What is the function of a decade counter?
The correct answer is A: It produces one output pulse for every 10 input pulses. What is the function of a decade counter is that it produces one output pulse for every 10 input pulses. Decade counters divide by 10. For amateur radio operators, this is important for digital circuits. Understanding this helps when using counters.
Exam Tip
Decade counter function = produces one output pulse for every 10 input pulses. Think 'D'ecade 'C'ounter = 'D'ivides by '1'0. Decade counters divide by 10. Not decoding, not 10 outputs - just 1 output for 10 inputs.
Memory Aid
"Decade counter function = produces one output pulse for every 10 input pulses. Think 'D'ecade 'C'ounter = 'D'ivides by '1'0. Decade counters divide by 10. Important for digital circuits."
Real-World Application
A decade counter: Its function is to produce one output pulse for every 10 input pulses. This divides the input frequency by 10. This is the function - 1 output for 10 inputs.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Decoding decimal number for seven-segment display isn't the function - decade counter divides by 10. Decoding isn't the function.
Option C: Incorrect. Producing 10 output pulses for every input pulse isn't correct - decade counter produces 1 output for 10 inputs. 10 outputs isn't correct.
Option D: Incorrect. Decoding binary number for seven-segment display isn't the function - decade counter divides by 10. Binary decoding isn't the function.
题目解析
The correct answer is A: It produces one output pulse for every 10 input pulses. What is the function of a decade counter is that it produces one output pulse for every 10 input pulses. Decade counters divide by 10. For amateur radio operators, this is important for digital circuits. Understanding this helps when using counters.
考试技巧
Decade counter function = produces one output pulse for every 10 input pulses. Think 'D'ecade 'C'ounter = 'D'ivides by '1'0. Decade counters divide by 10. Not decoding, not 10 outputs - just 1 output for 10 inputs.
记忆口诀
Decade counter function = produces one output pulse for every 10 input pulses. Think 'D'ecade 'C'ounter = 'D'ivides by '1'0. Decade counters divide by 10. Important for digital circuits.
实际应用示例
A decade counter: Its function is to produce one output pulse for every 10 input pulses. This divides the input frequency by 10. This is the function - 1 output for 10 inputs.
错误选项分析
Option B: Incorrect. Decoding decimal number for seven-segment display isn't the function - decade counter divides by 10. Decoding isn't the function. Option C: Incorrect. Producing 10 output pulses for every input pulse isn't correct - decade counter produces 1 output for 10 inputs. 10 outputs isn't correct. Option D: Incorrect. Decoding binary number for seven-segment display isn't the function - decade counter divides by 10. Binary decoding isn't the function.
知识点
Function, Decade counter, Produces one output pulse, Every 10 input pulses
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.