Which statement regarding bandwidth and...

Which statement regarding bandwidth and channel spacing is correct:

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🔍 Key Concepts

• Relationship between bandwidth (how wide a signal is) and channel spacing (how far apart assigned channels are) in radio communications • How emission mode (voice, data, digital selective calling, etc.) affects the bandwidth a signal requires • Why authorities set minimum channel spacing based on the bandwidth needed to prevent overlap/interference

💭 Think About

• If you know the bandwidth a particular emission mode requires, how would that influence how close together you can place adjacent channels without them interfering? • Think about it the other way around: if you decide on a certain channel spacing first, does that automatically determine the bandwidth of the signal you use, or do you choose the emission mode (and its bandwidth) and then set spacing to suit it? • How does changing from one emission mode (e.g., narrowband vs wideband) affect the minimum safe channel spacing between frequencies?

✅ Before You Answer

• Be clear which depends on which: Does channel spacing depend on the signal’s bandwidth, or the other way around? • Confirm that different emission modes use different bandwidths, and consider what that implies for channel spacing. • Eliminate any choice that suggests no relationship between bandwidth, channel spacing, or emission mode, if you know there is a technical/operational link.

🔍 Key Concepts

💭 Think About

✅ Before You Answer