REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol

[Teneyes]

Just wanted to post a reminder that this is something to be on the look out for if you hear rattling in your scope!  Obviously not good to have metal pieces loose around in there...

Hi Sparky
Sh!t , a rattle in my DS2072, and one retaining clip fell out
and another one rattling, I got it near the vent and working on getting that clip out,
Now where are the loops??

What will you do?
Fix it w/rebar-wire;D or an RMA??? I have already sent my DSO back Once.
DS2A1425xxxxx

[Sparky]

Check the fan.  On my scope one of the loose parts stuck to the fan motor and was held there by the motor magnets so shaking didn't dislodge it.

Thanks martinv! That's a good suggestion.  The loop could have lodged there, but I didn't see anything when I cleaned the back case.

Very stupid to rely on the solder alone to hold it in the board. At the least I would make a new one out of a paper clip cut in half, pushed through the hole and bent over on the underside before soldering back in the hole.

I like this idea SeanB, a paper clip is probably almost an exact fit.  If I repair it myself, I'll go this route!

Sh!t , a rattle in my DS2072, and one retaining clip fell out
and another one rattling, I got it near the vent and working on getting that clip out,
Now where are the loops??

What will you do?
Fix it w/rebar-wire;D or an RMA??? I have already sent my DSO back Once.
DS2A1425xxxxx

Hi Teneyes!  I get the feeling this issue is more frequent than first thought!  In your case, it is both retaining springs that have come loose?  I could not get the spring out through the vent and had to take it apart. 

I looked around for my loop and never found it...it could still be in my unit, which is a bit of a worry, or has fallen out.  I'm going with the latter because I inspected pretty thoroughly when I had the case apart.

For now, I'll use it as is.  The heat sinks are held on with thermal adhesive, so I doubt they will fall off in the short term.  But I'm not sure about long term; the springs are there for a reason...

Likely I will RMA it at sometime, but if it is no longer in warranty I'll do the mini rebar = paperclip fix

Mine is DS2A1427xxxxx

Good luck getting those loose parts out!

[Gecko]

I noticed a bug(?) when decoding RS232 communication with the DS2072:

I have a RS232-like communication, with TX on channel 1 (named DC on the scope) and RX on channel 2 (named DP).
Have a look at the attached screenshots: Serialdecode1.png shows the correct decoding for channel 2 on Decode2-RX. But this only works correctly if Decode2-TX is set to Channel1 (although it only decodes garbage from that because it has an inverse polarity). If I switch Decode2-TX decoding to Channel1 (like in Serialdecode1.png) or switch the Decode2-TX to off, it decodes the RX line wrong.

Has anybody else seen similar problems?

[Teneyes]

I noticed a bug(?) when decoding RS232 communication with the DS2072:

@ Gecko
Use RS232 Triggering

[Teneyes]

Sh!t, a rattle in my DS2072, and one retaining clip fell out
and another one rattling, I got it near the vent and working on getting that clip out,

I get the feeling this issue is more frequent than first thought!  In your case, it is both retaining springs that have come loose?  I could not get the spring out through the vent and had to take it apart. 

Well, I got 2 springs and 2 hoops out
See pic for fishing tool.
Everyone watch-out

Do I dare turn it on and have the heat sinks fall off?

Has anyone opened a DS2000 and seen any improvement in the spring-clamp anchors?

[Sparky]

Sh!t, a rattle in my DS2072, and one retaining clip fell out
and another one rattling, I got it near the vent and working on getting that clip out,

I get the feeling this issue is more frequent than first thought!  In your case, it is both retaining springs that have come loose?  I could not get the spring out through the vent and had to take it apart. 

Well, I got 2 springs and 2 hoops out
See pic for fishing tool.
Everyone watch-out

Do I dare turn it on and have the heat sinks fall off?

Has anyone opened a DS2000 and seen any improvement in the spring-clamp anchors?

Nice job Teneyes getting all that out with your custom fishing rod!!

I've been powering mine up anyways...the heat sink adhesive is holding for the time being...

I looked at the HW2.0 revision and it uses the same silly hoops!  Very unfortunate...but may be they solder those hoops better now???

[jsykes]

In looking at those loops I think when it happens to me, I will heat the loop with a soldering iron just enough to melt the plastic spacer a bit and slide it up closer to the loop end. Then after removing the solder from the board, press the loops back through the holes, bend the excess length of the ends 90 degrees, and solder them back. The bummer is that you need to remove the board to get to the underside.

[kliklax]

I noticed a bug(?) when decoding RS232 communication with the DS2072:

@ Gecko
Use RS232 Triggering

Triggering has nothing to do with decoding.  Separate things entirely.  You can pull in a waveform from a usb stick and use the decoders on it.

[tlu]

I read that RS232 decode works fine on another post somewhere but the trick is to have the parameters set up correctly like baudrate, parity bit, etc... Personally, I've not tried serial decoding yet on mine so my input on this very limited.

[Carrington]

Has this screen is a transparent EMI / RFI shielding foil? It seems a simple sheet of polycarbonate or something.
http://www.flickr.com/photos/eevblog/8022302444/#sizes/o/in/photostream/

[K3KO]

I thought I saw a response curve for a 2102 somewhere in the 111 pages of postings.
The reason I ask is that I want to compare it to what I'm seeing with a 1102E which I'm unhappy with.
The picture below was taken right at the output of an HP8657B terminated, measured with the supplied probe at 10x.  The voltage level is 1 V.  RMS.   Shown for comparison is the same test setup with a Tektronix 2225 50MHz scope..   

I had ordered a 2072 for hacking but I can't find anybody who can give me a firm shipping date in the US.

Has the "2102" got a flatter response curve like the TEK2225 .  A 2+ db rise shown by the DS1102E is pretty unacceptable in my opinion.

[Hydrawerk]

Original post:
https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg262688/#msg262688

This seems oddly reminiscent of trying to convince you that Rigol's High-Res mode produces the same results as everyone else.

I'm probably just inviting more abuse onto myself, but the Rigol High-Res mode is so different from what I expected that I am curious to see comparisons.

How do other scopes (especially the Agilent) handle a 40mVpp 100kHz sine wave at 1ms/div 10mV/div?  Both max memory depth and 1MSa/s.

So I made the screenshots for you. I think that it's OK. No aliasing at all.

[Carrington]

I thought I saw a response curve for a 2102 somewhere in the 111 pages of postings.
The reason I ask is that I want to compare it to what I'm seeing with a 1102E which I'm unhappy with.
The picture below was taken right at the output of an HP8657B terminated, measured with the supplied probe at 10x.  The voltage level is 1 V.  RMS.   Shown for comparison is the same test setup with a Tektronix 2225 50MHz scope..   

I had ordered a 2072 for hacking but I can't find anybody who can give me a firm shipping date in the US.

Has the "2102" got a flatter response curve like the TEK2225 .  A 2+ db rise shown by the DS1102E is pretty unacceptable in my opinion.

https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg231182/#msg231182

https://www.eevblog.com/forum/testgear/sniffing-the-rigol%27s-internal-i2c-bus/msg270634/#msg270634

https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg254819/#msg254819

[K3KO]

Thanks Carrington, the WIM13 curves were what I was looking for. 
Evidently the Vertical Input channels for the DS1102 are deficient -- at least in my case.  I suspect is is the design since both channels exhibit the exact same trand.

Yes, I did the self calibration (several times in fact).  The Tektronix result indicates that the generator output appears quite constant over the range of frequencies looked at (it had better be since the generator was recalibrated professionally not too long ago at significant expense).

I can't live with 25% errors in measured voltages over the 20-70 MHz range.   I'm going to try and see if the unit can be returned as being defective.   

[K3KO]

Looking further into the "vertical amp" response of the DS1102E,  I attached the Tektronix probe, compensated it and ran a frequency response curve.

VIOLA.  The response flattens to acceptable levels and barely makes the 100 MHz rating.

The supplied probes are crummy....

Brian

[etc6849]

Newbie X-Y plotting question:

I was trying to display oscillofun on my Rigol DS2072 (aka DS2202) , hacked and running the latest firmware.

It seems it only displays normally with a sample rate of 1GSa/s and a memory depth of only 700 pts.  If I try to increase the memory depth, the display gets very very slow at updates (basically unusable).  I also noticed that the manual states memory depth is not applicable to X-Y mode, but the option is not grayed out and you can actually change it?!?  Any advice?  I'd also like to use persistTime in X-Y mode, but this option is grayed out; while the manual does not state it is not available?!?

I must say, I'm very jealous of Dave's Agilent he used in the YouScope video.  It seemed to work much much better in X-Y mode than my Rigol DS2072?!?  I also tried YouScope, but the display was nothing like the Agilent 2024A in the Dave's video (starting at ~3m 28s):

Could it be that the Agilent 2000 series scopes out perform the DS2072 in X-Y mode by leaps and bounds or is there some setting I'm missing?!?

The manual states:
"The following functions are not available in X-Y mode:
Auto measure, cursor measure, math operation, reference waveform, delayed sweep, vector display, HORIZONTAL POSITION, trigger control, memory depth, acquisition mode, Pass/Fail test and waveform record."

[PA0PBZ]

I was trying to display oscillofun on my Rigol DS2072 (aka DS2202) , hacked and running the latest firmware.

It seems it only displays normally with a sample rate of 1GSa/s and a memory depth of only 700 pts.  If I try to increase the memory depth, the display gets very very slow at updates (basically unusable).

In X-Y mode you are not really capturing a waveform, it's more like watchin a movie, so what you want is the fastest screen update possible. I'm not sure why you can even increase the memory depth, it makes no sense to me, you don't want any memory at all in this mode. If (and it looks like they do) you only update the screen after capturing a full memory worth of data things will get slow. So while it is normal what you are seeing I have no idea what Rigol is doing with memory in X-Y mode.

 

[Carrington]

I had ordered a 2072 for hacking but I can't find anybody who can give me a firm shipping date in the US.

Can you measure the frequency response when you receive it?
Thanks.

[K3KO]

Not even ordered.  I believe the freq response of the 2xxx series scopes is given here.

https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/?action=dlattach;attach=57539

Brian

[Carrington]

Not even ordered.  I believe the freq response of the 2xxx series scopes is given here.
...
Brian

Yes, I know, is just to have another reference.

[Carrington]

Has this screen is a transparent EMI / RFI shielding foil? It seems a simple sheet of polycarbonate or something.
http://www.flickr.com/photos/eevblog/8022302444/#sizes/o/in/photostream/

I'm not the only one who thinks so.
But the conductive surface should be behind. And it can be checked only if someone have this side accessible, not my case.

[Electro Fan]

Anyone hear from Marmad? - maybe just on vacation, seems like the longest he hasn't posted on this thread since page 1.

[poida_pie]

It seems to me that the firmware bug
from page one of this massive thread
" 14) Bus decoding does not decode the full ASCII set. Missing characters:[ . , : ; - _ ! " § $ % & / ( ) = ? ] - everything between square brackets (except spaces).
[FW v.00.01.00.02? / FW v.00.01.00.05 / FW v.01.00.00.03 / FW v.01.01.00.02]"

has now been fixed in fw 00.01.01.00.02
At least in my testing at 9600 baud the DS2072 of mine shows nearly all characters from 32 (dec) to 47 (dec) inclusive in an accurate way.

See attached screen print.

(Test conditions:  Arduino, softwareserial library using pin 4 for TX data. I toggled pin 10 to give a good trigger point for the DSO, this is shown in ch2 trace.)

So this is good news, eh?
 

[Electro Fan]

It seems to me that the firmware bug
from page one of this massive thread
" 14) Bus decoding does not decode the full ASCII set. Missing characters:[ . , : ; - _ ! " § $ % & / ( ) = ? ] - everything between square brackets (except spaces).
[FW v.00.01.00.02? / FW v.00.01.00.05 / FW v.01.00.00.03 / FW v.01.01.00.02]"

has now been fixed in fw 00.01.01.00.02
At least in my testing at 9600 baud the DS2072 of mine shows nearly all characters from 32 (dec) to 47 (dec) inclusive in an accurate way.

See attached screen print.

(Test conditions:  Arduino, softwareserial library using pin 4 for TX data. I toggled pin 10 to give a good trigger point for the DSO, this is shown in ch2 trace.)

So this is good news, eh?

Very good news, and very good work!  Nice work!

Gald to see the characters are there, but a question:

In looking at various publications of ASCII tables they seem to show characters 32-47 in charts like this:

http://www.ascii.cl/

This seems to show a somewhat different list/order for 32-47; maybe Rigol lists them in a different order?

EDIT:  - after studying it more closely the order looks fine, I think it's good!

Thanks

[alank2]

Not sure if this bug has been noted yet, but if it is in screensaver mode when you power it down, it will be in screensaver mode as soon as you power it up...