Using an incorrect RG cable type in a radio or data system may lead to which result?

Using an incorrect RG cable type in a radio or data system may lead to which result?

• A. No effect on equipment
• B. Reduced bandwidth
• C. Equipment damage and system failure
• D. Minor interference

Answer: (C)

Using the wrong RG cable type in a radio or data system creates an impedance mismatch and can exceed the cable’s power-handling and insulation ratings. RF systems rely on a specific characteristic impedance (often 50 ohms) so the transmitter’s output sees the correct load. When a cable with a different impedance is used, part of the transmitted power is reflected back toward the transmitter. That reflected power raises the standing-wave ratio (SWR) and can cause voltage and current spikes, overheating, and stress on the transmitter’s output stage. Over time, this can damage components or lead to system failure. Some cables may also have insufficient shielding or voltage ratings, which can allow RF energy to leak or cause insulation breakdown, compounding the risk to equipment. While reduced bandwidth or minor interference can occur with a poor cable choice, the most serious and likely outcome is damage to equipment and potential system failure, which is why this option is the best choice.

Using the wrong RG cable type in a radio or data system creates an impedance mismatch and can exceed the cable’s power-handling and insulation ratings. RF systems rely on a specific characteristic impedance (often 50 ohms) so the transmitter’s output sees the correct load. When a cable with a different impedance is used, part of the transmitted power is reflected back toward the transmitter. That reflected power raises the standing-wave ratio (SWR) and can cause voltage and current spikes, overheating, and stress on the transmitter’s output stage. Over time, this can damage components or lead to system failure. Some cables may also have insufficient shielding or voltage ratings, which can allow RF energy to leak or cause insulation breakdown, compounding the risk to equipment.

While reduced bandwidth or minor interference can occur with a poor cable choice, the most serious and likely outcome is damage to equipment and potential system failure, which is why this option is the best choice.