Recent content by nyt

Could always pay for FIR designer which does what you want.

It seems I can get the trace to come back if I select generator instead of input, then switch tabs and come back. Then I can set it to Input again, and it continues showing until switching tabs, but with no actual value listed in the legend.

Hi, Finally got around to using the new features. Couple of issues, though. It seems the stepped amplitude distortion graph only renders noise. THD is missing, THD+N and N are overlayed, even though the THD is still plotted in the RTA window. Also, would be nice if distortion overlay worked...

Looking good!

Any news?

Awesome, thanks!

REW's generator voltage display.

stepped sine does not let you input a level of 0dbfs when 0db is set to full scale sine. would also be cool if in the RTA screen the 0dbfs voltage would change to -3dbfs voltage if the option for 0db full scale sine is unchecked.

Hi, Is it possible to add more digits to voltage display? Generating a 0.0001V signal (-80dbFS on 1V output) truncates the display at 0.000V Thanks

Cool, was paining me seeing irrelevant figures most of the time on generated measurements :) If you list DR based on the stored peak value, that would be awesome, or even calculate SNR based on the fundamental level to the noise floor you have now that'd also be nice.

No DUT I've ever measured except a specifically calibrated interface has ever had the max output line up with -0.1dbfs, so the number displayed is virtually always wrong. You could use the peak captured level to calculate (ideal) or let the user enter the max value, otherwise having it display...

Any plans to work on this so it's a useful figure?

Understood, thought that's what you said earlier, but the last message didn't make sense. Generating a DR figure in this way is only meaningful if the max output of the DUT lines up with -0.1dbfs on REW's input. Chances of this happening are pretty slim. It would likely be better to calculate...

So if it's only using the value of the fundamental compared to the noise floor, then the DR figure seems wrong. The second image has an increased dynamic range, yet it is reported lower. The spectra from the second image converted to red and overlaid on the first clearly shows the increased...

Maybe still misunderstanding, does REW add 60db to the fundamental signal to calculate dr and just caps it at 0dbfs? Assuming the user has found the max level, then reduced output by 60db? Or does it use the peak sample value?