S
Simon
- Jan 1, 1970
- 0
I met a strange problem on my dspboard.
I connect one capacitor (103/400V) between GND pin and Earth pin in my
dsp board.
Sometimes, if I connect the Earth pin to the PE of the AC power. The
dspboard works well, for example, if I just use the ground of probe of
osco to touch the GND quichly, the dspboard will still works well. If I
just let Earth pin impending ( unconnected), the dspboard will not
works well if i use the ground of probe of osco to touch the GND
quichly.
But today, if I connect the Earth pin to the PE of the AC power. The
dspboard will not work well, for example, if I just use the ground of
probe of osco to touch the GND quichly, the dspboard will not work
well. If I just let Earth pin impending ( unconnected), the dspboard
will work well even I use the ground of probe of osco to touch the GND
quichly.
By the way, I USE TDS2012 osco. Somebody told me ever the ground of the
probe is connected to PE in the osco. I am not so sure with that.
So, could you tell me when to connect the Earth pin to PE of AC power?
I connect one capacitor (103/400V) between GND pin and Earth pin in my
dsp board.
Sometimes, if I connect the Earth pin to the PE of the AC power. The
dspboard works well, for example, if I just use the ground of probe of
osco to touch the GND quichly, the dspboard will still works well. If I
just let Earth pin impending ( unconnected), the dspboard will not
works well if i use the ground of probe of osco to touch the GND
quichly.
But today, if I connect the Earth pin to the PE of the AC power. The
dspboard will not work well, for example, if I just use the ground of
probe of osco to touch the GND quichly, the dspboard will not work
well. If I just let Earth pin impending ( unconnected), the dspboard
will work well even I use the ground of probe of osco to touch the GND
quichly.
By the way, I USE TDS2012 osco. Somebody told me ever the ground of the
probe is connected to PE in the osco. I am not so sure with that.
So, could you tell me when to connect the Earth pin to PE of AC power?