What is the allowed frequency tolerance for...

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Question 1 of 20d2gsTh8ZL2bKpaxbePKR

What is the allowed frequency tolerance for the DSC carrier frequencies?

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d2gsTh8ZL2bKpaxbePKR

What is the allowed frequency tolerance for the DSC carrier frequencies?

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🔍 Key Concepts

• Digital Selective Calling (DSC) technical requirements in GMDSS equipment standards • Difference between absolute frequency offset in Hz and relative accuracy in parts per million (ppm) • ITU / IMO performance standards for VHF/MF/HF DSC transmitters

💭 Think About

• First decide whether the requirement is usually expressed as a fixed number of hertz or as a relative error (parts per million) for modern synthesized radios • Think about how much error is acceptable so that coast stations and ships can still reliably decode DSC calls on very narrow-band channels • Compare what a ppm requirement would mean in hertz at a typical DSC frequency (for example around 2 MHz or 8 MHz) to see which options are realistic

✅ Before You Answer

• Check whether DSC equipment standards specify frequency tolerance in ppm rather than just in hertz • Convert the ppm options to hertz at a representative HF or VHF frequency and ask: would this stay inside the channel and meet DSC decoding requirements? • Verify in current GMDSS/DSC equipment specification or relevant ITU‑R recommendation what numeric tolerance is given for the DSC transmitter carrier

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Question 1 of 20d2gsTh8ZL2bKpaxbePKR

What is the allowed frequency tolerance for the DSC carrier frequencies?

Back

Question 1 of 20

d2gsTh8ZL2bKpaxbePKR

What is the allowed frequency tolerance for the DSC carrier frequencies?

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

— No credit card needed