanic isolation blocks any direct electrical path between two sides while still letting the signal pass through a barrier. This separation prevents ground loops from forming when different equipment references have varying ground potentials, so stray currents won’t circulate through shared grounds and distort the measurement. It also keeps faults on one side from being injected into the other, protecting equipment and operators and reducing the chance of damage from a surge or fault. While isolation can help reduce some noise by breaking ground loops, the main purpose is safety and fault/isolation protection, not to increase signal strength or power efficiency.

Galvanic isolation blocks any direct electrical path between two sides while still letting the signal pass through a barrier. This separation prevents ground loops from forming when different equipment references have varying ground potentials, so stray currents won’t circulate through shared grounds and distort the measurement. It also keeps faults on one side from being injected into the other, protecting equipment and operators and reducing the chance of damage from a surge or fault. While isolation can help reduce some noise by breaking ground loops, the main purpose is safety and fault/isolation protection, not to increase signal strength or power efficiency.