🔍 Key Concepts

• VHF (Very High Frequency) channel spacing and why precise tuning matters • Purpose of an RF signal generator when testing or aligning radio equipment • Difference between signal quality (leakage, modulation) and signal accuracy (how close it is to the intended frequency)

💭 Think About

• When aligning or testing a VHF receiver, what characteristic of the test signal must closely match the assigned channel to avoid mis-tuning? • Which specification would most directly affect whether the equipment under test is on the correct frequency versus just sounding clean or well-modulated? • If you had to choose one parameter that, if wrong, would make all other parameters less useful in a frequency-sensitive band like VHF, which would it be?

✅ Before You Answer

• Compare how critical frequency accuracy is at VHF, where channels are closely spaced, versus modulation percentage or type. • Consider whether low signal leakage affects the measurement itself or mainly the surrounding environment and other equipment. • Think about whether frequency modulation (FM) is a mode of operation or the primary specification you rely on when using a signal generator at VHF.