11.8 Averaging
Bode Analyzer Suite offers averaging to reduce measurement noise.
Averaging can be activated by clicking on the Average measurement icon in the View ribbon.
When averaging is active, the icon turns green.
The average factor influences the averaging method. A higher average factor offers a higher noise
reduction but requires more sweeps to complete.
The following figure shows an example where a Gain measurement is averaged (Green icon) and 4
sweeps have already been completed. The average factor is set to 10. Six more sweeps should be
completed to achieve the full noise reduction in this case.
You can increase or decrease the average
factor during averaging without losing previous
measurements.
The following equation shows the implemented averaging algorithm:
The new averaged result is calculated using the new measured value and the previous averaged
result. N is the average factor that must be ≥2.
The influence of an old measurement will become lower and lower but will never completely
disappear (exponentially decaying moving average).
If your measurement result has changed, you can use Reset averaging to restart the
averaging and remove the influence of previous measurement results.
Averaging is performed sweep to sweep. This means that at least 2 sweeps are necessary to calculate
an averaged result.
Averaging is calculated using the complex measurement result.
Averaging needs to be activated for Gain and Impedance measurements separately!
Memory traces
Whenever you activate averaging, two memory buttons are available to copy data to the memory
traces.
Measurement → new memory will copy the measured result to
a new memory trace.
Average → new memory will copy the averaged result to a new
memory trace.
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