Products > Test Equipment
Two Tone Test with Scope and SA
<< < (4/33) > >>
tautech:

--- Quote from: mawyatt on July 31, 2020, 09:32:48 pm ---Don't think you need to use the FFT max hold feature.

--- End quote ---
You certainly don't if you don't mind looking at all the noise at noise floor levels.
I don't as I'm only interested in the fundamental and its associated peaks therefore I mostly use some form of peak/max hold.
All screenshots done thus far here are with max/peak hold.
mawyatt:

--- Quote from: jjoonathan on July 31, 2020, 08:59:16 pm ---Here's a SDG6022X into a RTO1024 oscilloscope and FSP spectrum analyzer.
(Attachment Link)
(Attachment Link)

--- End quote ---

This is superb performance, what you would expect from a 16 bit ADC based scope!! However it's well out of the price range of these other scopes, and I see it's been replaced with the RTO2000 starting at only $14,500!!

Best,
mawyatt:

--- Quote from: tautech on July 31, 2020, 08:02:12 pm ---
--- Quote from: mawyatt on July 31, 2020, 06:45:25 pm ---Could I impose on you to do a couple of these tests with the 10 bit ADC mode?

--- End quote ---
10 bit mode with 10 KHz and 10 MHz 2 tone tests. AWG output now 0 dB.
Envelopes are always fun to get solid triggering on so holdoff added as/if required and done previously.  ;)

Again, SDS2104X Plus and SDG2042X.





--- End quote ---

Thanks for running these tests again. Appears the 10 bit doesn't improve over the 8 bit performance which makes me wonder if the 10 bit is achieved with some sort of signal averaging rather than a true direct 10bit digitized result?

Best,
mawyatt:

--- Quote from: tautech on July 31, 2020, 09:40:14 pm ---
--- Quote from: mawyatt on July 31, 2020, 09:32:48 pm ---Don't think you need to use the FFT max hold feature.

--- End quote ---
You certainly don't if you don't mind looking at all the noise at noise floor levels.
I don't as I'm only interested in the fundamental and its associated peaks therefore I mostly use some form of peak/max hold.
All screenshots done thus far here are with max/peak hold.

--- End quote ---

I prefer to see the noise floor, as sometimes there might be some information buried within. Everyone has a preference!!

BTW the 10KHz Time Domain plot doesn't look like the envelope is extending down to zero, is this just an artifact of the display & time base or is the waveform envelope not getting to zero?

Best,
tautech:

--- Quote from: mawyatt on July 31, 2020, 09:45:33 pm ---Thanks for running these tests again. Appears the 10 bit doesn't improve over the 8 bit performance which makes me wonder if the 10 bit is achieved with some sort of signal averaging rather than a true direct 10bit digitized result?

--- End quote ---
10 bit explanation here:
https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/msg2783928/#msg2783928


--- Quote from: mawyatt on July 31, 2020, 09:50:19 pm ---I prefer to see the noise floor, as sometimes there might be some information buried within. Everyone has a preference!!
--- End quote ---
Each to their own.  :P  ;D


--- Quote ---BTW the 10KHz Time Domain plot doesn't look like the envelope is extending down to zero, is this just an artifact of the display & time base or is the waveform envelope not getting to zero?
--- End quote ---
Yeah I spotted that too so will investigate..........
Did it also happen in 8 bit mode ? Haven't looked yet.
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