What is the purpose of using 8.33 kHz instead of 25 kHz …
2020年2月1日 · If you are referring to 25 kHz spacing versus 8.33 kHz spacing, it gives more channel options in radio transceivers. Ex1. There are 41 channels in the frequency space of …
25000 Hz clean pure sine wave TEST TONE 25 khz frequency
2021年8月18日 · 25000 Hz sine tone to test your speakers or headphones.Humans can detect sounds in a frequency range from about 18 Hz to 20 kHz. (Human infants can actually ...
" In the past, FCC licenses were assigned only every 25 KHz. Each assigned radio channel was allowed to use 10 KHz in bandwidth of the radio spectrum - (designated in violet). " To keep …
Communication Channel Spacing | SKYbrary Aviation Safety
Currently, two main spacing standards are used for VHF communication: 25 kHz and 8.33 kHz. The 25 kHz channel spacing was introduced in the 1970s and allows for a total of 760 …
25khz-12.5khz是什么意思？ - 百度知道
25khz-12.5khz表示25000赫兹至12500赫兹。 25khz-12.5khz是什么意思？ 25赫兹和12.5赫兹，收音机能收到，只要你和他的频率保持一致！
25khz和8.33khz，甚高频小数点后的第三位 | 飞行的苹果派
我国目前的通讯频率是50khz为间隔的（对此我没有找到具体规章，但是我检查了AIP中所有的通讯频率，确认民航只用了50khz的间隔，希望有人能帮我找到具体的规章），因此只需要小数点 …
千赫 - 百度百科
千赫，缩写是或kHz*，它是 交流电 (AC)或 电磁波 (EM)频率的单位，等于1000赫兹(1000Hz)。这个单位也用于 信号带宽 的度量和描述。
What Does The Hz-KHz Range For Speakers And Headphones Mean? - How-To Geek
2018年9月5日 · For any device that uses a standard speaker driver, the Hz-KHz value is the range of audible sound vibrations that the speaker can produce. It's generally labeled as the …
25khz=多少秒 - 百度知道
2012年5月25日 · hz是频率，25k hz就是25*1000/秒，就是一秒钟某个周期性动作发生25000次，你问的是什么呢？ 有点不清楚。 照你的问题答案也许是1/25000秒0.00004秒
12.5 vs. 25 kHz - The REAL story from Falcon Direct!
2007年2月16日 · The FCC assigns two new 12.5 kHz users on either side of your wide band 25 kHz frequency. Half the power transmitted by these new users is on YOUR FREQUENCY! So, …