Why the horizontal time axis of NI scope SFP does not change with time?

[yangshanglu]

Dear my friends;

I wanna use the NI Scope SFP to obtain the sound system. But when I trigger the signal, the horizontal time axis number does not change, only the amplitude of signal changes. Any suggestion is appreciated. And can you be kind to tell me how can I otbain the signal information change with time

best

[Nicholas_B]

Greetings Yang,

The NI-SCOPE Soft Front Panel uses a relative time axis to display the incoming signal.  The signal on the display moves, while the numbers on the axis do not.  The instantaneous input signal value is the one that is currently crossing the line at time = 0.  This way, you can see the signal "as it propagates", with the current incoming signal value centered at the time = 0 line.  You can use the horizontal axis scroll bar at the bottom of the display to see different parts (in time) of the incoming waveform.  To acheive the type of display you were referring to, you can acquire and plot your signal in LabVIEW on a Waveform Chart or Waveform Graph.

Regards,

Nicholas B, National Instruments