What is the most common method of generating...

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Question 1 of 20E0bD2zfG3t7kX4b62DA1

What is the most common method of generating a SITOR (NBDP) signal on shipboard GMDSS equipment?

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Question 1 of 20

E0bD2zfG3t7kX4b62DA1

What is the most common method of generating a SITOR (NBDP) signal on shipboard GMDSS equipment?

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🔍 Key Concepts

• SITOR (Simplex Teletype Over Radio) is a narrow-band direct-printing mode used in GMDSS for HF/MF data communications • SITOR/NBDP uses a specific type of frequency shift keying (FSK) tone pair for mark and space signals • The common ITU-standard tone spacing and audio tones for NBDP telex over HF radio

💭 Think About

• Think about how digital information (mark and space) is represented in HF radioteletype systems: is the carrier itself shifted, or are audio tones used with a suppressed carrier SSB transmitter? • Compare which choices describe a realistic and common audio tone pair used with SSB transmitters versus unusual or overly complex descriptions. • Consider standard NBDP/RTTY tone frequencies you may have memorized (commonly used mark and space audio tones and their separation).

✅ Before You Answer

• Identify which option most clearly describes two distinct audio tones (mark and space) used with an SSB transmitter and suppressed carrier. • Check which frequency separation between the tones (and/or from the carrier) matches the standard NBDP (SITOR) shift you learned in GMDSS theory (typically around a 170 Hz shift). • Eliminate any options that describe tone arrangements or offsets that are not consistent with standard FSK audio tone pairs used in HF telex services.

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Question 1 of 20E0bD2zfG3t7kX4b62DA1

What is the most common method of generating a SITOR (NBDP) signal on shipboard GMDSS equipment?

Back

Question 1 of 20

E0bD2zfG3t7kX4b62DA1

What is the most common method of generating a SITOR (NBDP) signal on shipboard GMDSS equipment?

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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