As shown in the illustrated block diagram...

Question 1 / 205eccefa4bacbc34ba4d48289

Question 1 of 205eccefa4bacbc34ba4d48289

As shown in the illustrated block diagram for an automatic radio direction finder, what will happen when the control signal amplifier output goes to zero null? See illustration EL-0199.

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Question 1 of 20

5eccefa4bacbc34ba4d48289

As shown in the illustrated block diagram for an automatic radio direction finder, what will happen when the control signal amplifier output goes to zero null? See illustration EL-0199.

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🔍 Key Concepts

• Automatic radio direction finder (ADF) servo loop and how it seeks a null signal from the loop antenna • Role of the control signal amplifier as an error signal that drives the servo-motor rotor • What happens in a closed-loop servo system when the error signal becomes zero (system is in balance or at null)

💭 Think About

• Trace the signal path from the loop antenna through the receiver, then into the servo detector & filter, control signal amplifier, and finally to the servo-motor control stator winding. How does this path influence the rotor motion? • In a typical servo system, the motor speed and direction depend on the magnitude and polarity of the error signal. If that driving error signal becomes zero, what torque is left to change the motor’s motion? • Look at the purpose of the ADF: to turn the goniometer until the received signal is at minimum (null). Once the null is reached, what must the rotor do to hold that bearing?

✅ Before You Answer

• Verify that the control signal amplifier output is the only electrical drive going to the control stator winding that produces torque on the rotor. • Consider that the magnitude of this output controls motor speed (large error = higher speed, small error = slower). What does zero magnitude imply for motor torque? • Eliminate choices that would require a non-zero or changing error signal (such as continuous acceleration, reversing, or oscillation). Focus on what condition corresponds to a stable null.

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Question 1 of 20

As shown in the illustrated block diagram for an automatic radio direction finder, what will happen when the control signal amplifier output goes to zero null? See illustration EL-0199.

The servo-motor rotor will stop.

The servo-motor rotor will increase in speed.

The servo-motor rotor will reverse direction.

The servo-motor rotor will oscillate back and forth in changing direction of rotation.

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Question 1 / 205eccefa4bacbc34ba4d48289

Question 1 of 205eccefa4bacbc34ba4d48289

As shown in the illustrated block diagram for an automatic radio direction finder, what will happen when the control signal amplifier output goes to zero null? See illustration EL-0199.

Back

Question 1 of 20

5eccefa4bacbc34ba4d48289

As shown in the illustrated block diagram for an automatic radio direction finder, what will happen when the control signal amplifier output goes to zero null? See illustration EL-0199.

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?

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