What is the national calling frequency for FM simplex operations in the 2 meter band?
The correct answer is A: 146.520 MHz. This is the national calling frequency for FM simplex operations on the 2-meter band. According to standard band plans, 146.52 MHz is designated as the calling frequency where operators can make initial contact before moving to another frequency for their conversation.
This frequency is widely recognized and monitored by many operators, especially when traveling. It's the standard place to make initial contact on 2-meter FM simplex. After making contact, operators typically move to another frequency (like 146.55, 146.58, etc.) to continue their conversation, leaving 146.52 clear for others to make initial contacts.
Exam Tip
2-meter calling = 146.52 MHz. Remember: 146.52 MHz is the famous 2-meter simplex calling frequency. This is one of the most important frequencies to know.
Memory Aid
"**2**-meter **C**alling = **1**46.**5**2 (think '2C = 146.52')"
Real-World Application
You're traveling and want to make contact with local hams. You tune to 146.52 MHz and call 'CQ CQ CQ, this is Kilo Alpha One Bravo Charlie, monitoring 146.52.' A local operator responds, and after exchanging call signs, you both move to 146.55 MHz to continue your conversation, leaving 146.52 clear for others.
FCC Part 97.305Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. 145.000 MHz is not the 2-meter calling frequency. It's at the bottom of the 2-meter band but not designated as the calling frequency.
Option C: Incorrect. 432.100 MHz is in the 70-centimeter band, not the 2-meter band.
Option D: Incorrect. 446.000 MHz is in the 70-centimeter band, not the 2-meter band.
题目解析
The correct answer is A: 146.520 MHz. This is the national calling frequency for FM simplex operations on the 2-meter band. According to standard band plans, 146.52 MHz is designated as the calling frequency where operators can make initial contact before moving to another frequency for their conversation. This frequency is widely recognized and monitored by many operators, especially when traveling. It's the standard place to make initial contact on 2-meter FM simplex. After making contact, operators typically move to another frequency (like 146.55, 146.58, etc.) to continue their conversation, leaving 146.52 clear for others to make initial contacts.
考试技巧
2-meter calling = 146.52 MHz. Remember: 146.52 MHz is the famous 2-meter simplex calling frequency. This is one of the most important frequencies to know.
记忆口诀
**2**-meter **C**alling = **1**46.**5**2 (think '2C = 146.52')
实际应用示例
You're traveling and want to make contact with local hams. You tune to 146.52 MHz and call 'CQ CQ CQ, this is Kilo Alpha One Bravo Charlie, monitoring 146.52.' A local operator responds, and after exchanging call signs, you both move to 146.55 MHz to continue your conversation, leaving 146.52 clear for others.
错误选项分析
Option B: Incorrect. 145.000 MHz is not the 2-meter calling frequency. It's at the bottom of the 2-meter band but not designated as the calling frequency. Option C: Incorrect. 432.100 MHz is in the 70-centimeter band, not the 2-meter band. Option D: Incorrect. 446.000 MHz is in the 70-centimeter band, not the 2-meter band.
知识点
2-meter band, Simplex calling frequency, 146.52 MHz, National standard
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.