exact, this seems to be your problem, and examples below confirms it:
IMAGINE ORM NOM NOM num num... NO EAT JITTER... NO EAT!!!!!!!!! NO! ONLY EAT GOOD APPLE... Signal is good! YUMMY!
...
HAHAHAHAH!
...
I need a small kitten to hop across my screen now with a fluffy pen to point at the right thing so you can see!!!
so really, you need to got to doctor and/or try to learn how to express oneself.
honestly i don't have issues with english.
The fact you can't understand or answer simple question makes me realize that the only problem here is you,
jumping from topic to topic, posting wired jokes (haha), using (without any reason) bold/italic/caps, etc.
is the best confirmation.
I thought we were having a fun discussion, now you think my jokes are WIRED?! Well ALRIGHT I need to go the doctor to learn how to express oneself! Thank you for the advice <333 I shall go to the doctor right away and not talk about ADCs any more!!!
Also right above us a kitten named mike1305 just posted with his fluffy pen.
THAT IS THE BEST CONFIRMATION.EDIT: i'm nice guy, so i will explain what is your (and not my) problem:
1.) The general quastion was - are these ADCs overclocked and if they are is it bad?
Most of your answer however are generic and have nothing to do with the question, this spefic ADC or what so ever topic related
In the end the design was rushed with the cheap MAX II
2.) pointless, any CPLD would do the job as well. I would not say "design was rushed", others with similar hardware combination
did they same (Instek/Rigol/Atten/Siglent/UN-T , and that since years, no rush here)
Look at the graph on FG 19. (Page 20) FG. 29 (Page 22)... You'll see that it's great at 500mhz,
pretty bad accuracy at 1GHZ (even 800mhz sucks), and horrible at 2GHZ... [/i]
3.) pointless, the same DSO with real ADC08D1000 would have still the same bandwidth.
In fact it even says for DES mode 900mhz is "typical" @ PG. 9
They say a "typical" for non-DES is 1.7ghz @ PG. 8
2GHZ @ +/- 7 DB loss... @ page FG 29. Page 22 of the A/D manual
So You can easily push this to 1GHZ with +/- 3 DB loss... WHILE in DES mode I am guessing?
4.) pointless and mix of things, you can't push anything was already given by the hardware, FPBW have nothing
to do with overclocking, etc.
This is also 8-bit sampler, it isn't a 14-16 bit precision one either... I can't imagine how terrible it would
be at 2GHZ. It's funny to imagine though...
5.) you don't need to imagine anything here as it is pointless for give topic/questions.
SnR/attenuation changes with the clock frequency, which people were asking what happens when you overclock it...
so far ok, but then ...
Obviously it overclocks to 1GHZ, it can even do 2GHZ ( with problems )...
7.) as answer to my comment to what you "saw" on SNR/Input frequency figure and not from SNR/Sample clock
(which as shown in below didn't exists for you).
I was making a joke about 14-bit precision non-sampling A/D converters
a joke, the only joke i see is you, but hey, let's continue.
But how many sample points do you think you'll have in X amount of time with each step before it's digitized?
How accurate is that going to be to your standards? Good enough for you?
But is it good enough for me? I prefer high bandwidth, high sample rate
8.) as comment/answer to given question complettly pointless
ENOB doesn't change when you overclock
...
The noise is going to be very high from overclocking
9.) You can easy convert ENOB to SINAD and calculate the SNR/THD values. So think back, when SNR is chaning while overclocking
the SINAD and ENOB will change as well. This is pure math (no, you don't need english to get that).
Therefore is your ENOB statement above wrong, but you even not recognized it as you posted about SNR, do you?
If you know how the A/D steps through in a delta-sigma converter, you will know that noise creates poor samples, but that's really just a filtering/attenuation issue... I had to post that even in the manual it says a 3db loss which isn't a big deal but ...
10.) the question was not about "a sigma-delta converter" but this specific flash converter, but anyway, what you said agin?
Ahh, i see
(1.) Most of my answers are about performance issues with overclocking... (2.) A CPLD is slow and small. You do not know the differences between them and FPGAs... A PLD has a speed grade. This is not debatable... (3.) This is a different device, you have not read either datasheet
(4.) The bandwidth is "where" the sample is taken. SnR, sample speed, all tie into it... If the bandwidth is bigger, you need to sample more to capture it correctly... A/D converters will step through each part of the waveform to capture it... (5.) There is a difference between a delta-sigma converter and a flash one,
please refer to my table I created for this thread (7.) In an A/D converter, the frequency will affect the entire device... Increasing clock frequency will make the A/D converter sample at more points, and more noise will appear... I wonder why I am even telling you this...
I have linked you the basics of an A/D converter. I can tell you cannot design with them yet... You also don't understand basic RC circuits and waveforms... I can tell you would also struggle with PLLs, as I mentioned the DDR output and it confused you...
(8.) This is most important question in choosing an ADC...
(9.) I was referring to the size of the buffer, which is 8-bits...
ENOB RATIO is a NOISE RATIO for digital systems...
SIGNAL-TO-NOISE-RATIO is a NOISE RATIO for analog systems... An digital waveform is
electrically still analog... They are both noise ratios... So we call it a NOISE RATIO...
ENOB in it's short term means PERFECT ENOB which is 7.5 or 8-bits. Perfect ENOB
doesn't change... the SnR changes... Both are NOISE RATIOS, so we can settle them as DIFFERENCES BETWEEN THE NOISE AND THE SIGNAL... Please study basic RF design guidelines...
(10.)
If you look at the chart, which I created myself, detailing A/D types.... You will see the delta-sigma is the HIGHEST PRECISION one. It has the most complicated decimator stage... In english we call this an "example"... I created this table so others can follow. FLASH is the opposite.
When you see two different examples in english which are opposite, you call them contrasting examples...
I am done educating you for today... I think I have settled every question you could possibly ask ( english questions too ) <333
Also do you like german music?!?!? I own a lot of german music... I see you are german... I like this particular song: