public void periodicMaintenance(object obj, System.EventArgs args)
        {
            try
            {
                //Tracer.WriteLine("...maintenance ticker...");

                // oscilloscope.AddData(beam0, beam1, beam2);

                Tracer.AllSync();
                Application.DoEvents();
            }
            catch {}

            periodicMaintenanceTimer.Enabled = true;
        }