Help: Puyuan DS5102CA waveform measurement problem

bigbat

Help: Puyuan DS5102CA waveform measurement problem [Copy link]

I bought a Puyuan DS5102CA oscilloscope ten years ago. Suddenly, no matter what waveform I measure, as long as there is a signal, it is a 50HZ sine wave. However, the 1KHZ 1V signal that comes with the test instrument has no problem. I don't know what the problem is. Maybe it's broken. There is no problem measuring 1K signal. Does anyone know? Thank you, please advise.

wenyangzeng

The shielding line of the oscilloscope test pen is broken.

maychang

It is speculated that the shielding layer of the connecting wire behind the probe (a cable with a shielding layer on the outside) is broken.

bigbat

wenyangzeng posted on 2019-5-6 10:21 The shielding line of the oscilloscope test pen is broken.

Thank you, it is indeed! I changed a test pen and it is fine. Have you encountered this problem?

bigbat

It’s really hard to spot from the outside!

wenyangzeng

bigbat posted on 2019-5-6 10:30 Thank you, it is indeed! I changed a test pen and it was fine. Have you encountered this problem?

Yes