Digital Waveform Generator

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The SmartScope comes with 4 dedicated digital output channels, each capable of generating up to 100MS/s with sharp rise and fall times of 2ns.
This allows square waves of up to 50MHz to be generated.
You can use the default app to generate some general signals, or upload your own csv file to generate any repeating sequence of up to 2048 samples.

Output pin locations

The 4 output channels are located on the AUX port, at the back of the SmartScope.
DWGoutput.png

Output voltage levels

As output voltage levels, you can select between 2 standards:

  • 0V - 3V
  • 0V - 5V

These voltages are selectable for an entire waveform and for all 4 channels together, not per sample nor per channel. In order to select the voltage, go to Menu -> Generator -> Digital -> Voltage level

Generating pre-defined waves

You can generate the predefined digital waves exactly the same way as desribed in Arbitrary Waveform Generator (AWG). Just make sure you have checked the checkbox in the Digital menu entry, to enable the digital output.

Define arbitrary waveforms in Excel (.csv file upload)

Parameter Range Description
DataIsBytes 0 or 1 Indicates if the data should be interpreted as bytes (for the 4 digital outputs). If '0', it will be interpreted as voltages (for the analog output).
Samples 1-2048 The number of samples used. The AWG loops on these samples. (< 0.0.8.4 had a minimum of 128 samples)
SampleStretch 0-255 The number of cycles to repeat each sample. If 0, sample update rate is 100MHz. If n, sample update rate is 100/n MHz.
BeginData Field to indicate that from here on the sample voltage levels follow

Each row defines a sample as byte value, where the 4 LSB define the values of the 4 output pins.

CsvValue Output3 Output2 Output1 Output0
0 0 0 0 0
1 0 0 0 1
2 0 0 1 0
3 0 0 1 1
4 0 1 0 0
5 0 1 0 1
6 0 1 1 0
7 0 1 1 1
8 1 0 0 0
9 1 0 0 1
10 1 0 1 0
etc etc etc etc etc


Sample digital output CSV

Value;Field;Description
1;DataIsBytes;Set to 1 to interpret the data as bytes, otherwise interpreted as voltages
8;Samples;The number of samples to use (later samples are ignored)
244;SampleStretch;The number of times to repeat a sample
0;BeginData;Data begins here
1;;
2;;
4;;
8;;
4;;
2;;
1;;