Question
What is the purpose of using a receive attenuator?
Answer Options
- A) To prevent receiver overload from strong incoming signals
- B) To reduce the transmitter power when driving a linear amplifier
- C) To reduce power consumption when operating from batteries
- D) To reduce excessive audio level on strong signals
Correct Answer: A
Explanation
A receive attenuator is a control on a receiver that introduces a known amount of signal loss (attenuation) into the input circuitry, before the first amplifier stage. The main purpose of using a receive attenuator is to prevent receiver overload from strong incoming signals.
Strong local signals, particularly those from broadcast stations or nearby amateur operators, can overwhelm the receiver’s early stages, causing clipping and the generation of spurious signals (intermodulation distortion). Attenuating the signal before it reaches these stages can prevent the distortion and restore the receiver’s ability to hear weaker, desired signals.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!