Products > Test Equipment
Rigol DS1000Z series buglist continued (latest: 00.04.04.04.03, 2019-05-30)
<< < (42/74) > >>
TD-Linux:

--- Quote from: bitseeker on October 21, 2017, 09:40:00 pm ---I wouldn't think it's to avoid quantization error from fitting 256 values across 400 pixels. Scopes aren't so accurate for that to matter so much anyway.

--- End quote ---

Yeah, normally this would be nonissue - you increase precision when downsampling memory for display, or averaging for persistence, and can utilize it when drawing lines on the display and often you have at least 1 lsb of noise anyway. One possible reason is that they may be really trying to cheap out on the math - nearest downsampling, or quantizing the output of their filters back to 8 bits before processing for display. You'd think in this day and age that sparing a few extra bits in your adders and multipliers would be cheaper than throwing away 10% of your expensive ADC's dynamic range... alas, after seeing that pitiful FFT, maybe there's a stock shortage of multipliers at Rigol.
bitseeker:
My vote is that it's simply a consequence of minimizing cost (i.e., by design).

I'm just glad to know that there's more data above and below the display that I can access. Thanks for the revelation, Karel.
frozenfrogz:
I am going to keep it in the bug list and sort the issues later. I think it belongs into the "oddities" category, meaning »things you need to know about your scope« such as that the math / decode / ... functions use the screen data instead of the recorded memory.
bd139:
I think that’s my biggest annoyance. In the math functions it defaults to using the display as a source. So if I want any resolution in the math functions, I have to change the memory depth and frig the math source every bloody time and then set it back to auto when I’m done.
RoGeorge:

--- Quote from: frozenfrogz on October 28, 2017, 07:57:57 am ---I am going to keep it in the bug list and sort the issues later.

--- End quote ---

I wouldn't mix the 'bugs list' with the 'wish list', because this will make the rest of the real bugs to look less credible. 8 divisions on the vertical screen is not a bug.

Even more, do I want a grid of rectangles instead of squares, or fuzzy reticles, or a slower display because of the required interpolation? Probably not.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod