The dual 128k buffer in your 212/50 allows you to collect up to 128,000 samples on one screen, per channel. Since each channel also has a 50MHz ADC, none of the resources are shared and it samples just as fast on one channel as it does on two. The actual sample rate varies by how much time you have on the screen and the max number of samples you have selected to be captured. You can use the Autonerdz Sample Rate Calculator to see how all this works:
With the max number of samples per channel set to 128,000, you can put a lot of time on each screen while maintaining robust sample rates. How fast a sample rate you need will depend on how fast the signal is that you are working with. As long as you have not pushed it too far, you will capture everything during that screen time.
By using the Save On Trigger function, each triggered screen can then be automatically saved to your hard drive. The default is 100 screens but you can make that more. The count starts over each time you stop and start the acquisition. This way you will save everything the scope sees and can review it later, zooming in on each capture as needed to see areas of interest.
The scope is not acquiring data while it is transferring data to the PC, therefore there will be gaps between the captures. How long these gaps will be depends on how much information you are moving. The more samples you collect the slower the screen updates because the larger amount of data takes longer to move. This is not as big of an issue as it seems. When you can put 20 seconds on one screen, the ratio of down time to run time is minimized and your odds are good to catch that intermittent.
I have produced several hours of Flash tutorial movies that cover this and many other PicoScope operation techniques and strategies in detail. These productions are available to all of the Autonerdz support group members. There is a one time fee for this service to join. This may serve your training needs. You can read more about this service here:
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