Low signal feedback resolution and unable to increase FL lilter range.

PROBLEM

 

Waveforms appear to have very low resolution even with a high sampling rate (Figure 1).

 

Figure 1 – Poor Waveform Resolution

 

ANSWER

 

One possible reason is the low pass filter in Station Manger Station Setup is too low.  For an unknown reason in rare cases, after a software upgrade, the FL filter frequency can get changed from the default value of 1024 Hz to 12.8 Hz when an old Station Configuration File is converted and allow over-filtering of the feedback signal.  The software will not allow you to increase the FL filter frequency beyond this because the range gets set to 0.001 to 12.800 and does not allow you to change it (Figure 1).

 

Figure 1 – FL Filter Range and Frequency

 

Unfortunately, you must rebuild the Station Configuration again which sets the FL frequency and range back to the normal default parameters.

K
Keary is the author of this solution article.

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