In fact, on the Rigol, you can just run the Trigger Out back into channel two and use the frequency counter to see the waveform rate. (...)
Now that is DUMB..
Two BNC's in the front for what?
If they both perform the same what is the advantage, being able to swap to BNC 1 or BNC 2, now that is really dumb..
i don't think you can speed up data capture by reducing grading depth, DPO-core will simply add data and run next capture, display processor will count
depth value and calculate color/grading. This can only have influence on UI speed, especialy when doing measurements on the accumulated wave "depth" data.
Btw, 16 levels was 12 yrs ago a good value for state of the art DSOs:
http://www.hit.bme.hu/~papay/edu/DSOdisp/gradient.htm
I analyzed captured waveforms on the Rigol and found the following results:
The following are the brightness levels (HSB) of a single waveform (STOPped) depending on the persistence and intensity settings - shown as minimum to (50%) to maximum intensity scale:
a) Min persistence (closest setting to NO persistence on the Rigol): 44% - (64%) - 84%
b) Any persistence setting between 50ms - 20s: 4% - (14%) - 24%
c) Infinite persistence: 7% - (27%) - 47%
Now a bit off topic. It is hard for me to think that some persistence ( 50ms) is less light than No presistence, I guess I will have to accept (scaling, to show variations)
Also what is the meaning of Persistence in a single shot. After ghosts??
I know you might not like this, but sticking to some kind of script might also make future reviews more concise ...
I did think the menu system on this scope looked very 16 color-ish.
i don't think you can speed up data capture by reducing grading depth, DPO-core will simply add data and run next capture, display processor will count
depth value and calculate color/grading.
... the fact that GW-Instek is only using an 8-bit (256) color display (like last-generation inexpensive DSOs) instead of the more modern 16-bit (65,000) ones.
that display connector didn't looks like 8bit.
Honestly i don't know if there are any manufacturers using less than 16bit displays in their DSOs, Siglent even claims to have 32bit.
so no room for LAN/GPIB when VGA or SG or LA inside ... hmm
The slots are pretty easy from my perspective - LA and VGA/LAN. That's just me though!
Man, you are really clinging to your defense of this scope.
The slots are pretty easy from my perspective - LA and VGA/LAN. That's just me though!
Agreed.
that display connector didn't looks like 8bit.
Honestly i don't know if there are any manufacturers using less than 16bit displays in their DSOs, Siglent even claims to have 32bit.
Man, you are really clinging to your defense of this scope. Anyway, IMO, however you want to quantify it - their color handling (and grading) is sub-par compared to similar price range DSOs; at least in terms of 2 channel models - for 4 channels the trade-offs might be worth it.
Does it work? Yes. Does it look good? IMO, no. Even for color grading, using 64-bits reveals much more detail - and a better looking waveform display.
No doubt the colour grading display is useful in some circumstances,but in my opinion,a line rate video signal is not a good test of this facility,as for this waveform,colour doesn't provide any significant improvement compared to that from a conventional DSO display
FYI there is a review of the GDS-2000A scope in this months Silicon Chip mag.
I noticed a few errors, and no mention of the function gen module limitation, or lack of fine control. Wasn't really an in-depth review.
It still absolutely cracks me up how their function generator modules operate... what are they doing?
No doubt the colour grading display is useful in some circumstances,but in my opinion,a line rate video signal is not a good test of this facility,as for this waveform,colour doesn't provide any significant improvement compared to that from a conventional DSO display
I guess you haven't been following the discussion. This wasn't, in any way, a demonstration of when or where color grading is useful. The image was merely intended as an illustration of the extra detail visible with more levels of grading - and it was just an image I had handy to convert to 64 / 16 levels of color grading. Whether you, personally, think the extra detail visible with 2 more bits of grading is 'significant' - is another matter.
And,I guess you didn't really read my comment.
I reiterate,my comment was upon the choice of example.
And,I guess you didn't really read my comment.
Yes, I did.QuoteI reiterate,my comment was upon the choice of example.
Please feel free to spend your time creating and posting a better example - perhaps a more fruitful use of time.
At 25:46, you mentioned the waveform is jerky when the statistics function is ON…
Since you did not input signals, the GDS-2000A in under Auto Trigger mode. On the lower right hand corner Trigger counter showed more than several dozens of counts, which meant that GDS-2000A was triggered by DC noise signals.(Dave used 300MHz version which has a very sensetive trigger.) Hence, the updat rate and response was a little slow. Turn up Trigger Level or set Hi Frequency Rejection will solve the problem.
At 43:00, you compare the AM measurement with Rigol. GDS is far behind Rigol regard to the Intensity performance.
You set the acquisition memory into “short” mode, so the envelope of the AM signal is not solid, if you change to “Auto” mode, there will be no problem.