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IC-7300电路分析 [复制链接]

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离线BD1CM
 
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3306
只看楼主 正序阅读 0楼 发表于: 2016-02-06






IC-7300



HF/50MHz TRANSCEIVER

features




The Innovative HF Transceiver


This device has not been approved by the Federal Communications Commission. This device may not be sold or leased, or be offered for sale or lease, until approval of the FCC has been obtained. New technology is changing the way receivers are being designed and the IC-7300 is an industry first as an RF, Direct Sampling System is being used in an entry level HF radio. The ability to digitize RF before various receiver stages reduces the inherent noise that is generated in the different IF stages of a radio. We feel the performance of the ‘7300 will far exceed your expectations for a radio considered entry level.


Output power:

100W (25W AM)


RX Frequencies:

0.030-74.800


Receiver type:

Direct sampling


RF direct sampling system

The IC-7300 employs an RF direct sampling system, where RF signals are directly convert to digital data. Then processed in the FPGA (Field-Programmable Gate Array), making it possible to simplify the circuit construction as well as reduce noise that can mask weak signals.The new “IP+” improves the 3rd order intercept point (IP3) performance improving the ability to copy a weak signal that is adjacent to either a strong interfering signal. In this process, A/D converter is optimized to reduce or eliminate signal distortion.



RMDR and phase noise characteristics

The IC-7300’s RMDR is about 97dB* (typical value) improving the Phase Noise characteristics by about 15dB (at 1 kHz frequency separation). The superior Phase Noise characteristics reduce noise components for both receive and transmit signals.
* At 1 kHz frequency separation (received frequency: 14.2MHz, MODE: CW, IF BW: 500Hz)



15 discrete band-pass filters

The RF Direct Sampling is protected by an array of bandpass filters. The signal passes through one of the fifteen bandpass filters, where signals outside the passband are rejected. To reduce the insertion loss, the IC-7300 utilizes High Q factor coils.

Large color touch screen

The large 4.3” color TFT touch LCD offers intuitive operation of functions, settings, and various operational visual aids such as the band scope, waterfall function, and audio scope.Like on the high-end rigs, the waterfall shows a change of signal strength over a period of time and allows you to find weak signals that may not be apparent on the spectrum scope.Use the audio scope function to observe various AF TX/RX characteristics such as microphone compressor level, filter width, notch filter width and keying waveform in the CW mode. Image below shows the Audio scope with the waterfall function and the oscilloscope.
Touch screen display
Waterfall function
Audio scope function

Real-Time spectrum scope

You no longer have to choose whether to listen to the audio or have the spectrum scope sweep for signals as the IC-7300’s real-time spectrum scope offers the simultaneous operations found in some of the more expensive rigs! This means you can use either the spectrum scope or the waterfall to quickly move to an intended signal while listening to the receiver audio. The ‘7300’s touch screen introduces a “Magnify” function. So, when you first touch the scope screen around the intended signal, the touched part is magnified. A second touch of the scope screen changes the operating frequency and allows you to accurately tune.

Spectrum scope specifications

Scope systemFFT (Fast Fourier Transform)
Sweep speedMax. 30 frames/second (approx.), selectable from slow, mid or fast
Span width5kHz–1000kHz
Resolution1 pixel minimum (approximately)
Waveform display area (vertical axis)80dB
Reference level adjustment–20dB to +20dB
Peak level hold function (Max. hold)ON/OFF/last 10 seconds
Other functionsAveraging indication
Touch screen operation
VBW (Video Band Width) adjustment


Additional Features:

  • Built-in automatic antenna tuner
  • 101 channels (99 regular, 2 scan edges)
  • SD memory card slot for saving data
  • Cooling fan system
  • Multi-function meter
  • CW functions: full break-in, CW reverse, CW auto tuning
  • SSB, CW, RTTY, AM, FM modes
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uH = 25330/ (MHZ x MHZ x pF).  pF = 25330/( MHZ x MHZ x uH).
严肃认真、周到细致、稳妥可靠、万无一失,虽然我们可能做不到万无一失,但是我们尽人事、听天命……

https://uk.groups.yahoo.com/neo/groups/S9-C_SDR/info


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离线法国医生
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138
只看该作者 117楼 发表于: 2021-01-27
已经涨价,还好我涨价前买的。。。
呼号:BG2RDQ
E-MAIL:edwardlou@163.com
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离线BG4IHP
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1822
只看该作者 116楼 发表于: 2020-01-03
完,这是不是表示 7300要涨价了,需要的快入手。
山东 济南 经七路

更喜欢听.
离线bh4ezh
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只看该作者 114楼 发表于: 2020-01-03
这个作者谈到“还过的去的性能”。。。7300比起7610都相差无几。1w以内哪有比他性能好的HF机器。。。大家自己搜索以下icom 7610官方技术报告有三部分, 中间谈到 对比7300都把7600秒了。。。和7610相差很小了。
离线永远的FM
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11507
只看该作者 113楼 发表于: 2019-11-05
最近在设计SDR,翻出这个帖子,因为我用的ADC是LTC2209,跟7300的ADC类似,也是用FPGA内部PLL直接驱动,但FPGA的PLL核给出的时钟特性在150MHz时抖动达到100pS以上,这个直接给ADC出来信噪比恶化严重。看了下前面对7300介绍,在ADC时钟前有窄带滤波器,通过这个是不是能降低时钟抖动?原计划要给自己ADC加一个低抖动时钟发生器,输出抖动最低能达到40fS,但电路感觉太复杂,成本也高,还没下手。
BH7JUO 邱工 广东 珠海
4个鸡的900M 136叁12幺0捌42 微信 bh7juo
定制抗中波干扰的短波高通滤波器,1.5KW/100W业余段带通滤波器,20-15-10米波段1.5KW/200W三工合路器,欢迎砸单
离线bd2dp
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只看该作者 112楼 发表于: 2019-08-24
回 chenerbox 的帖子
chenerbox:缺点是不少, 买的人也不少, flex 是好, 可惜那价格在那呢
7300优点  体积小 ,和icom 725A 718,一样的大小, 实用的瀑布图,方便的操作,带天调, 加上过得去的性能, 那些缺点也只能无 .. (2019-08-12 08:00) 

可以理解
离线chenerbox
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1069
只看该作者 111楼 发表于: 2019-08-12
缺点是不少, 买的人也不少, flex 是好, 可惜那价格在那呢

7300优点  体积小 ,和icom 725A 718,一样的大小, 实用的瀑布图,方便的操作,带天调, 加上过得去的性能, 那些缺点也只能无视了







BH4VEP
离线bg3uda
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109
只看该作者 110楼 发表于: 2018-02-26
顶起来!
BG3UDA   醋都清徐欢迎你!
设备:ICOM-7300  FT-891  FT-1000mp   FT-8900  VEV-889   TH-F6A  FT3DR  
天线:正V750   清徐中继:439.750-7.1(C4FM)  439.300-8 亚音88.5 (p25)
QQ:121457062   电话:18635586388
操作证:B000002081
地址:www.qrz.cn
离线BD7BS
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903
只看该作者 109楼 发表于: 2018-01-07
有好多美欧的机器不提供电路图和维修手册,你怎么去判断?价格动咯几万国内没有几台,你怎么去判断?
ICOM IC7100交流QQ群:310079921
离线bd7jjq
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33
只看该作者 108楼 发表于: 2017-10-16
7300的硬件电路,有没有可以摩机优化改进的地方?
BD7JJQ     广东深圳
离线朱宏帅
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170
只看该作者 107楼 发表于: 2017-07-23
谢谢,我试试
姓名:朱宏帅
呼号:BG2UAW
电话:13354168848
工作地址:辽宁省锦州市广厦电子市场B区21#          
              *诚恳守信  实事求是*
离线bg2ukx
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只看该作者 106楼 发表于: 2017-07-20
回 朱宏帅 的帖子
朱宏帅:IC7300怎么进入升级模式?请高人指点 (2017-07-20 12:31) 

应该是考到卡里升级具体也忘了
BG2UKX
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离线zhaoyuan
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14
只看该作者 105楼 发表于: 2017-07-20
系统的架构和易用
离线朱宏帅
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170
只看该作者 104楼 发表于: 2017-07-20
IC7300怎么进入升级模式?请高人指点
姓名:朱宏帅
呼号:BG2UAW
电话:13354168848
工作地址:辽宁省锦州市广厦电子市场B区21#          
              *诚恳守信  实事求是*
离线朱宏帅
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170
只看该作者 103楼 发表于: 2017-07-20
谢谢,我看看去
姓名:朱宏帅
呼号:BG2UAW
电话:13354168848
工作地址:辽宁省锦州市广厦电子市场B区21#          
              *诚恳守信  实事求是*
离线VR2KW
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3110
只看该作者 102楼 发表于: 2017-07-18
回 朱宏帅 的帖子
朱宏帅:7300升级固件谁有?需用一份 (2017-07-18 12:34) 

http://www.icom.co.jp/world/support/download/firm/index.html
离线朱宏帅
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170
只看该作者 101楼 发表于: 2017-07-18
7300升级固件谁有?需用一份
姓名:朱宏帅
呼号:BG2UAW
电话:13354168848
工作地址:辽宁省锦州市广厦电子市场B区21#          
              *诚恳守信  实事求是*
离线BH7OJ
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3093
只看该作者 100楼 发表于: 2016-10-02
可惜Ios比安卓要好得多,无论是从整个系统的架构和易用,还是从APP的安全和手机硬件的使用寿命周期, Ios都比安卓好,可惜唯一缺点就是IPHONE贵,安卓便宜。
我要鼓起所有的勇气
额……
我鼓过了
可惜没有……
离线汤圆
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1157
只看该作者 99楼 发表于: 2016-10-02
我这么认为------->
作为用户 我才不管是不是什么技术 我用的开心特别重要  我们明知道iphone的 cpu 内存都不高 价格很高 但是用起来舒服 省心            ////////////// 老专家自寻烦恼的节奏  他就是一台中端 或者说中低端的短波机  要什么自行车
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