An MF-HF transceiver is functioning...

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Question 1 of 20H4vgiAK0cR9ySojlAlSD

An MF-HF transceiver is functioning correctly in voice mode/SSB but not in SITOR (NBDP). What is the most likely source of the problem?

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Question 1 of 20

H4vgiAK0cR9ySojlAlSD

An MF-HF transceiver is functioning correctly in voice mode/SSB but not in SITOR (NBDP). What is the most likely source of the problem?

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🔍 Key Concepts

• MF-HF SSB voice vs. SITOR (NBDP) operation – what parts of the radio are common to both modes and what parts are unique to data modes • Filters and bandwidth – which component controls the narrower bandwidth needed for SITOR/NBDP compared to voice SSB • Internal oscillators – how an audio oscillator and a VCO are used in generating/processing SITOR tones vs. standard voice

💭 Think About

• If the radio works perfectly on SSB voice but fails only in SITOR/NBDP, which stages of the transceiver can you safely assume are probably OK? • Which option specifically affects the part of the signal path that changes between wide‑band SSB voice and narrow‑band direct‑printing (data) modes? • Ask yourself: which component, if it failed, would be most likely to affect only SITOR and not normal SSB voice operation?

✅ Before You Answer

• Identify which blocks (RF amplifiers, I.F. stages, VCO) are shared by both voice SSB and SITOR; these are less likely to be the cause if only SITOR fails. • Consider which option relates to a narrow-band filter used primarily for data modes like NBDP/SITOR rather than for standard voice. • Verify which oscillator (by frequency and function) is used to generate the SITOR tones and would be essential only when operating in NBDP mode.

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Question 1 of 20H4vgiAK0cR9ySojlAlSD

An MF-HF transceiver is functioning correctly in voice mode/SSB but not in SITOR (NBDP). What is the most likely source of the problem?

Back

Question 1 of 20

H4vgiAK0cR9ySojlAlSD

An MF-HF transceiver is functioning correctly in voice mode/SSB but not in SITOR (NBDP). What is the most likely source of the problem?

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

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