Has anyone seen an issue where waterfalls cannot be generated? I took some measurements today (REW 4.11, JRE 1.6.0_13) and I cannot generate any waterfalls for them.
When I go to the waterfall tab, I see the measurement file I had opened right above the “overlay” with the check next to it. The file I had opened only had one sweep in there and it also has a check mark next to it but both of them are grayed out. It is also like this on the “Spectral Decay” tab.
All other tab have it to where I can check-uncheck what I need.
I will try again with the button. Right now it jsut shows the progress window but does not move. If I recall from the previous version, each sweep could be checked or unchecked before needing to click the generate waterfall button. Also, on the last version, it was pretty quick, click the GW button and the waterfall was there.
One other thing, not sure it matters but just in case. Next to the file which is labeled "July 19 14:26:01" it shows -180.db
You're one version back on Java. You might try and update that to the latest version. Just go to the Windows Control panel and open the Java console and update it.
You might also try to select the REW Settings pull-down and select Delete Settings and Shutdown. Then restart REW and try it. (you'll have to rebrowse to your cal files).
Something in those saved files must be messed up. I reinstalled REW and pulled up an old sweep and can get a waterfall, just not with anything made today.
I have tried it on two different computers, XP and 7, latest java and v5.22 and the status bar never advances and I never get any calculated Spectral Decay or Waterfall plots.
I also reinstalled the 4.10 version on both machines with no go.
Joe, I think I have seen weird behavior trying to create waterfall charts when some external noise during the measurement process, or some electrical noise in the signal, caused a glitch in the data. So you could try taking the measurements again, and see if you have the same problem.
You could also try using the Spectrum tab, setting the Mode to Spectrum instead of RTA, and take a real time measurement using pink noise to see if there are any obvious spikes at, say, harmonics of 60Hz. If you see these, some people with laptops have been able to fix these by taking measures on battery power instead of line power.
Joe, here's another suggestion. Besides my unlikely suggestion of 60Hz harmonics, REW can get very confused if there is something like a static pop during the measurement. Unusually it figures this out and tells you it was a bad measurement. But this could also show up if you look at the Impulse graph. Does it look as if there were multiple peaks, equally loud? Or a later peak louder than the first? I wish I could make more specific suggestions, but I think I deleted the one or two measures where the Waterfall did not show anything. In my case, when I tried a second measure everything worked fine, so I discarded the first.
Look in the log files to see if any errors have been recorded, the location is shown in the Help -> About window.
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