What is the image frequency if the normal...

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Question 1 of 20mWs4NZ6m6R0ychbZWkey

What is the image frequency if the normal channel is 151.000 MHz, the IF is operating at 11.000 MHz, and the LO is at 140.000 MHz?

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Question 1 of 20

mWs4NZ6m6R0ychbZWkey

What is the image frequency if the normal channel is 151.000 MHz, the IF is operating at 11.000 MHz, and the LO is at 140.000 MHz?

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🔍 Key Concepts

• Superheterodyne receiver operation and how the local oscillator (LO), intermediate frequency (IF), and received (RF) frequency are related • Formula for image frequency: how far the image is from the LO compared to the desired RF signal • Difference between high-side and low-side injection of the LO relative to the received channel

💭 Think About

• First, write the basic relationship between LO, RF (normal channel), and IF for this receiver. Is the LO higher or lower than the normal channel in this problem? • Once you know how LO, RF, and IF are related, think about where the image must be so that it produces the same IF when mixed with the LO. • Compare how far the normal channel is from the LO and then see where another frequency at the same offset (on the opposite side) would fall.

✅ Before You Answer

• Confirm whether the receiver is using low-side or high-side LO injection based on the numbers given (151 MHz vs 140 MHz). • Check that the difference between the LO and the normal channel equals the given IF (11 MHz). • Compute the frequency on the other side of the LO at the same IF offset and make sure it matches one of the choices exactly.

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Question 1 of 20mWs4NZ6m6R0ychbZWkey

What is the image frequency if the normal channel is 151.000 MHz, the IF is operating at 11.000 MHz, and the LO is at 140.000 MHz?

Back

Question 1 of 20

mWs4NZ6m6R0ychbZWkey

What is the image frequency if the normal channel is 151.000 MHz, the IF is operating at 11.000 MHz, and the LO is at 140.000 MHz?

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