Playing a Recording

1. Create a recording or recall recorded data.

2. Play the recording:

   • Click the Restart button on the Control toolbar.

     OR

   • Click Control (from the main menu) > Restart.

3. Set up Playback Trigger, if necessary.

Time Corrections and Playing a Recording

Time-domain corrections are applied permanently to recordings as they are saved in any file format except SDF (Fast) format. This includes any calibration that was selected by the user at the time the signal was recorded. Correcting in this manner allows the user to save fully-corrected data for further processing using MATLAB or other mathematical software. When you recall and playback a recording, the current self-calibration and external corrections are not applied. The External Amplitude tab and External Frequency tab calibration parameters are disabled (greyed-out) during recording playback.

For recordings saved in SDF (Fast) format, the data is saved uncorrected, but correction data is saved with the time data. This correction is applied when the time data is played back. The User Correction tab sections are disabled (greyed-out) during recording playback.

For more information, see About User Correction.

I+jQ Measurements and Playing back a Recording

Signals that are recorded in I+jQ mode should be played back in I+jQ mode. While they can be played back as 2 or 4 (Dual I+jQ) separate channels, the time corrections will not in general be consistent. 2-channel or 4-channel Baseband recordings, however, can be played back in I+jQ or Dual I+jQ mode and time corrections will be accurate.

Segmented Recordings

For segmented recordings, the Player shows the start and stop times as if the segmented recording were one segment. The Player does not know about segment start times and boundaries. Therefore, the stop time is:

• SegmentXDelta * (Number of Points in Y data)

Using Overlap Processing On a Digitally Pulsed Signal

If playing back a pulsed, digitally modulated signal and using digital demodulation with pulse search to demodulate the signal, note that overlap processing uses the search length to determine the amount of overlap, not the result length. The search length determines how much data is collected whereas the result length determines how much data is demodulated and displayed.