Products > Test Equipment
Two Tone Test with Scope and SA
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mawyatt:
That's a nice result and display.

I'm sold, are discount coupons available for the SDS1104X-E & SDG1032X?

Thanks,

Best,
tautech:
Here's another shot from SDS2104X Plus diving deeper towards the noise floor in full screen FFT mode.

bicycleguy:
Since you seem to be comparing FFT implementations wouldn't it be better to ask for something that can be compared like:
What are the closest 2 tones that can be separated with 3dB of dip between peeks and what's the highest and lowest frequency they can be done at.
Unfortunately the limits are set by the weakest link in the tone generator or the scope.

With Siglent SDG2042x and Keysight DSOX2014A, both enhanced.

Example: 119.99MHz and 120MHz high freq. limited by SDG and resolution by DSO FFT


Example 10 Hz and 10.05 Hz  and low, resolution limited by taking too much time to scan  :=\
tautech:

--- Quote from: PeDre on August 02, 2020, 09:15:30 am ---A new attempt with the Rigol DS1104Z, this time it worked better with 1 MHz and 1.01 MHz tone.
But no comparison with tautech's SDS1104X-E.

--- End quote ---
Try a faster timebase as AFAIK Rigols FFT works better with lesser waveforms on the display.
tautech:

--- Quote from: PeDre on August 02, 2020, 09:25:45 am ---
--- Quote from: tautech on August 02, 2020, 09:19:15 am ---
--- Quote from: PeDre on August 02, 2020, 09:15:30 am ---A new attempt with the Rigol DS1104Z, this time it worked better with 1 MHz and 1.01 MHz tone.
But no comparison with tautech's SDS1104X-E.

--- End quote ---
Try a faster timebase as AFAIK Rigols FFT works better with lesser waveforms on the display.

--- End quote ---

At 5 ms/DIV there is only 125 kHz/DIV resolution for the FFT.
I tried it for half an hour, I can't do better.

--- End quote ---
:)
Yes similar problems exist with other entry level DSO's.
Lower frequencies allow for better results.  ;)

Have a try with 10 or 100KHz and see if that makes any difference.
You won't find the limits unless you go looking for them.  ;)
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