The Multi Channel oscilloscope software has a modular structure, with Sources, I/Os and Sinks.
Sources are modules that only generate data. The channels of instruments that are connected to the computer can be used as source, they generate the data that is measured by the hardware. The other source that is available is the software generator, which can create various signals from software that can be used in combination with measured signals.
Sinks are modules that only accept data. Typical sinks are e.g. graphs and meters, they accept data and display it. Other sinks are the disk writer, to store data to disk and the sound sink, to make data audible through the sound system of the computer.
I/Os are modules that accept data (Input), process this data in a specific way and then generate the processed data (Output). Data that is generated by an I/O can be used as input for a Sink or for another I/O. Multiple different I/Os can be chained to each other to perform a complex operation on the data. The Multi Channel oscilloscope software has many different I/Os to process data in a specific way. There are I/Os in several categories:
These I/Os perform a basic mathematical operation on one or more signals:
|Gain / Offset||Apply gain and/or offset to a signal|
|Add / Subtract||Add or subtract up to 32 signals|
|Multiply / Divide||Multiply or divide up to 32 signals|
|SQRT||Calculate the square root of a signal|
|ABS||Determine the absolute value of a signal|
|Differentiate||Differentiate a signal|
|Integrate||Integrate a signal|
|Log||Calculate the logarithm of a signal|
These I/Os perform a filtering operation on a signal or consecutive signals:
These I/Os perform an adjusting operation on a signal or consecutive signals:
|Deskew||Shift the input signal horizontally, in time|
|Slice||Ouputs a selectable slice of its input signal.|
|Limiter||Clip the input signal between a minimum and maximum limit|
|Comparator||Compare the input signal with a selectable reference level|
|Resampler||Changes record length and sampling frequency of an input|
|Window||Applies a window function to its input signal|
These I/Os perform an other operation on a signal or consecutive signals:
These I/Os analyze the input data and extract specific information from it.
|Duty cycle||Determines duty cycle percentage|
|RMS||Determines RMS values of the input signals|
|PhaseDifference||Determines phase difference between two input signals|
|FFT||Perform a Fast Fourier Transform (Spectrum analyzer)|
|EMI||Creates an environment that can be used for EMI pre-compliance testing.|
These I/Os perform automotive specific operations on the data.
These I/Os decode serial communication data from the input data and present the decoded messages.
|Pulse decoder||Decodes the A and B signal from a quadrature encoder to position|
|I2C decoder||Decodes analog data on an I2C bus to I2C data.|
|UART / Serial Decoder||Decodes analog data on a serial bus (UART, RS232, RS458, Midi, DMX, LIN) to serial data.|
|CAN decoder||Decodes data on a CAN bus|
|J1939 decoder||Extracts SAE J1939 SPN values from CAN messages|
|SPI decoder||Decodes data on a SPI bus|
Using sources, sinks and I/Os
All measurement setups in the Multi Channel oscilloscope software are built from one or more sources, I/Os and sinks. These are simply connected to each other by dragging and dropping. Multiple I/Os can be used to form complex mathematical operations.
In the image above, three I/Os are used to determine the area that is enclosed by two signals in XY mode.