Getting Started with Error signals in JETDSP

Since SU 15223 (Jul 2009) Jetdsp handles a PPF signal and its measure error associated as one entity. This new feature allows users to specify, process and plot signals with their relative errors.

Each error is stored in a separate DTYPE in the same DDA as the data and can be associated with data, X or T dimension

Now it is possible to:

• assign measure errors to a PPF
  
• manipulate the measure errors
  
• plot signals and errors associated to them
  

Types of errors in a PPF signal

The error associated to each dimension (data, X or T) could be of three types:

• Type 1 – Symmetric. In this case the error associated is the delta that is added and substracted to the signal. (see figure. 1A)
• Type 2 – Asymmetric. In this case the errors are two independent signals that represent the absolute values of the errors themselves. (see figure 1B)
• Type 3 – Radial error. The X axis error is calculated from the error in radial coordinate. This type of error is available only for dda CX*. Note that the type 3 error is a type 1 error applied on the X dimension which has first been transformed from Radial to Cartesian coordinaltes