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Oscilloscope Bode Plot Speed Comparison
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2N3055:
Had a bit of time.

Keysight MSOX3104T.

200Hz - 10MHz
101 points per decade (boils down to 478 points).
ONLY ONE (1)  channel analysis (Siglent can have 3 simultaneously).
4 minutes, 34 seconds

So in order to measure 3 band active X-over 13 minutes, 30 seconds roughly with probes reconnecting overhead between 3 runs...
It shows how everything is relative, depending what you do...

Some comments: Keysight uses some different method. With Siglent's and Hexamer FRA approach measuring at lower frequencies takes more time at lower frequencies and gets faster as it goes to higher ones. With MSOX3104T, it is almost same speed all the time... As if almost like it uses standard phase/amplitude measurements on just few periods...


nctnico:
More likely the algorithm is more optimised. You can pre-filter / mix a signal to decimate it to a dataset with a fixed length and thus make the time needed for analysis constant.
Martin72:

--- Quote ---All this test gear but no stopwatch or enough disk space for a screenshot?
--- End quote ---

You say that...
2N3055:

--- Quote from: nctnico on June 24, 2023, 05:32:05 pm ---More likely the algorithm is more optimised. You can pre-filter / mix a signal to decimate it to a dataset with a fixed length and thus make the time needed for analysis constant.

--- End quote ---

Yeah I get what you're saying, but it shows time domain data, and it is always a screen with exactly 4 periods shown. At every frequency..
Could be just display..
Martin72:
Hi,

Today the tests with 2504X-HD and 1104X-E.
Same settings as before because we want to compare apples with apples.
To my surprise the bodeplot on the 1104X-E allows three outputs just like the 2000 series.
So I test the 2014X-plus, 2504X-HD and 1104X-E.
And the "winner" is...The little 1104X-E.  ;)
Nearly the half of time for all situations and :
Bode stopping and Bode ending is executed immediately, unlike the large models.
Here the times, later a little table:
SDS2504X-HD:
1. 6min54sec
2. 8min33sec
3. 10min11sec
SDS1104X-E:
1. 3min39sec
2. 4min43sec.
3. 5min47sec

Would like to see other results, ideally with the demoboard or similar filter*
And with R&S RTB, SDS5000X, SDS6000A or similar model..

Martin

*) will examine the board, then present the circuit (it´s passive)
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