Products > Test Equipment
Rigol DS1000Z series buglist continued (latest: 00.04.04.04.03, 2019-05-30)
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bitseeker:
Yeah, ease of implementation.
Karel:

--- Quote from: Fungus on October 21, 2017, 06:29:52 pm ---
--- Quote from: bitseeker on October 21, 2017, 05:42:35 pm ---Karel, this is interesting. I normally use the built-in screen and so never noticed the discrepancy. I wonder what they gained or saved by truncating the screen rather than scaling it to fit. Just a case of ease of implementation?

--- End quote ---

Probably because "200" maps to a 400 pixel display very easily in hardware but "256" doesn't.

--- End quote ---

Then why didn't they do it with the 4000 series which uses the same resolution?
bitseeker:
Good question. I dunno.

- Product differentiation? Pay more, get more/better.
- Processing limitation?
- Not sharing code between models?
- Implemented by different team?
- Something else? :-//

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.
Fungus:

--- Quote from: Karel on October 21, 2017, 07:51:32 pm ---Then why didn't they do it with the 4000 series which uses the same resolution?

--- End quote ---

Bigger FPGA, more free gates?

Who knows...?

technogeeky:

--- Quote from: bitseeker on October 21, 2017, 05:42:35 pm ---Karel, this is interesting. I normally use the built-in screen and so never noticed the discrepancy. I wonder what they gained or saved by truncating the screen rather than scaling it to fit. Just a case of ease of implementation?

--- End quote ---

There is a kind of hidden feature in this somewhat-bug. One of the annoying limitations of the 1054z is that you can't hide a waveform that you are using as a source of data like you can on other scopes. For instance, if you are doing some MATH function (say, FFT) on a trace you can't turn it off to hide it, and just see the result.

But this way, as long as your trace is small, you can hide it just off screen!

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