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前端电压调节

10*400pxl	档位(vdiv)	增益(gain)	衰减(atten)	偏置输入(adc_input)	偏置输出(adc_output)	偏置衰减(adc_atten)	DAC输入
±40mv	1 mv/div	100	1		±40mv	10	±40mv
±80mv	2 mv/div	50	1		±80mv	10	±80mv
±200mv	5 mv/div	20	1		±200mv	10	±200mv
±400mv	10 mv/div	10	1		±400mv	10	±400mv
±800mv	20 mv/div	5	1		±80mv	1	±80mv
±2v	50 mv/div	2	1		±200mv	1	±200mv
±4v	0.1V /div	1	1		±400mv	1	±400mv
±8v	0.2V /div	50	100		±80mv	10	±400mv
±20v	0.5V /div	20	100		±200mv	10	±400mv
±40v	1 V /div	10	100		±400mv	10	±400mv
±80v	2 V /div	5	100		±80mv	1	±400mv
±200v	5 V /div	2	100		±200mv	1	±400mv
±400v	10 V /div	1	100		±400mv	1	±400mv

计算方法：

output = (input/atten + adc_output/adc_atten) * gain ±400mv = (input/[100~1] + adc_output/[10~1] ) * [1~100] ±400mv = [ adc_output / adc_atten ] * gain

1. vdiv调节

   增益、衰减、偏置衰减变化

2. yoffset调节

   偏置输入变化 用户最多可产生的偏置输出见偏置输出(adc_output)栏

\[J_\alpha(x) = \sum\limits_{m=0}^\infty \frac{(-1)^m}{m! \, \Gamma(m + \alpha + 1)}{\left({\frac{x}{2}}\right)}^{2 m + \alpha}\] \[\frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\ldots} } } }\] \[\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)\] \[\begin{aligned} \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} = \frac{4\pi}{c}\vec{\mathbf{j}} \ \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho \ \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} = \vec{\mathbf{0}} \ \nabla \cdot \vec{\mathbf{B}} = 0 \end{aligned}\]