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Topic: weighting on "B" chain tune ups?
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 05-28-2001 12:17 PM
Wait, wait...Weighting on the analyzer? While some find it convienent to have an inverse "x" weighting impressed onto the display..C weighting make no sense for an RTA display. In some rare circumstances, "A" weighting can be used while making noise measurments but often is not needed either. Now as to the SPL meter....they only make sense when they DO have a weighting (unless you are positive that the meter has more bandwidth than that which you are measuring. For theatres, "c" weighting on the SPL meter yields a meaningful number. Steve ------------------
"Old projectionists never die, they just changeover!"
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 05-28-2001 05:00 PM
As an experiment, try inserting and removing the filter...I'd be surprised if you see a difference on the RTA display though you might see a change in the SPL measurement. But Gord is correct, no weighting on RTA but "C" weighting on SPL... Are you SURE that there is a separate switch for the RTA display to have weighting and that it isn't just for the SPL display? Steve ------------------
"Old projectionists never die, they just changeover!"
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