Deep Dive: T7B01
The correct answer is D: Talk farther away from the microphone. If your FM handheld or mobile transceiver is over-deviating (exceeding the maximum allowed frequency deviation), you should talk farther away from the microphone. Over-deviation occurs when the audio input is too strong, causing the FM signal to deviate beyond legal limits (typically ±5 kHz for narrowband FM). Moving away from the microphone reduces the audio level, which reduces the deviation. For amateur radio operators, understanding deviation control is important for legal operation and clear communications. Over-deviation can cause interference to adjacent channels and violate FCC regulations. Proper microphone technique helps maintain proper deviation levels.
Why Other Answers Are Wrong
Option A: Incorrect. Talking louder increases audio level, which increases deviation, making over-deviation worse, not better. Option B: Incorrect. Cooling off doesn't affect deviation. Deviation is controlled by audio input level, not temperature. Option C: Incorrect. Higher power level doesn't reduce deviation - it increases transmit power but doesn't affect the frequency deviation caused by audio.
Exam Tip
Over-deviation = too much audio = talk farther from mic. Think 'O'ver-deviation = 'O'ver audio level = move 'O'ff (away from) microphone. Reducing audio input reduces deviation.
Memory Aid
Over-deviation = talk farther from mic. Think 'O'ver-deviation = 'O'ver audio = move 'O'ut (away). Distance reduces audio, which reduces deviation.
Real-World Example
If someone reports your signal is over-deviating on the repeater, you're speaking too close to the microphone, causing excessive audio levels. By moving the microphone 6-12 inches away from your mouth, you reduce the audio input, which reduces the frequency deviation back to legal limits. This improves signal quality and ensures compliance with regulations.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T7B
Reference: 2022-2026 Question Pool · T7 - Practical circuits
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T7B topic.