How to show dBA scale in RTA

[eepty]

I am using a USB microphone to do spectrum analysis. In the RTA graph, can I show the graph in dBA scale?

Thank you.

 

[John Mulcahy]

That doesn't really make sense for an RTA display. The graph will look the same for any weighting, since the RTA is showing the frequency content of the input. A weighting curve can be applied to that frequency content and the results added up to give an overall A weighted figure. The unweighted, C weighted and A weighted values for the rms input level are shown at the top right of the RTA graph, but you need the latest beta version to see those.