Which of the following would reduce ignition interference to a receiver?

The option that would effectively reduce ignition interference to a receiver is to turn on the noise blanker. The noise blanker is a specialized circuit designed to eliminate or minimize pulsed noise, which often originates from sources like ignition systems in vehicles. When a vehicle's engine is running, it can generate electrical noise that interferes with radio reception. The noise blanker detects these sharp, transient noise spikes and suppresses them, allowing for clearer reception of desired signals.

Turning on the noise blanker helps to filter out this unwanted noise, making it an essential tool for improving clarity in communication, especially in environments where ignition interference is present. This functionality is particularly valuable for ham radio operators who may operate in urban areas or near vehicular traffic where such interference is common.

Other options, while they may affect the signal or reception quality in various ways, do not specifically target ignition interference. For example, changing frequency slightly might work in some cases, but it does not actively combat the pulsed nature of ignition noise. Decreasing the squelch setting could allow more noise to pass through, and using the RIT (Receiver Incremental Tuning) control is designed for fine-tuning the frequency of a received signal rather than noise reduction. Thus, activating