PCSU200 "Digital Level Grabber"

Instruments PC Oscilloscopes and Recorders
1

Hello,

I’ve recently bought a PCSU200, and in the PCLab200 I see the following tab -next to the “Circuit Analyzer” tab-
“10110010”

Does anybody know what this is?
The quick tip says:“Digital Level grabber for code import”
OK, but what is this, how it should be used?

First I thought this some kind of serial data analyser for ex:UART, SPI…etc.,
but I am starting to get uncertain about it…

Thanks for the help!

2

This function is a sort of “Logic Analyzer”. It converts the oscilloscope waveform data to bi-level data, ‘1’ and ‘0’.
Here is a snippet from the Help’s “Controls” section of the PCSU200:
[color=#008000]10110010
Use this function to convert the CH1and CH2 waveform to a two-level digital signal (0 and 1 levels only). Conversion is made with respect to threshold level for CH1 in the middle of the upper section of the screen and for CH2 in the middle of the lower section of the screen. In oscilloscope mode use the vertical position sliders to adjust CH1 signal to the middle of the upper half of the screen and CH2 to middle of the lower section of the screen.
Long sequences of digital data can be captured to the acquisition RAM of the scope. On each sample the input signal level is detected. If it is over the pre-defined threshold then “1” is stored to the RAM. If the signal is below the threshold then “0” is stored. This way each sample takes only one bit of the memory capacity. This way the number of samples stored to the memory is 32768 samples per channel (in oscilloscope mode it is 4096 samples). [/color]

Here you’ll find some more information about this function and some screenshots: viewtopic.php?f=10&t=1788

3

Wow !!
That’s what I call support and customer care!
Thank’s for the amazingly quick reply and help.

Now I understand how it works…

Just one question regarding this:
How can I access/export the digital values (0 and 1) stored in the data aquisition RAM?

I have tried the “File\Save DSO Data…” to export into .txt, but it seems, not the “Digital Level (0 and 1)”
is exported, but values ranging from 0 to 255 (wich I thing the raw values from A/D converter),
and number of saved samples are 4095.

Do I need to use access through the DLL?

Thanks in advance!

Regards:
balintv

4

The data is stored to the file on bit basis i.e every bit of the saved data “bytes” represent one sample (either ‘0’ or ‘1’) on the screen.
Please see this thread how to “extract” the data from the saved file:
viewtopic.php?f=10&t=3647