Products > Test Equipment
Oscilloscope Bode Plot Speed Comparison
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mawyatt:
Not to confound this thread, which is about DSO Bode Plot relative speed with a given DUT,  but to update our issues with the Analog Discovery 2 we mentioned earlier. The site for the operational software for the AD 2 was fixed, and we were able to download such.

We were able to get the AD 2 to perform with the mentioned 10.5KHz Peltz Oscillator under Injection Locking conditions. To get meaningful displays required narrow bandwidth, multiple waveform cycles and averaging, all settable parameters like the PicoScope FRA utilizes, and also slow as expected. Once these parameters were honed in the AD 2 performed admirably, actually better than expected :-+

Keep in mind we are asking these measurements to be performed on a difficult DUT. Where the large "noise" or "interference" is considered, as this "noise" will get very close to the measurement frequency, then actually becomes the measurement frequency under locked conditions, then releases after lock is lost and the measurement frequency moves away when sweeping upwards.

Would be nice if the knowledgable folks at Siglent (and others) would offer some user selectable parameters which have a direct influence on the measurements at hand, such as those offered with the PicoScope FRA and the Analog Discovery 2  ::)

Best,
teddychn:
Here is the comparison of 61-points Bode test between AD2, SDS2074X Plus and SDS2104X HD. The generator signal amplitude was fixed at 500mV.

AD2 : 17.6 Sec
SDS2074X Plus :  ~ 177 Sec
SDS2104X HD :   ~ 177 Sec
tautech:

--- Quote from: teddychn on July 03, 2023, 09:11:15 am ---Here is the comparison of Bode test between AD2, SDS2074X Plus and SDS2104X HD. The generator signal amplitude was 500mV.

AD2 : 17.6 Sec
SDS2074X Plus :  ~ 177 Sec
SDS2104X HD :   ~ 177 Sec

--- End quote ---
Use of the blue Print/Save button for screenshots on the front panel preserves the menu in use showing your settings.  ;)
techneut:
And here is the SDS5034X:
1 9.05,29
2 11.03.93
3 Timing error, will do it again
teddychn:
Sorry, I haven't noticed the testing criteria and posted my previous test data for the SMPS loop gain test.

Here is the test result of AD2 with a very similar configuration:

Bandbass : 21.5 Sec
Bypass :    21.1 Sec
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