Why did my Waveform Data / Trace Disappear on the ScopeCorder DL850/DL850V When I Re-load the WDF Data File?

If you discover that your waveform data/trace or some channels have disappeared from the ScopeCorder DL850/DL850V or Xviewer when you re-load the WDF data file, this is normal behaviour due to an incomplete acquisition.
For example, if the T/Div is set to 1 sec/div, do not take 5 divisions (five seconds worth of data); you must takes 10 seconds worth of data (1 sec/div * 10 div = 10 seconds) and then save the data to a WDF file.
Please adjust the T/Div to a more appropriate setting or continue taking data until the screen is a full acquisition on the horizontal axis. Do not take partial acquistions.

Related Products & Solutions

Data Acquisition (DAQ)

Yokogawa data acquisition systems give you the most flexibility and power to measure, display, store, and even actuate any number of physical or electrical phenomena.

High Speed Data Acquisition

  • Yokogawa high-speed data acquisition systems
  • Industry-leading isolation, bit resolution, sampling rate, and memory depth
  • Independent channel hardware and easy to use software


  • Digital oscilloscopes
  • High-speed sampling
  • Range of bandwidths for electronic device design and development
  • Advantages of oscilloscope and multi-channel data recorder

Oscilloscopes Application Software

  • Yokogawa's oscilloscope application software
  • View, export, analyze, and manage data 


  • Flexible, high-performance Yokogawa ScopeCorder
  • Modular platform combines mixed signal oscilloscope and portable data acquisition recorder 
  • Captures high-speed transients and low-speed trends