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MSO5000 Bode Plot Capability: Is it Good Enough? [Many tips about a 1st scope]

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egonotto:
Hello,

the SDS1104X-E  has only a Display Resolution of 800×480.

But I think it is a great scope.

The Analog Discovery and Analog Discovery 2 are small laboratories much more than a scope. They are practical in combination with breadboards. I am biased and I like them, but in the meantime they have become very expensive. Maybe you'll get them academically.

I have an Analog Discovery an Analog Discovery 2 and a Digital Discovery. If 2N3055 or someone else wants to have something tested I try it if my place (20 cm * 40 cm) is enough.

Best regards
egonotto






balnazzar:

--- Quote from: 2N3055 on October 04, 2022, 09:03:34 am ---
Plenty people are recommending AD2 but there is no real performance verification anywhere to be found.


--- End quote ---

I'm investigating. For example: https://hackaday.com/2018/06/20/analog-discovery-2-as-a-vector-network-analyzer/

Is the Discover 2’s NA mode useful? Yes. Is it perfect? No. The interconnect issue gets more and more problematic the higher you go in frequency. If you already have one of these, by all means, use the NA, especially for lower frequency work. But if you really need an NA, this probably isn’t going to be your first choice.

Also, from: https://www.allaboutcircuits.com/technical-articles/tool-review-analog-discovery-2-by-digilent/

The AD2 also includes a spectrum analyzer and a network analyzer with Bode plot capabilities. Each of these tools can be used for analysis up to 10MHz and are available for each oscilloscope channel input.

Only 10 MHz. I previously thought it got up to 30...

Also, reviewing the AD2's scope in general, from: https://www.allaboutcircuits.com/news/analog-discovery-2-vs-other-pc-based-oscilloscopes-is-ad2-worth-the-hype/

Hence, while the ADC might support a high sampling rate, we might lose some details of the input signal simply because of the lack of memory.

It just has 16K memory depth.

From various Reddit posts (AskElectronics):

1. I used an AD2 last quarter in my microprocessor system design class as an oscilloscope, logic analyzer, and frequency generator. It can do other things but I mainly used those.
It worked well but I much rather prefer a regular oscilloscope as it can be difficult to analyze fast signals. But it's a great bang for your buck. Think of it as a swiss army knife. A ton of neat tools in a small package, but all the tools are meh. Usable but meh at best.\

2. I love my AD2. It’s a Swiss Army knife of tools and fits in my backpack. I’ve used it to gather data for the last couple papers I published. It’s scope and logic analyzer has some features that do not come on your basic scopes (at least not without several upgrade tiers). It definitely has limitations with resolution, but will be fine for most non performance critical things. It is also scriptable with its own language or through a python or matlab friendly api.

A video review (may be useful for future reader of this thread):
The software seems to be indeed very good, far better than the software that comes with bench scopes, even top brand (although I just seen Siglent's and Keysight's at the university).

The NA is reviewed starting from here: https://youtu.be/0nFFJT1oV34?t=287, but it doesn't say much, apart from platitudes.





balnazzar:

--- Quote from: egonotto on October 04, 2022, 09:37:36 am ---
I have an Analog Discovery an Analog Discovery 2 and a Digital Discovery. If 2N3055 or someone else wants to have something tested I try it if my place (20 cm * 40 cm) is enough.


--- End quote ---

Thanks, man.  :)

Could you please check the limits of the Network Analyzer? Does it really gets to 10 MHz and not more (or less)?

Also, can you confirm that the software is complete, functional, and overall better than the sw that comes generally with bench scopes?

2N3055:

--- Quote from: egonotto on October 04, 2022, 09:37:36 am ---Hello,

the SDS1104X-E  has only a Display Resolution of 800×480.

But I think it is a great scope.

The Analog Discovery and Analog Discovery 2 are small laboratories much more than a scope. They are practical in combination with breadboards. I am biased and I like them, but in the meantime they have become very expensive. Maybe you'll get them academically.

I have an Analog Discovery an Analog Discovery 2 and a Digital Discovery. If 2N3055 or someone else wants to have something tested I try it if my place (20 cm * 40 cm) is enough.

Best regards
egonotto

--- End quote ---
Thank you, you are very kind.
In the light of these discussions, I would like to know how well it would fare doing classic stability analysys, on a simple opamp circuit or a simple PSU.  Siglent has A.N. : https://www.siglenteu.com/application-note/power-supply-loop-response-bodeii/ where simple PSU is measured. Something like that.
Regards,
Sinisa

2N3055:

--- Quote from: balnazzar on October 04, 2022, 10:21:30 am ---
--- Quote from: egonotto on October 04, 2022, 09:37:36 am ---
I have an Analog Discovery an Analog Discovery 2 and a Digital Discovery. If 2N3055 or someone else wants to have something tested I try it if my place (20 cm * 40 cm) is enough.


--- End quote ---

Thanks, man.  :)

Could you please check the limits of the Network Analyzer? Does it really gets to 10 MHz and not more (or less)?

Also, can you confirm that the software is complete, functional, and overall better than the sw that comes generally with bench scopes?

--- End quote ---

Limit will be 10 MHz because that is the limit of internal waveform generator. Scope bandwidth is better, up to 30 MHz.

You can download software for free and use it with audio card in PC. In fact, you can try Bode plot with it if you make out breakout cables for audio card. Of course within audio range and with limited drive..

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