I will look at the PCSGU1000 data and see if I can buy it later, if the 250 has no chance to get noise generation.
Another question: Is it possible to rebuild the images if only the data has been stored?
[quote]I will look at the PCSGU1000 data and see if I can buy it later, if the 250 has no chance to get noise generation.[/quote]OK. The noise function is not possible to the PCSGU250 due to the hardware (FPGA) limitations.
[quote]Another question: Is it possible to rebuild the images if only the data has been stored?[/quote]Yes, this is possible.
When the data file is loaded, you can also do cursor measurements using the [color=#000080]View -> Markers[/color].
You can also change all the settings (Vertical Scale, Frequency Range etc.).
Using the option [color=#000080]Options -> Show Multiple Traces[/color] you can add new measuring results to the file.
" The noise function is not possible to the PCSGU250 due to the hardware (FPGA) limitations."
The spec sheet says that the function generator sample rate is 12.5 Mhz
velleman.eu/distributor/prod … ?id=377622
◦sample rate: 12.5MHz
How large is the RAM buffer associated with the D/A?
It would be nice if that information was in the spec sheet.
If RAM is large enough, surely you can just load a precomputed pesudo random noise sequence from the generator library. With appropriate computations, it can have any desired noise shape (flat, pink, etc.)
Is the waveform library file format documented somewhere (I am new here and haven’t hunted everywhere on the site yet).
Or the FPGA could compute a PRN sequence using standard max sequence length shift register configurations, and apply a simple low pass filter to get the noise bandwidth users desire. PM me if you would like some help with this.
R
[quote]How large is the RAM buffer associated with the D/A?
It would be nice if that information was in the spec sheet.[/quote]The PCSGU250 has 512 data points in the wave table.
[quote]If RAM is large enough, surely you can just load a precomputed pesudo random noise sequence from the generator library. With appropriate computations, it can have any desired noise shape (flat, pink, etc.)[/quote]Yes, it is possible to use a data file containing random values.
[quote]Is the waveform library file format documented somewhere (I am new here and haven’t hunted everywhere on the site yet).[/quote]Yes it is.
Please select the Help menu option “Function Generator Help”.
There in the “Wave Editor” section is description how to create the waveform library files.
[quote]Or the FPGA could compute a PRN sequence using standard max sequence length shift register configurations, and apply a simple low pass filter to get the noise bandwidth users desire.[/quote]Thank you for this suggestion. - This kind of shift register method is used in the PCGU100 function generator to generate wide band noise signal. In the FPGA of the PCSGU250 all the “space” is now in use.