英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
146查看　146　在百度字典中的解释百度英翻中〔查看〕
146查看　146　在Google字典中的解释Google英翻中〔查看〕
146查看　146　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Is the National Calling Frequency actually used?
    146 520 MHz is the national calling frequency for FM voice It's a "simplex" frequency, meaning that you call on this frequency and then listen for a reply on the same frequency (It is "national" in the US, but that does not guarantee that many people are actively monitoring this frequency!
  • united states - Whats the difference between national calling . . .
    The simplex calling frequencies (146 520 446 000 Mhz) are intended for FM simplex communication, while the other pair (144 200 432 100) are for SSB In general use, the term "simplex" implies FM modulation since FM is commonly used in both simplex and duplex operation
  • What is a calling frequency? - Amateur Radio Stack Exchange
    So, calling frequencies are well used For example, on 2-meters, you can agree to meet someone on 146 52 (2 meter simplex FM calling frequency) and then when contact is made QSY to some other open frequency It is not polite to tie up the calling frequency When I am mobile, the only VHF ops I do is hanging out on the 2-meter calling frequency
  • Why is there a repeater on 146. 46? Isnt that a simplex frequency?
    SERA Band Plan 146 400 - 146 585 includes " alternate repeater inputs" that covers my question perfectly The ARRL ought to provide the advice you've offered to everyone on their site, IMO The club rep told me "We can't hear you on 146 460 but the repeater can with a tower on top of the mountain " so I thought the frequency was clear
  • Calculating Antenna Length on the FCC Exam vs. in Reality
    If you find the wavelength for the given frequency, then just find the type of antenna (quarter-wave), take the appropriate fraction of the wavelength, and convert said quantity to the appropriate units For example, the wavelength for a 146 MHz signal is 2 05 m, multiply by 39 and you have 80 inches
  • Should I chose a vertical or a horizontal HF antenna?
    Stack Exchange Network Stack Exchange network consists of 183 Q A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers
  • united states - Choosing simplex frequency as a technician - Amateur . . .
    146 52 National Simplex Calling Frequency; 147 42-147 57 Simplex; 70 cm 432 10 70-cm calling frequency
  • digital modes - Help Identifying RF Data Protocol - Amateur Radio Stack . . .
    I hope this is the correct place to ask At my university, we've been picking up some strange transmissions on 146 66625 MHz in the engineering buildings The noise persists at nearly full strength between 146 66125 and 146 67125 before completely dropping off Using directional finding we've isolated it to a large steam pipe in the basement
  • rfi - Strange interference - Amateur Radio Stack Exchange
    While studying for the Technician exam I've been listening, mostly on 10 meters, and I've noticed an odd interference pattern - every 145-146 KHz I hear a steady series of beeps or chirps I've hear them at 28 134 MHz, 28 280 MHz, 28 425 MHz, and 28 571 MHz
  • Spacing between elements on a Yagi antenna
    I built a 146 MHz 3 element beam following instructions, and the spacing was 16" between the driven element and the reflector and 20" between the driven element and the director I was just wondering how you determine the proper spacing between elements; is there any set formula you use to determine boom length, element spacing, etc that you





中文字典-英文字典  2005-2009