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User’s Manual
Rev 1.2.6 October 3
rd
, 2015
- 27 -
© Melchor Varela – EA4FRB 2011-2015
Setup – Filter
This setup offers the choice of one of two noise reduction filters or none for the Scalar Chart,
Smith Chart, Field and Multi-band modes.
The «Average» filter minimizes the noise but at the expense of reducing the measurement
speed. Four samples are taken for each measurement frequency and an average from these
samples is calculated.
The «Smoothing» filter is a moving average calculation for each measurement point of the
unweighted mean of the previous measurement points. The measurement speed is not affected
but there could be a loss of accuracy.
The magnitude of the peak or valley of a rapidly changing parameter may be
affected. Check the results with and without the filter if there is any doubt.
Setup – Sampling
This setup permits a choice of the number of measurement samples from three options:
«Normal / fast», «Double / slow» and «Normal / low resolution». The «Normal / fast» option is
the default setting and provides a good balance between accuracy and measurement speed.
The «Double / slow» option is intended for enhanced accuracy measurements, because it