private void CompleteFrameBuilder(RawFrame frame, double timespan = 0)
{
    var n = frame.NumSpy - 1;

    // New builder if we get a preamble
    if (this.rawFrameBuilder[n] == null)
    {
        if (frame.DataType == DataType.TimestampPreamble)
        {
            this.rawFrameBuilder[n] = new RawFrameComplete(this.TimeStartSpy);
        }
        else return;
    }

    this.rawFrameBuilder[n].CompleteFrame(frame, timespan);

    if (frame.DataType != DataType.RssiMeans) return;

    // Write, send the RawFrameComplete and delete it
    this.dataSaver.WriteFileLog(this.rawFrameBuilder[n]);
    this.SendDataEvent(this, null, this.rawFrameBuilder[n]);
    this.rawFrameBuilder[n] = null;
}