EEVblog #1146 - New Low Cost Rigol MSO5000 Oscilloscope

[Fungus]

I have to put that into perspective….
Having a look in the specs of the supply, it claims that ripple will be under 1mVrms.
And the rigol just can´t display it, it´s own noise will cover this, regardless of any filter attempts.

Ok, so there's basically no ripple. 

(try increasing the load on the power supply until some appears....)

[Martin72]

Yes and it´s remarkable, because it´s a really cheap supply.
A little annoying, but I don´t pay attention on other scopes in the last years, whether they would show the same behaviour like the rigol on AC-coupling, see pics.

[Fungus]

Yes and it´s remarkable, because it´s a really cheap supply.

It will have ripple, it's just a question of load.

A little annoying, but I don´t pay attention on other scopes in the last years, whether they would show the same behaviour like the rigol on AC-coupling, see pics.

I hope so. The whole point of AC coupling is that the low frequency components of the signal decay towards the center. 30Hz isn't fast...

[Martin72]

it's just a question of load.

Measurements were taken at 2.5A load, maximum load was 3A...
(I use a cooking plate, no joke…)

[Fungus]

it's just a question of load.

Measurements were taken at 2.5A load, maximum load was 3A...
(I use a cooking plate, no joke…)

It might have a massive amount of capacitance on the output, but that's generally regarded as a bad thing in a PSU.

[Clint]

Anyone seen any UK deals on these I am going to order a 5074 this week and join the fun

[cruse123]

Excuse me, has anyone tried the XY mode in this oscilloscope?

I have ordered an MSO5074 a few days ago and am now happily playing around with it. It seems that the line in XY mode is too thick. Use BNC cables to directly connect waveform generator outputs to oscilloscope inputs, resulting in a very thick circle. Even if couple modes of two channels are both set to GND, there is still a pretty large square in the center of the canvas. Tried different time base and high-res mode, but no big improvements.

I have used several models of oscilloscope, but none of them show such a thick pattern, even the lower models of Rigol. Is there any advice on settings? Thanks in advance!

[TK]

Your vertical setting is at 100mV/div and it looks like the thick trace is due to the high noise floor of this scope

[fact]

My MSO7000 shows exactly the same behaviour even at large input signals and low sensitivity settings. I hope Rigol addresses the problem in a future firmware update like they improved the beam width in normal mode in the last update.

[Martin72]

I hope Rigol addresses the problem in a future firmware update

Ah, hope, rigol, firmware update....This wouln´t go together 
Joking, "End of january" say wrote me once - Now, they have one day left...

[amx]

Hi all,
I am a looking for a new oscilloscope, and the Rigol MSO 5000 it seems really powerful.
But I scared about a big list of bugs, and also can you please say me about UI is laggy?
I have a DS2072A and for me he UI is laggy...
And now I want to sell my DS2072A and buy some another scope....

[bd139]

It's laggy. Not unusable and around the same laggy as a DS1054Z but it put me off buying one. Went with Siglent SDS1202X-E and standalone cheap Saleae LA as it seemed to be a good compromise and am happy so far.

A point to make on the built in generators in the MSO5000 as well - they are poorly specified compared to standalone units as well.

[RedCali]

Hi @all

i followed that threads about the MSO5000 since a long time
Still waiting o Bode blot option :-)

Read something about the "Statistics" and "Histogram" capabilities - had anybody already tried those features? :-D
Would be nice if someone could share some shots how those options work and look like

Thanks for your efforts, your work and sharing your knowledge

RedCali

[Martin72]

Hi,

For those who might be interested in, the actual user manual (may 2020) is now avaible in german:

MSO5000 User Guide German Language

[ve2mrx]

Hi everyone!

Thanks to the 37 pages of posts you wrote here and the other related threads, I got myself a Rigol MSO5074 (with promo bundle) for hobby work. Lucky me, a job arrived a few days later that will benefit from it too!

Also, Rigol released a new firmware:

v00.01.03.00.01 2020/04/13
     -Add bode map function

A patch is available in the hacking thread, but I haven't tested it.

73's,
Martin

[fivefish]

Yes, I have the same freaking problem. The XY on my old DS1054 looks much better than on this newer/advanced MSO5074. It's like you gave someone a fat sharpie pen and told them to draw in XY mode... as opposed to giving someone a ballpoint fine pen.

I sent photos to Rigol showing what the FATSO5074 is doing vs. the older DS1054Z in XY mode.

Excuse me, has anyone tried the XY mode in this oscilloscope?

I have ordered an MSO5074 a few days ago and am now happily playing around with it. It seems that the line in XY mode is too thick. Use BNC cables to directly connect waveform generator outputs to oscilloscope inputs, resulting in a very thick circle. Even if couple modes of two channels are both set to GND, there is still a pretty large square in the center of the canvas. Tried different time base and high-res mode, but no big improvements.

I have used several models of oscilloscope, but none of them show such a thick pattern, even the lower models of Rigol. Is there any advice on settings? Thanks in advance!

(Attachment Link) (Attachment Link)

[Ctrlocti]

sorry if I missed it but what's the current status with the hi-rez 12bit mode? Martin72 in  post584 demonstrated its shortcomings.

[oliv3r]

I see that we have bags and front covers for the MSO5000 available now too; but I find them to be a little bit crazy expensive ... 80 euro's for a piece of plastic? 150 for a shoulder bag? That's really insane. Sure 'pro's will bay that ...

So do we know any cheap knock-offs? or are there 3d files for the front cover so we can print it? Or know of alternative tricks?

[Martin72]

For my Siglent SDS2K+ I´ve bought one similar like this:

https://www.amazon.de/Kamerakoffer-unisversal-wasserdicht-wetterfester-staubdichter/dp/B07DZK3R43/ref=sr_1_13?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2XGTNKZ6JZLQN&dchild=1&keywords=messger%C3%A4te+koffer&qid=1597266652&sprefix=Messger%C3%A4te+%2Caps%2C148&sr=8-13

With suitable dimensions.
So I don´t need a frontcover or a bag - It´s a two in one solution....

[Martin72]

https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/msg2974750/#msg2974750

This was the "final" case for it...

[CChin254]

I did a IC Identification for the back side of the Main PCB of this device:

[thm_w]

So it has multiple temperature sensors, but the fan is not PWM'd as far as I remember.
Maybe it will shut down if it gets super hot.

[CChin254]

Updated IC Identification:



My attempt at drawing the block diagram as a high school student:

[amx]

Hi CChin254 I do not understand why they use Spartan 6 for communication between Kintex and Zynq the both Kintex and Zynq have a Gigabit Transceivers the more efficiently would be use GTX for sending data between Zynq and Kintex...
Probably Spartan 6 placed for other purposes...

[danosimo]

Hey Alexvg (and everyone),

Based on your nice work about lowering the temps on our MSO5k scopes I quickly put together a design for 3D printing that should resemble yours (I am not good with scissors, cut myself every time so this was easier). So this way we can all 3D print the structure to put the fan on. Attached is the .STL file to print. This one I have made for a 90mm fan, currently running on 5v (with a small regulator), though it is a 12v fan, but noise can be an issue depending on the RPM the fan you use. I have also put a 80mm (15mm thick) 5v fan for the inflow air, though after testing the most impact is clearly the reversed air on the main fan location with the structure forcing air current through the right places. I have confirmed that the temps can be lowered 10+C degrees, It was ridiculously hot on stock config (mine was showing 58c at the protocol analyzer connector in the front and some of the BNCs).

One thing that needs to be said is the placement of the scope on the bench, that is if you have obstacles behind it so that the hot air stays lingering or not. In my particular case the unit is against the wall (bad choice but no space) and so this may actually make a difference, leaving a bit of room behind will help. In any case I have confirmed with the attached design that the temps are really reasonable now (45c at the front connector). Clearly when they decided to rev up the main board one of the changes (if no the only) was simply powering the current fan setup from lower volts (is it 7v?) instead of 9v originally, and while it does make it quieter, it sure makes the unit suffer and the user very toasty!. Not good in summer time for sure. Between the 3D printer and the scope I think I am losing about 2 pounds a day sweeting like a pig..... Oh, and one more thing, I would not recommend to print this on PLA for obvious reasons, ABS seems to do well.

Anyway, so here is my two cents on this. Again, thank you for the help and bringing this to our attention and finding a very clever and effective solution. Kudos!