🔍 Key Concepts

• Crystal oscillator stability in radio transmitters • How power supply variations affect oscillator frequency and operation • Why a separate power source might reduce unwanted interactions with other transmitter stages

💭 Think About

• Think about what might happen to a crystal oscillator if it shares a power supply with high‑power RF amplifier stages that draw varying current. • Which of the listed effects is something you would want to AVOID in a frequency‑determining stage like a crystal oscillator? • Ask yourself: would an engineer ever intentionally design a circuit to CAUSE instability in a precision frequency source?

✅ Before You Answer

• Identify which options describe an undesirable condition in a frequency‑control device. • Consider which phenomenon could result from voltage fluctuations or feedback from other transmitter stages into the oscillator. • Eliminate any choice that suggests you would purposely design a system to create instability in the crystal oscillator.