Raw Main Time (DVB-S2/S2X)

Raw Main Time is the raw data read from the input hardware or playback file. It is similar to Time data with the following exceptions:

This data has not had time corrections applied, so it displays a "CAL?" trace LED.
The data has not gone through the VSA's software resampling filters, so is generally not sampled at the specified sample rate.
The data has a wider bandwidth than the measurement span would indicate.

For the time traces (Time, Search Time, and Raw Main Time), 0 sec on the X-axis is the trigger location.

Raw Main Time data is useful in the following situations:

When Channel, IF Magnitude, or Magnitude trigger types are used, the input hardware detects the trigger, so Raw Main Time sometimes gives a better indication of what caused the trigger.
When a recording is played back, the Raw Main Time measurement data helps to see exactly the samples that are saved in the recording, with no filtering applied or settling removed.

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Marker Coupling

When marker coupling is used, markers on applicable Demod traces (e.g., Err Vect Time, IQ Meas Time, IQ Ref Time, Mag Error, Phase Error) will couple to the corresponding point on the Time, Search Time and Raw Main Time traces. For Demod traces, frame start (symbol 0) = 0 sec on the x-axis.