Problems with vertical possition calibration (deflection)
Posted: Wed May 17, 2017 1:22 pm
Hello
I bought new oscilloscope DSO112A in Electronic DIY Club (Aliexpress) store one month ago. It have problem with vertical position calibration (it problem was from first time). When input terminal is set to DC or AC, without input signal oscilloscope shown input voltage ~0,4 V (it depend of sensitivity selections). I tried Default and VPos calibration, but no succes, the problem remain. I filmed the videos where possible to see this problems. Video link https://www.youtube.com/watch?v=x4dPWJz ... e=youtu.be
Is it possible to fix problem locally, or I should solve this problem with AliExprss seller?
PS. I sent for you e-mail to support@... e-mail on week ago, but I have not get answer>
Best regards, Jaanis
I bought new oscilloscope DSO112A in Electronic DIY Club (Aliexpress) store one month ago. It have problem with vertical position calibration (it problem was from first time). When input terminal is set to DC or AC, without input signal oscilloscope shown input voltage ~0,4 V (it depend of sensitivity selections). I tried Default and VPos calibration, but no succes, the problem remain. I filmed the videos where possible to see this problems. Video link https://www.youtube.com/watch?v=x4dPWJz ... e=youtu.be
Is it possible to fix problem locally, or I should solve this problem with AliExprss seller?
PS. I sent for you e-mail to support@... e-mail on week ago, but I have not get answer>
Best regards, Jaanis