Modern reserve transmitters are solid-state...

Question 1 / 20kWm9MmwVEbdLPwpyCEMv

Question 1 of 20kWm9MmwVEbdLPwpyCEMv

Modern reserve transmitters are solid-state designs and transmit using only A2 modulation. When measuring transmitter center frequency, what precaution must be taken:

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Question 1 of 20

kWm9MmwVEbdLPwpyCEMv

Modern reserve transmitters are solid-state designs and transmit using only A2 modulation. When measuring transmitter center frequency, what precaution must be taken:

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🔍 Key Concepts

• A2 modulation meaning (continuous carrier amplitude modulated with a tone) • How sidebands are created and how to make a "pure" carrier for frequency measurement • Which transmitter parameter you can safely change in normal testing without damaging equipment

💭 Think About

• When you want to measure the center frequency of a transmitter, do you want sidebands present or do you want as close to a single carrier as possible? • Which of the listed actions directly affects the presence of modulation sidebands, and which ones mainly affect power level or antenna characteristics? • Which option sounds like a standard test-lab procedure you could repeat safely on many units, rather than something extreme or unusual?

✅ Before You Answer

• Be clear on what A2 modulation is and how modulation depth affects sidebands. • Identify which choice, if any, actually changes modulation rather than antenna or power amplifier hardware. • Ask yourself: for a frequency counter or service monitor reading, what condition on the signal makes the reading most accurate?

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Question 1 of 20

Modern reserve transmitters are solid-state designs and transmit using only A2 modulation. When measuring transmitter center frequency, what precaution must be taken:

Antenna must be grounded to suppress spurious side-lobes

Modulation must be reduced to zero to eliminate sidebands

Voltage to the PA must be kept at half-value

Antenna current must be reduced to about 2.5 uA

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Question 1 / 20kWm9MmwVEbdLPwpyCEMv

Question 1 of 20kWm9MmwVEbdLPwpyCEMv

Modern reserve transmitters are solid-state designs and transmit using only A2 modulation. When measuring transmitter center frequency, what precaution must be taken:

Back

Question 1 of 20

kWm9MmwVEbdLPwpyCEMv

Modern reserve transmitters are solid-state designs and transmit using only A2 modulation. When measuring transmitter center frequency, what precaution must be taken:

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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