What is the assigned bandwidth and channel...

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Question 1 of 20urkO7uApRJZt7wBpKoC2

What is the assigned bandwidth and channel spacing for J2B SITOR (NBDP) transmissions?

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Question 1 of 20

urkO7uApRJZt7wBpKoC2

What is the assigned bandwidth and channel spacing for J2B SITOR (NBDP) transmissions?

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🔍 Key Concepts

• SITOR (NBDP) emission designator J2B and what each part of that designator means • Typical frequency shift and channel spacing used for narrow-band direct-printing telegraphy in MF/HF maritime radio • Distinction between signal bandwidth (occupied bandwidth) and channel spacing in ITU allocations

💭 Think About

• First, recall the standard frequency-shift keying (FSK) values used for NBDP/SITOR in the MF/HF maritime bands. Which value in the choices looks like a common FSK shift? • Next, think about how much spectrum a narrow-band telex signal actually needs. Which options are clearly too wide for a narrow-band telegraphy mode? • Compare the smaller numeric pair in each answer: which pair looks like a realistic shift + channel spacing used to pack many telex channels into a small band?

✅ Before You Answer

• Confirm the typical FSK shift value used for maritime NBDP (SITOR) in ITU-R recommendations. • Check that the channel spacing is significantly larger than the shift to allow for guard band between channels. • Eliminate options whose bandwidth values are more appropriate for SSB voice (around 2.4–3 kHz) rather than narrow-band telegraphy.

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Question 1 of 20urkO7uApRJZt7wBpKoC2

What is the assigned bandwidth and channel spacing for J2B SITOR (NBDP) transmissions?

Back

Question 1 of 20

urkO7uApRJZt7wBpKoC2

What is the assigned bandwidth and channel spacing for J2B SITOR (NBDP) transmissions?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

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