新鲜拆解利利普sds7102
刚刚到货，批次是2013年3月的，拆出来拍拍图，下午拿去改7.4V电池。 厂家改进了很多，比以前的图片好很多了，电源部份不山寨了。在阳台强光下看得很清楚。赶上直播了，顶一个。 我不会再考虑同等价位的二手TDS220了，毕竞是上世纪的产物，而且这几年国产示波器越来越好，想买2手国外的都考虑下吧。 这篇文章是老外写的：
关于带宽、噪声以及和Tek的波形比较等，个人觉得不错
关于ADC：
About ADC
SDS7102 have max samplerate 1Gs/s realtime (one channel) and 2 x 500Ms/s simultaneous for two channel.
ADC construction principle is most good what I have seen in this price class oscilloscope. Better than Hantek solution.
Owon use single chip ADC what is directly made for this speed!
(hantek use several 100MHz ADC's interleaved)
Owon ADC Chip is MXT2002 (RuiFeng China)
MXT2002 is National ADC08D500 clone. (exept case. ADC:128pin, MXT:144pin))
Some specs are slightly reduced but in my opinion not markable in this scope aplication and frequency range.
Non DES
ENOB 100MHz National typical 7.5 and clone 7.4
SNR 100MHz typical 47dB and clone 46dB
If go higher frequencies as example >200MHz then littlebit more differencies so than original win.
My opinion is: in this application differencies are not meaningfull.
National original chip is markable more expensive. (you can buy manyclone chips with one original chip price - but in critical aplicationsthese small differencies may be just enough)
Here is RuiFeng datasheet (not much text becouse can use national datasheet)
Note, you need support for chinese language, if want look all)
This ADC support directly 1Gs/s or 2x500Ms/s capturing.
Just simple change chip mode selection.
In this mode these two ADC's are internally interlieved with same clock.
This is very reliable and better way to do oscilloscope ADC than whatexample Rigol, Hantek, Atten, Siglent, GW etc. have used. ButHantek/Tekway and others basic design is old. They use same principle asRigol (etc). Several low speed ADC interleaved. Problem is timing andleveling these separate ADC's so it need lot of care that there do notrise any bad efects with timing jitter and level unbalance and otherunformity between ADC's.
This OWON solution is nearly free from these problems.
And also, this smart ADC have its own inside build low level calibration routine (it is not same as scope self calibration).
ADC is clocked with 500MHz clock and it need only one Clock source.
This clock generator is:
Analog Devices ADF4360-7 Integrated Synthesizer and VCO (350-1800MHz)
Clock reference is 10MHz.
不知道这个人为什么知道这么多，ADC MXT2002居然是仿的国半的ADC08D500 ，指标好像还可以哦！
希望使用SDS7102的人共同关注一下，视窗扩展如果能够设计的一点就好了，改成那种扫描形式的
现在的视窗拓展给我感觉就是实时快速分辨率切换了，没有别的功能，在视窗扩展中STOP后，是回不到主存储中间去的，回到主存储中也只有那么一截信号，对于观测小概率信号异常不利！ Need realize that Tektronix is old but totally different price class oscilloscope.
Owon result is very good.
In this price class I do not know any other what is as good as owon if look noise.
Still Owon have noise, of course, and it also affect to triggering stability. But also so do this Tektronix.
Due to lack of time this was only small test.
(specially becouse need add floppy disk driver to this old Tek for images and it need some improvisation becouse not original parts.)
后面还有不少，懒得贴了，如果厂家看到能够把视窗扩展改进一下那真是Happy啦！
贴一个以前用TEKMSO4054的图，同样是10M的存储，TEK就能在低速下观察不良信号： 这是原装评价：
“Owon front end signal quality is amazing good as we look 0.5kEur price class. Maybe becouse they have designed it themselves, not try make cheap copy from some other. ”
国产的能够获得这样的好评也确实不错啦！ 这是原装评价：
“Owon front end signal quality is amazing good as we look 0.5kEur price class. Maybe becouse they have designed it themselves, not try make cheap copy from some other. ”
国产的能够获得这样的好评也确实不错啦！ 屏挺大的，但是面板设计觉得有点怪。 这个型号的波形刷新率是个悲剧，可能是内存太大的原因 赶上直播了，顶一个。 看不懂英文，哪个高人能够翻译一下。
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jimy0238: (2013-03-0820:50) images/back.gif刚刚改装了6节18650电池， 3并， 再2段串起来，找了一个输出3A的保护板，能平衡充。 哈哈。正在测试 关注电池测试结果 电池改装实测，60%背光，4个半小时。 拍多点相片就好了，相片太少
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radioham:系列号是什么？owon太不严谨来吧 (2013-03-1610:04) images/back.gif"序列号:， 估计写代码的人是用拼音输入法 一直关注着，现在有新的升级型号出来了 楼主；片片太少了，，，，一年了，使用情况如何呢？？？
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