Communications with an emission of J3E would...

Question 1 / 27070lrLbS3yaSnqHO5CjUOvO

Question 1 of 27070lrLbS3yaSnqHO5CjUOvO

Communications with an emission of J3E would typically have a channel spacing of:

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Question 1 of 27070

Q

Communications with an emission of J3E would typically have a channel spacing of:

🔍 Key Concepts

• J3E emission in ITU/IMO radio communications (what type of signal it is) • Standard single-sideband (SSB) channel spacing used in maritime HF/MF bands • Relationship between bandwidth of the signal and practical channel spacing

💭 Think About

• First, identify what modulation type J3E represents in marine radio use, and whether it is wideband FM, narrowband FM, or single-sideband voice. • Think about the typical spacing between channels on marine SSB voice frequencies—are they separated by fractions of a kilohertz or by a few kilohertz? • Compare each option with what would be a realistic guard space to avoid overlap between adjacent SSB voice channels.

✅ Before You Answer

• Confirm that J3E corresponds to single-sideband suppressed-carrier telephony (voice). • Review the usual HF/MF maritime SSB channel spacing specified in ITU/IMO references (commonly several kHz, not a tiny fraction of a kHz). • Check which choice best matches a realistic spacing for SSB voice channels, allowing enough bandwidth and guard band.

Question 1 of 27070

Q

Communications with an emission of J3E would typically have a channel spacing of:

A

0.5 kHz

B

0.3 kHz

C

3.0 kHz

D

2.8 kHz

Question 1 / 27070lrLbS3yaSnqHO5CjUOvO

Question 1 of 27070lrLbS3yaSnqHO5CjUOvO

Communications with an emission of J3E would typically have a channel spacing of:

Back

Question 1 of 27070

Q

Communications with an emission of J3E would typically have a channel spacing of:

🔍 Key Concepts

• J3E emission in ITU/IMO radio communications (what type of signal it is) • Standard single-sideband (SSB) channel spacing used in maritime HF/MF bands • Relationship between bandwidth of the signal and practical channel spacing

💭 Think About

• First, identify what modulation type J3E represents in marine radio use, and whether it is wideband FM, narrowband FM, or single-sideband voice. • Think about the typical spacing between channels on marine SSB voice frequencies—are they separated by fractions of a kilohertz or by a few kilohertz? • Compare each option with what would be a realistic guard space to avoid overlap between adjacent SSB voice channels.

✅ Before You Answer

• Confirm that J3E corresponds to single-sideband suppressed-carrier telephony (voice). • Review the usual HF/MF maritime SSB channel spacing specified in ITU/IMO references (commonly several kHz, not a tiny fraction of a kHz). • Check which choice best matches a realistic spacing for SSB voice channels, allowing enough bandwidth and guard band.