This is what I was saying earlier. Speakers are inherently non-linear devices. A speaker rated at 2ohms can go as high as 20 ohms depending on the frequency. Plus stability at one frequency does not inherently guarantee stability at all. To ensure that you need to do a sweep and look for clipping at all relevant frequencies.
Here are three versions of the schematic
pdf : http://jmp.sh/KDVL21k
bmp zipped : http://jmp.sh/gQ9MADv
No problem for me if you use and modify this files. This is an Hantek's design.
Mark_O,
I hope you don't mind if I add your last observations to the User Manual.
Thanks!
No need for "Sorry".
Personally I am grateful for updates as and when you find any spare time to release such. We all have lives outside this forum and I understand that this is JUST a hobby project.
You have already put Hantek's original coders and ongoing software support team to shame !
No need for "Sorry".
Personally I am grateful for updates as and when you find any spare time to release such. We all have lives outside this forum and I understand that this is JUST a hobby project.
You have already put Hantek's original coders and ongoing software support team to shame !
No kidding! I'd be surprised if, over the years this product has been available, there has been more than 1 or 2 updates a year. And those coming with little or no clue as to what had changed.
This is a really nice set of improvements. Thanks.
Off the subject a bit: One thing I'm not clear on, since I've never had to deal with it as a programmer, is how the screen draws vary between OS's, and 32/64-bit systems. You've commented several times about AlphaBlend variations, and I don't really have a good picture of what's going on there? I wouldn't expect you to write a book on it (that's probably already been done!), but a few line summary/overview might be helpful.
Hey Richard, remember this?
http://www.hantek.org/asken/iaskdetail.aspx?id=2014022803412937
AlphaBlend() is a windows GDI function that uses graphics hardware to do alpha channel blending (Transparencies and such), and a while back when XP first came out (And GDI AlphaBlend also came out) it wasn't too uncommon to come across hardware that didn't support Hardware Alpha Blending, but pretty much every graphics processing unit made today supports it, so you might think it would be odd for modern day systems to have issues with it, but alas they do.
It's not the hardware, it's Microsoft's AlphaBlend GDI function and it has all sorts of issues with 64 bit versions of Windows and other systems (32 or 64bit) that have non standard display configurations (Like dual displays)... Apparently Microsoft has been aware of these issues since Windows 7, and has officially stated that there is a bug, but have not fixed the issue or even addressed when a possible fix may be issued.
I wasn't aware of all the fiasco's involved when I started using it for brightness effects (and eventually Phosphor mode)... You learn something new everyday I guess...
Hey Richard, remember this?
http://www.hantek.org/asken/iaskdetail.aspx?id=2014022803412937
Yeah... what about it? ... I see no replies *shocker*
8. Added an alternative rendering option in case AlphaBlend() fails, some 32 bit
systems don't work well with AlphaBlend() apparently, especially in systems
with multiple display configurations.