If a receiver mixes a 13.8 MHz VFO with a...

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Question 1 of 209DULwgmFA2x9u8xGHtDf

If a receiver mixes a 13.8 MHz VFO with a 14.255 MHz receive signal to produce a 455 kHz intermediate frequency signal, what type of interference will a 13.345 MHz signal produce in the receiver?

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Question 1 of 20

9DULwgmFA2x9u8xGHtDf

If a receiver mixes a 13.8 MHz VFO with a 14.255 MHz receive signal to produce a 455 kHz intermediate frequency signal, what type of interference will a 13.345 MHz signal produce in the receiver?

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🔍 Key Concepts

• Mixer products in a superheterodyne receiver (sum and difference frequencies) • Relationship between RF signal, local oscillator (VFO) frequency, and intermediate frequency (IF) • How an image frequency is defined relative to the LO and IF

💭 Think About

• First, write the two mixer outputs you get when you mix the 13.8 MHz VFO with the 14.255 MHz receive signal. Which one equals the 455 kHz IF? • Next, using that same LO (13.8 MHz) and IF (455 kHz), calculate the frequency on the other side of the LO that would also mix to 455 kHz. • Compare that "other" frequency to the 13.345 MHz signal in the question. What kind of response does that suggest?

✅ Before You Answer

• Be sure you are using absolute difference when finding IF: ( f_{IF} = |f_{RF} - f_{LO}| ) • Confirm both possible RF frequencies that can produce the same 455 kHz IF with a 13.8 MHz LO. • Check the definition of an image frequency: a second RF frequency that also converts to IF and can be received unintentionally.

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Question 1 of 209DULwgmFA2x9u8xGHtDf

If a receiver mixes a 13.8 MHz VFO with a 14.255 MHz receive signal to produce a 455 kHz intermediate frequency signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Back

Question 1 of 20

9DULwgmFA2x9u8xGHtDf

If a receiver mixes a 13.8 MHz VFO with a 14.255 MHz receive signal to produce a 455 kHz intermediate frequency signal, what type of interference will a 13.345 MHz signal produce in the receiver?

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