Rigol FFT is totally wrong. I have seen notes that Rigol 1kZ have 64k FFT instead of 2k. So 64k and 128k not very big difference.
Also this kind of tables are not very useful because it do not expain any thing any deeper than just name, number and v or x.
Rigol FFT is totally wrong. I have seen notes that Rigol 1kZ have 64k FFT instead of 2k. So 64k and 128k not very big difference.
Yep.
All data points are cherry picked, there's inaccuracies and missing competitors (where's the cheap Keysights/Insteks?)Also this kind of tables are not very useful because it do not expain any thing any deeper than just name, number and v or x.
Yep. They tell you nothing about the usability, the amount of useful information shown on screen, how that information is shown, how many button clicks and knob twists is takes to turn on a simple measurement, if they can zoom out after a data capture, etc., etc.
But still... par for the course in the marketing world.
Apparently one is on the way to me. Wioll be interesting to see how stripped down the design is compared to the existing model.
Comparison (from Siglent)
Comparison (from Siglent)edit: just checking it.... there are small lies... there are big lies.. (attached) if they based on that and just add 2Mpts to competite, they were highly deluded.. enough for me... there is no possible way to get 10MPts (bins) FFT out of this thing...
http://scopechart.com/rigol/rigol-ds1054z-ds1054z-1
A case in point was the original first SDS2000 with 35 Mpts memory that later with FW was enlarged to 70 Mpts yet no datasheet ever reflected this.
Or later release a new tweaked model of much the same instrument like SDS2000X, now with 140 Mpts memory.
So which datasheet do we compare from ?
....and what price?
So which datasheet do we compare from ?
The one that is current when you make the comparison. I get your point, but everybody with any current knowledge of budget scopes knows that the 1054Z comes with 24M for a while now. My honesty expectations for marketing types are pretty low, on the order of politicians, but this does seem to fall below even that standard.
In the end these comparison charts are utterly useless.
A case in point was the original first SDS2000 with 35 Mpts memory that later with FW was enlarged to 70 Mpts yet no datasheet ever reflected this.
Or later release a new tweaked model of much the same instrument like SDS2000X, now with 140 Mpts memory.i'm not sure if i understand.
In the end these comparison charts are utterly useless.
I remember certain Siglent fanboys endlessly posting a Siglent vs. Rigol chart here.
As far as I can see it was Dave who post these tables - due to unknown reason. Perhaps media business need.
Rigol manual and data sheet tell FFT 1200pts and FFT in "memory mode" (what ever this is) 16kpts.
But somewhere I have seen claim about 64kpts.
Where is documented or directly displayed it is 64kpts. Who can show it or where I can find this excatly, it is changed and when, after what Firmware version.
I like facts not rumors.
I also need to make a not here about discussions on FFT:
Many are confusing number of sample points and number of FFT bins.
You need 2048 points to have 1024 bins..
If you sample at 1 MS/s, divided by 2048 will give you 488 Hz frequency between bins, in 1024 bins from 0Hz to 500 kHz (1/2 sampling rate).
So if a scope claims 64 KPoints of FFT, it will as a result have 32 Kbins.
It will also have 15,26 Hz resolution per bin at same 1 MS/s sampling rate.
Or 1,526 kHz per bin at 100MS/s with 50 MHz bandwidth
or 15.26kHz at 1GS/s and 500 MHz bandwidth.
That is how you determine how much bins/points Rigol has, by figuring out best RBW at specific sampling rate/bandwidth.
Rigol manual and data sheet tell FFT 1200pts and FFT in "memory mode" (what ever this is) 16kpts.
But somewhere I have seen claim about 64kpts.
Where is documented or directly displayed it is 64kpts. Who can show it or where I can find this excatly, it is changed and when, after what Firmware version.
I like facts not rumors.ok here is confesion from 1kZ owner for not the first time... the built-in 1kZ's FFT is crap! whatever it is, 64K? 16K? 2K? let call it 200 points, bottom line its crap... happy now? ps: now dont ever confuse yourself with its memory size 12M or 24M? dont bother! dont ever ask Siglent to put it in their comparison chart ok?
what ever it is. I keep this as fact, until some data what overrides this information.
About Siglent we have lot of data and details what it is and what not... but about Rigol... nearly like "guess what is this - play".
Do peoples buy these just for decorating some hobby corner or just playing some fun.
About Siglent we have lot of data and details what it is and what not... but about Rigol... nearly like "guess what is this - play".
Do peoples buy these just for decorating some hobby corner or just playing some fun.
probably zero-padded to 16k?
This is SDS1104X-U
And in this thing, example Siglent, and many others do not leave anything what need guess.
128kpts. 131072points aka samples and 65536 bins. In this image sampling frequency is 50MHz and this give FFT range 0 - 25MHz. (as can see it is zoomed in lot from full scale)