Noise Floor "Flat"?

[signal1]

Is the noise floor amplitude flat or random? 

In my opinion, the noise floor of an acquired signal will be a random "hash" type of result.  Small flunctuations can and will exist. 

However, it's being suggested that under steady state conditions the noise floor will settle into straight line conditions with essentially no variation even under high magnification in the milli or microvolt amplitude ranges. 

How can I prove the noise floor will be varied and random rather than straight line? 

Thank you!

[CJ_Butler__DASYLab_Pro]

 I'm not sure I understand your question.

Which DASYLab module are you referring to?

[signal1]

Data acquired in DASYLab and directly viewed and stored. 

No module applied so question applies to basic DASYLab data. 

[CJ_Butler__DASYLab_Pro]

So, it's the A/D Analog Input module that you're referring to?

DASYLab is acquiring and displaying and processing data as it is delivered by the driver. Unless you are using an Average module, any noise is as the A/D card converts the data.