What term describes a wide-bandwidth...

Question 1 / 27070qrWx3s0d6ovJmSJELGvW

Question 1 of 27070qrWx3s0d6ovJmSJELGvW

What term describes a wide-bandwidth communications system in which the RF carrier varies according to some pre-determined sequence?

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Question 1 of 27070

What term describes a wide-bandwidth communications system in which the RF carrier varies according to some pre-determined sequence?

🔍 Key Concepts

• RF carrier and what it means for it to "vary" • Difference between modulation methods (like AMTOR/SITOR) and spread-spectrum techniques • The idea of a pre-determined sequence controlling frequency or phase changes

💭 Think About

• Ask yourself: which choice is a general type of system rather than a specific teletype/ARQ mode? • Which option describes changing the carrier over a range of frequencies or phases according to a coded pattern? • Which terms (if any) are known as specific marine digital modes, not descriptions of wide-bandwidth systems?

✅ Before You Answer

• Identify which options are specific maritime digital modes versus a broad category of radio technique. • Consider which choice is commonly associated with jamming resistance and security by hopping or spreading over a wide band. • Make sure the correct term explicitly relates to a wide-bandwidth RF signal controlled by a coded sequence.

Question 1 of 27070

What term describes a wide-bandwidth communications system in which the RF carrier varies according to some pre-determined sequence?

Spread - spectrum communication .

AMTOR.

SITOR.

Time-domain frequency modulation.