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Capturing a digital stream

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Capturing a digital stream

Postby asteroid » Thu Mar 28, 2013 8:52 pm

Hi, i m newbie and i would like to record a digital stream 12Mhz data and clock to check if the data contained in the stream are ok. How To Do? I have a picoscope 6.

Thanks in advance for the support.

Aster.
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Re: Capturing a digital stream

Postby Martyn » Tue Apr 02, 2013 6:49 am

Which scope do you have, what type of digital data is it and do you wish to decode it or look to see if the signals are clean ?
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Re: Capturing a digital stream

Postby asteroid » Tue Apr 02, 2013 8:27 am

Hi, i have a picoscope 6000, the stream is an SPI sequence clock and data at 12 mhz.

I need to capture about 500 ms/div but when i zoom the data stream resolution is very bad and it's not possible to see the bit sequence. Is there a way to capture 5 sec ?
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Re: Capturing a digital stream

Postby Martyn » Tue Apr 02, 2013 12:32 pm

When running in streaming mode, where the trace scrolls across the screen, you will only see full detail momentarily when the trace completes and before the new one starts, or by stopping the capture and reviewing the buffers.

If you go to Tools->Preferences->Sampling and change the SlowSamplingTransition collection time to 1 s/div this will set your 500 ms/div collection, 5secs per screen, to block mode. In this mode it will capture a block of data before displaying it on the screen. If you zoom in on this trace you should always see the full detail.
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