Instrument: Agilent DSO6104A 1 GHz, 4 GSa/s 4 ch scope (8 Mpt).
Problem:
I don't see the same data in a 1000 point CSV exported file that I see on the DSO screen.
On screen, I can see a transient of about 185 mv (duration about 200 - 400 ns with scope time base of 100us/dev). However, in the Excel plot made from the 1000 point CSV file data, this transient only shows an amplitude of about 40 mv. The problem seems to be that the CSV data do not include the same points as the screen data (i.e., I am getting data points on either side of the transient peak).
Question1: How can I get the CSV data file to include the same points as are displayed on the screen of the DSO6104A?
Question 2: Generally speaking, can anyone explain why the DSO screen display appears different than the graph of the CSV data?
Question 3: Can the DSO6000 series be configured to give the same trace when we plot the CSV data (in Excel) as we see on the DSO screen?
Attachment file print_06.png is screen capture showing the event. The CSV file only shows a 40 mv peak transient when graphed in Excel.
Thank you.
Problem:
I don't see the same data in a 1000 point CSV exported file that I see on the DSO screen.
On screen, I can see a transient of about 185 mv (duration about 200 - 400 ns with scope time base of 100us/dev). However, in the Excel plot made from the 1000 point CSV file data, this transient only shows an amplitude of about 40 mv. The problem seems to be that the CSV data do not include the same points as the screen data (i.e., I am getting data points on either side of the transient peak).
Question1: How can I get the CSV data file to include the same points as are displayed on the screen of the DSO6104A?
Question 2: Generally speaking, can anyone explain why the DSO screen display appears different than the graph of the CSV data?
Question 3: Can the DSO6000 series be configured to give the same trace when we plot the CSV data (in Excel) as we see on the DSO screen?
Attachment file print_06.png is screen capture showing the event. The CSV file only shows a 40 mv peak transient when graphed in Excel.
Thank you.
1. Select ASCII format
2. Single run the scope
(Only single run can use full memory for data captured. Normail run mode will use half memory to process data and another halft memory to capture new data in order to increase update speed)
3. Select the data points
4. Press "Quick print"
5. Wait for sometimes for data output ...
The trace in the picture looks like the intensity control is set at max, and what you see is a composite image of rather more than 1000 data points - each vertical column on the screen contains more than 1 pixel, each 'lit' pixel representing a value that has been seen at least once within that column's timeframe (1uS at 100uS/div). Reducing the intensity would indicate what proportion of the time a particular vertical pixel was at a particular value, but you would still see multiple pixels per column.
So which of these values for each of the 1000 pixel columns do you want the CSV file to contain? Min, max,avarage or various other statistical functions could probably all be plausible answers....
It may be obvious to the eye that you are interested in the peak value of the transient, but the scope doesn't necessarily know that....
When you export the CSV file, when the request number of points is less than the actual number of points, it just skips data point. Therefore, potentially skipping the "peak" that you see on the screen.