Electronic Engineer Discuss

Title: A/C and D/C coupling support [Print this page]

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Author: CYH2018    Time: 2022-12-15 08:48
Title: A/C and D/C coupling support
Dear sir/madam
I bought my hantek 6022BE oscilloscope, Amperage clamp and attenuator. My problem is if l download software from disk does not support A/C and D/C coupling even to use Amperage clamp.Thanks in advance

Sent from my Huawei phone

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Author: CYH2018    Time: 2022-12-15 08:50

Dear Sir,

Greeting from Hantek.

Yes,  The  6022BE does not support A/C coupling.

Have a nice day.

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Author: 含光左卫    Time: 2023-7-4 17:00
a/c coupling can achieve in digital way. like this:

1. #信号去除0点：
   
2. def dc2ac(signal):
   
3.     # 下面，将对应信号转至频域消除0点后转回时域
   
4.     x = signal
   
5.     # 傅里叶变换
   
6.     X = np.fft.fft(x)  # 计算原始信号的傅里叶变换
   
7.     # 去除直流分量
   
8.     X[0] = 0;
   
9.     # 幅角变换
   
10.     phase_shift = np.zeros(len(X))
    
11.     phase_shift[len(X)//2] = -np.angle(X[len(X)//2])
    
12.     X_corrected = X * np.exp( 1j * phase_shift)
    
13.     # 转回时域
    
14.     x_withoutDC = np.real(np.fft.ifft(X_corrected));
    
15.     return x_withoutDC;

Copy the Code

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