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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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只看楼主 倒序阅读 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
本主题包含附件,请 登录 后查看, 或者 注册 成为会员
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


QQ:63545177
离线BD1CM
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只看该作者 1楼 发表于: 2016-02-06
接收部分
1、ADC型号 LTC2208-14
2、ADC精度 14
3、ADC采样率 124.033MHz
4、前放 2SC3356单管
5、动态衰减器 BAP70Q
6、倍频器 FPGA内部
7、FPGA EP4CE55
8、主板双层PCB



发射部分
1、DAC 12BIT (抠门)
2、速率率 124.033MHz


主控部分
1、DSP TMS320C6745
2、MCU R7S721000VCFP
3、LCD RFE430H 480X272 电阻触摸屏



机器的唯一的USB接口不具备原始的IQ数据输入输出功能!
也没有网络接口,日本人在想什么?




[ 此帖被BD1CM在2016-02-19 21:47重新编辑 ]
本主题包含附件,请 登录 后查看, 或者 注册 成为会员
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


QQ:63545177
离线BD1CM
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3306
只看该作者 2楼 发表于: 2016-02-06
图片楼



环保的双层主板!
































[ 此帖被BD1CM在2016-02-19 21:02重新编辑 ]
本主题包含附件,请 登录 后查看, 或者 注册 成为会员
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


QQ:63545177
离线BA7KW
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16344
只看该作者 3楼 发表于: 2016-02-07
和RABBIT SDR比较的话谁强?

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离线BD1CM
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3306
只看该作者 4楼 发表于: 2016-02-07
回 BA7KW 的帖子
BA7KW:和RABBIT SDR比较的话谁强? (2016-02-07 00:27) 

您比比 机器在站长手里
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


QQ:63545177
离线爱不交租
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12274
只看该作者 5楼 发表于: 2016-02-07
这一个尸体还流转这么多手了

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离线BG7MI
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7708
只看该作者 6楼 发表于: 2016-02-07
0*03-74*80,可以收到校园广播

内容来自[手机版]
离线bh2uu
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只看该作者 7楼 发表于: 2016-02-07
7300 别像991就行 出来就出个利索的 别整得半身不遂~
离线bd1hp
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只看该作者 8楼 发表于: 2016-02-07
ICOM也学佳能在挤牙膏!
[ 此帖被bd1hp在2016-02-07 08:20重新编辑 ]
BD1HP/刘和平
离线BA7IA
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11173
只看该作者 9楼 发表于: 2016-02-07
能改成电视棒,用来收调频广播吗?

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离线bg7doz
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只看该作者 10楼 发表于: 2016-02-07
学习了,谢谢
离线BA7IA
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只看该作者 11楼 发表于: 2016-02-07
我只找的IC-7300的操作手册,没能找到其维修手册,所以很难分析出电路的其中奥妙。谁要是有这个机器的维修手册方便的话给我一份看看。

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离线BD1GO
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只看该作者 12楼 发表于: 2016-02-07
离线BD1CM
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只看该作者 13楼 发表于: 2016-02-07
回 BA7IA 的帖子
BA7IA:我只找的IC-7300的操作手册,没能找到其维修手册,所以很难分析出电路的其中奥妙。谁要是有这个机器的维修手册方便的话给我一份看看。 (2016-02-07 10:56) 

原理图纸在1楼,楼顶
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bg4qae
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只看该作者 14楼 发表于: 2016-02-07


    ICOM这么做是怕抢了自家7600的饭碗???
生存空间,不是靠乞求和抗议来实现的,而是靠铁和血来实现的!
离线bh4rxp
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只看该作者 15楼 发表于: 2016-02-07
出生决定命运!
离线BI7LNQ
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只看该作者 16楼 发表于: 2016-02-07
我觉得icom是故意这么做
离线BI7LNQ
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只看该作者 17楼 发表于: 2016-02-07
发射dac好歹弄个ad9122
离线BA7IA
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只看该作者 18楼 发表于: 2016-02-07
回  13楼(BD1CM)的帖子
第13楼BD1CM于2016-02-07 12:25发表的 回 BA7IA 的帖子 的帖子
BA7IA:我只找的IC-7300的操作手册,没能找到其维修手册,所以很难分析出电路的其中奥妙。 ..
手机看不到。

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离线BD1GO
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只看该作者 19楼 发表于: 2016-02-07
一定是故意的。

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