Autonerdz forums

Reieved the pico newsletter today so it looks like it is the official release now.

There is a couple of terms in the literature I was curious about.

What is  flexray?

What is the 'always on memory'?

Thanks Sam

Sam,

The 'always on memory' means that the scope is always utilizing the internal 32meg sample memory.  Of course, the samples are stored there in block mode operation.  But, even in streaming modes, this memory is used to process the data in real time.  This helps free up the PC CPU load.

It's amazing how well this thing works with the massive amount of data it is capable of collecting.

Comparing a 50 second four channel Pico 4423 capture with a 52.4 second Modis capture, the Pico 4423 will sample over 133 times faster.  It will collect 133x more data on just one of multiple screens.   

This means that instead of samples being 400us apart they are only 3us apart.

That's like comparing speed between a VW bug and an F16.   

Sam,

Yes, there are gaps between each full screen buffer as they are placed into the scrolling capture buffer.

The size of the gaps depend on the scope settings.  The 4000 has a rapid trigger mode where the gaps are very very small but that is only at the faster time bases. (1ms/div and faster)

The gaps, at other block mode time bases using the 4000, can be considerably less while capturing more data but...

When you get into the longer streaming modes with samples jacked up, the gaps get much longer.  This is due to the fact that the PC has to write a LOT of data to the hard drive before continuing.  In the example above, this may be around 40MB for one screen.  That takes several seconds.  However, when you have such a large seamless capture time on one screen with all the detail you would ever need, the pause between screens is less relevant.

Keeping in mind that the 4423 can collect 8x more data than a 3423 at the 5s/div example above.  So, it's not surprising that it might take 8x longer to write it to the hard drive with those settings.

So......It depends   

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Guess there was one of these at Vision so the above statement was not entirely correct.  I did check the Vision site and Pico site to see if there were any exhibitions before ours but none were listed.  Nothing in the Pico newsletter about that either.  I have been known to be mistaken before 

In any case, if you really want to see one as only Autonerdz can show you....ATE is the place to be. 

BTW Bryan,  I did put that 4423 performance chart together.  You can get it here:

http://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1236465435

Sorry...Picogroup members eyes only.

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I'll confirm the 4423 was displayed at Vision. The vendor was unknown before my arrival.

Are there any upgrade options for the 4423 ? I just bought my 3423 kit in december. I think I read on here that there wasn't any just want to clarify.

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