A superheterodyne receiver is adjusted to...

Question 1 / 27070ldjQhf9Xl6iMlxhnPfAb

Question 1 of 27070ldjQhf9Xl6iMlxhnPfAb

A superheterodyne receiver is adjusted to 2738 kHz. The IF is 475 kHz. What is the grid circuit of the second detector tuned to?

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Question 1 of 27070

A superheterodyne receiver is adjusted to 2738 kHz. The IF is 475 kHz. What is the grid circuit of the second detector tuned to?

🔍 Key Concepts

• Superheterodyne receiver: how incoming RF is converted to an intermediate frequency (IF) • Relationship between RF frequency, local oscillator frequency, and IF (sum and difference products) • Role of the second detector (demodulator) and what frequency it must receive to recover audio

💭 Think About

• First, figure out which frequency in the set-up is the intermediate frequency (IF) and which one is the incoming radio frequency (RF) carrier. • Ask yourself: in a superheterodyne, is the second detector usually tuned to the RF, the local oscillator, or the IF? • Once you know that, compare that required frequency to each answer choice and decide which makes sense for a detector that is extracting audio from the signal.

✅ Before You Answer

• Verify what IF (intermediate frequency) actually means in a superhet: the fixed frequency produced after mixing RF and local oscillator. • Confirm that the second detector (demodulator) works on the fixed IF signal, not directly on the original RF carrier or the oscillator frequency. • Check which answer choice corresponds exactly to the IF identified in the problem statement before selecting.

Question 1 of 27070

A superheterodyne receiver is adjusted to 2738 kHz. The IF is 475 kHz. What is the grid circuit of the second detector tuned to?

475 kHz

950 kHz

2263 kHz

3213 kHz

Question 1 / 27070ldjQhf9Xl6iMlxhnPfAb

Question 1 of 27070ldjQhf9Xl6iMlxhnPfAb

A superheterodyne receiver is adjusted to 2738 kHz. The IF is 475 kHz. What is the grid circuit of the second detector tuned to?

Back

Question 1 of 27070

A superheterodyne receiver is adjusted to 2738 kHz. The IF is 475 kHz. What is the grid circuit of the second detector tuned to?