Scope math

Scope math is intended to extract time vector channels from the scope trigger shots. Math operations can hereafter be used on the time vector data - giving triggered analysis results, e.g. triggered FFT spectra. Tigger in scope math can be also use in CPB (Octave analysis setup). You can set scope math to output either the lastest shot or the time history of scope triggered shots.

TDA_Scope_Setup

For that we need to define the trigger Type which has the same meaning as on the scope instrument:

  • Normal - only output a scope shot when a real trigger occurs
  • Auto - if a trigger is not found, output current values
  • Free run - outputs scope pictures regardless of the trigger
  • Single shot - outputs only at first trigger
  • Unit - defines the x scale units either in milliseconds or samples.
  • Trigger channel - defines the channel for triggering the shots. We can output many different channels (defined on the left upper side, but the trigger channel can be only one for all).
  • Show history - defines if the outputs are ‘single value’ channels (only outputs the newest data) or if the entire history is put into async time history channels. ‘Show history’ should be used if you want derived math functions like FFT to be calculated based on the scope math trigger times.
  • Skip trig. in post time - defines if the triggers are searched also when post time is running. If yes, data could overlap.
  • Pre time and Post time - defines pre trigger and post trigger time.

Trigger settings are the same as in normal scope, alarms or storing triggers.