Recent content by Jimmy Venema

Sure the deviations for a capacitor even small ones are more to the higher end of the frequency range, because of the inevitabel inductance. So indeed the deviation at low frequencies is in the measurement of the impedance. The measurement rig has also coupling capacitors etc, so that would...

A 390nF capacitor is normally used a bit higher in frequency then 30 Hz ;-). In fact in my case it was only used in parallel with an another higher valued capacitor to get at a needed value that wasn't available in the normal E series. At the boundaries there will always be deviations. But I...

I've just tested with the 52 version and the capacitors are still off as in the 51 version, while they were ok in the 50 version.

Here a zip file of the mdat file with one inductor and a few capacitors. A 7z compressed file was not allowed to upload. Perhaps an idea to allow that, since the file size was 11 MB vs 19.5 MB. It is not that 7z is uncommon, in most places it replaced zip years ago.

I like the new component model option. But in version 50 the capacitors model seemed ok, but the serie resistance of inductor was way too high. With version 51 the inductance seems oke, but now the capacitors seems way off, no resistance en the fit is not ok.

Sorry my bad! I'm used to non CG, then the memory is a flatliner if you do not use an application. I guess here the message pump gets moving the memory pointer forward. Eventy time a new object is put in the message pump. In my C++ case experience after the message is ready, it is deleted and...

I see 341/636MB in the bottom left corner, but the strange thing is, the first number is growing it started at about 300 and grow to 350, then it went back to 300/513MB. Why does it grow while the program isn't used? now it is at 310/624.

I often also have a windows session running via parallels, because other software I use like VituixCad, Rehase and SigmaStudio are windows only. It is not that I actively use those windows applications while using REW, but it is always possible that just the fact that windows is running in...

MacOS, but it kicks in after say 20 measurements or so. Thus that's why I suspect the garbage collector as the culprit. If it is the the GC, then the sample rate is not really of importance. Then the question is if the GC does something during the sweep of say 20 seconds. The way it works is...

I normally throw those measurements away immediately. But I can describe how it looks like then. The real time display in the measurement dialog (bottom left) then shows sharp dropouts. Thus the green/yellow/(red) stuff is then gone for about 3 mm on my display (goes down sharp en then sharp...

As usual there is no free lunch! Glad to hear it is on the todo list. I further notice that sometimes a measurement goes totally bogus. Then you just throw the last measurement away, redo it and then it is normally ok. Is it possible that during a measurement the garbage collector kicks in and...

I build speakers as a hobby and use REW as measurement tool and I'm very happy with it, but still have an improvement request. A common practice to verify if there are no naste resonances from your cabinet is to have a look at a Burst Decay graph. It looks very similar to the waterfall graph...

Thanks, found it! I didn't scroll enough down on the list :coocoo:. This interesting I'm busy to import FIR filters from Rephase as impuls impuls to have a look at the possible pre and post ringing. If a crossover is done with FIR filters and use the same type at both ends then the pre and post...

"Added a Parametric Sum trace arithmetic operation that allows..." Were can I find this new option? Can somebody elaborate a bit on it, so I can see what it is and if it is something that can be useful for me.

After a restart of my laptop, I did not have seen any issue with a missing file dialog. So some strange interaction of macOS with java I guess.