Gentec-EO PC-Gentec-EO (for MAESTRO and INTEGRA) - Manual (Page 30)

PC-Gentec- EO User’s Manual Revision 5.0 29
5.4 Averaging
5.4.1 Averaging Display
The averaging graph is the perfect tool to check laser stability over time. The averaging display is a bar
graph that presents the statistics of a set of measures as a function of time. The PC-Gentec-EO
measures a series of data during a user-defined period of time. Each bar represents the maximum,
average, and minimum values of the measured data. The top of the white bar represents the minimum
value while the top of the blue bar represents the maximum value. The yellow line represents the average
value for each set of bars. This allows you to quickly evaluate the trends of the average, maximum, and
minimum values in time.
Fig. 5-11 Averaging display
For Power Detectors:
In the Averaging display mode, the power measurement is the average value defined in the
averaging settings. For optimum averaging, when measuring the average power of a pulsing
laser, it is preferable to use a sample period that is a multiple of your laser repetition rate. For
instance, if you are running at 1 Hz, use an average period of 1, 2, 3 etc… seconds. If it is at 1.5
Hz, use 3, 6, 9 etc… seconds, as the sample period. Take note that if one data point is out of the
current scale, the resulting period average will be OUT. You should set the scale higher than
your maximum unfiltered measurement to avoid this situation.
For Energy Detectors and Power Detectors in Energy Mode:
In the Averaging display mode, the Energy measurement is the average value defined in the
averaging settings.