Products > Test Equipment
MSO5000 Bode Plot Capability: Is it Good Enough? [Many tips about a 1st scope]
Fungus:
--- Quote from: JeremyC on October 04, 2022, 03:11:33 pm ---
--- Quote from: Fungus on October 04, 2022, 01:52:40 pm ---FWIW: Here's a screenshot taken with my AD2 with nothing connected to the input. 5 or 10 mV is about as low as it usefully goes without 50 Ohm terminated stuff (yes, it has a real 50 Ohm termination).
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Fungus, the "Discovery BNC" board doesn't have 50 Ohm input termination. The JP4 and JP5 jumpers are for AWG output.
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Oh, my bad... That's the output!
Post corrected.
Fungus:
--- Quote from: balnazzar on October 04, 2022, 03:19:34 pm ---The problem is interfacing the soundcard with the probes (I'm trying to understand how to). I installed the software, but I should do something real with it.
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You don't need probes, just use audio jack to crocodile clips cable (or something like that). Set attenuation to 1x.
2N3055:
--- Quote from: Fungus on October 04, 2022, 02:18:19 pm ---
--- Quote from: 2N3055 on October 04, 2022, 02:04:41 pm ---
--- Quote from: balnazzar on October 04, 2022, 10:58:45 am ---So, if I stimulate the circuit with an external WG, the AD2 will bodeplot its response? Thanks.
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No, Bode plot and impedance analysis works by controlling generator and scope in synchronization. AD2 has internal AWG and uses that one...No support for external AWG.
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Weird. My copy of the manual says the generator can be external. You might know that if you owned an AD2...
PS: Can your oscilloscope do this?
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Thank you for contributing quality content!!
Is this external generator recent addition? I did look into documentation when I was contemplating buying one and don't remember that.. It was long ago though..
One drawback of external generator implemented this way is that you cannot control it in this tracking mode. That means that variable level stimulus is not available which is not strictly necessary but is very helpful with difficult loads.
Also it doesn't know exact frequency but has to measure it, but that is not important because it is good enough. Frequency to mHz is not important here.
Also I don't argue Waveforms can make some pretty graphs. I was asking if measurements are accurate. As I said, there were some reports that phase measurements above 1 Mhz were inaccurate.. So I asked if someone did performance verification... Maybe they advertise only limited frequency on impedance plots because of limited accuracy..
I find responses from Frex and Eggonotto very useful here... You also gave some good info. :-+
egonotto:
Hello,
I did the last measurement with the AD2 again with the RTA4000. But the burden is different. C = 41 pF and L = 0.7 uH therefore the load already has an influence.
Best regards
egonotto
Fungus:
--- Quote from: baldurn on October 04, 2022, 03:46:35 pm ---The MSO5074 appears to be €799 at eleshop.eu.
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That's without tax so add 20% or so.
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