What is a transceiver?
The correct answer is A: A device that combines a receiver and transmitter. A transceiver is a single unit that combines both a receiver and a transmitter in one package, sharing common circuits like oscillators, filters, and power supplies. This design is more efficient and compact than separate receiver and transmitter units. For amateur radio operators, transceivers are the standard equipment used for most operations, allowing you to both receive and transmit on the same frequency band. Modern transceivers automatically switch between receive and transmit modes, typically using a TR (transmit/receive) relay or solid-state switching. Understanding what a transceiver is helps when selecting equipment and understanding station setup.
Exam Tip
Transceiver = Transmitter + Receiver combined. Think 'T'ransceiver = 'T'ransmitter + re'C'eiver in one unit. It's the combination, not impedance matching, code decoding, or frequency conversion.
Memory Aid
"Transceiver = Transmitter + Receiver. Think 'T'ransceiver = 'T'ransmitter + re'C'eiver combined in one device. Single unit for both RX and TX."
Real-World Application
Your VHF/UHF transceiver combines both receive and transmit functions. When you press PTT, it switches from receive to transmit mode automatically. When you release PTT, it switches back to receive. This single unit handles both functions, making it convenient and efficient compared to separate receiver and transmitter units. Most modern amateur radio equipment is built as transceivers.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Matching feed line impedance to 50 ohms is the function of an antenna tuner or matching network, not a transceiver. Transceivers have 50-ohm outputs, but they don't match impedance.
Option C: Incorrect. Automatically sending and decoding Morse code is the function of a computer or specialized decoder, not a transceiver. Transceivers can be used with such devices but don't include this function.
Option D: Incorrect. Converting frequencies to another band is the function of a transverter, not a transceiver. Transceivers operate on their designed bands.
题目解析
The correct answer is A: A device that combines a receiver and transmitter. A transceiver is a single unit that combines both a receiver and a transmitter in one package, sharing common circuits like oscillators, filters, and power supplies. This design is more efficient and compact than separate receiver and transmitter units. For amateur radio operators, transceivers are the standard equipment used for most operations, allowing you to both receive and transmit on the same frequency band. Modern transceivers automatically switch between receive and transmit modes, typically using a TR (transmit/receive) relay or solid-state switching. Understanding what a transceiver is helps when selecting equipment and understanding station setup.
考试技巧
Transceiver = Transmitter + Receiver combined. Think 'T'ransceiver = 'T'ransmitter + re'C'eiver in one unit. It's the combination, not impedance matching, code decoding, or frequency conversion.
记忆口诀
Transceiver = Transmitter + Receiver. Think 'T'ransceiver = 'T'ransmitter + re'C'eiver combined in one device. Single unit for both RX and TX.
实际应用示例
Your VHF/UHF transceiver combines both receive and transmit functions. When you press PTT, it switches from receive to transmit mode automatically. When you release PTT, it switches back to receive. This single unit handles both functions, making it convenient and efficient compared to separate receiver and transmitter units. Most modern amateur radio equipment is built as transceivers.
错误选项分析
Option B: Incorrect. Matching feed line impedance to 50 ohms is the function of an antenna tuner or matching network, not a transceiver. Transceivers have 50-ohm outputs, but they don't match impedance. Option C: Incorrect. Automatically sending and decoding Morse code is the function of a computer or specialized decoder, not a transceiver. Transceivers can be used with such devices but don't include this function. Option D: Incorrect. Converting frequencies to another band is the function of a transverter, not a transceiver. Transceivers operate on their designed bands.
知识点
Transceivers, Receiver and transmitter combination, Radio equipment, Station setup
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.