Rigol DS2072A question / oddity

[Wmacky]

Just a couple questions:

My main concern is the waveform intensity adjustment. ( It appears to do nothing?)

If I go to the display menu, the graticule brightness adjust works as expected. I can turn the graticule completely off.
If I then select Waveform intensity from the menu. the indicator appear to shows the adjustment happening, the actual waveform brightness does not change, or if it does it's a very slight and hard to tell?  Looking at Daves 2072 video the adjust works as I expect, turning the brightness way down?   I'm new to these new DSO's, so am I misunderstanding something?  Is there a menu setting I'm not finding, or understanding? I couldn't imagine this could possible be a hardware issue?


Last question:   How much of a noise increase should I expect going from 70MHZ to 300MHZ?   The difference was way more dramatic than expected at the minimum setting and with nothing on the inputs. It appears to have tripled?

[DanielS]

Persistence / intensity will not produce any major visible difference unless you have a waveform with some form of modulation or noise on top of it since a periodic fixed signal will have all of its waveforms stacked almost exactly on top of each other, which will produce a slightly fuzzier trace.

Depending on how fast your trigger rate is for whatever you are trying to use intensity with, you may need to increase the persistence duration in the acquisition menu.

[Wmacky]

 It was very late last night so I only got to test with nothing on the inputs, so no modulation, but lots of noise.  I did notice in Dave's video he seemed to be able to turn the "entire" brightness way down, where I was not able to see any difference when making the same adjustment with no input. Perhaps there were setting  differences as you mention. I guess my question is if there are certain settings / conditions were the intensity / brightness adjust appears to have no effect? Shouldn't I have seen a change with about 6 mv of noise?


Here's Dave's video I was referring to. Go to 11:30 in the video to see the intensity adjustment



We both have open inputs, and min persistence, and his intensity adjustment makes a huge difference, were I see no difference at all when adjusting. My brightness does not change? Unless there is another setting difference I don't really understand why I don't get the same result?

Dave, Have you seen this thread?  Comments?

Just trying to rule out a possible defect on a new scope to make sure a return in not in order.

[Wmacky]

Bump


Any DS2072 owners out there? 

[Rory]

DS2072 here. Try this. Use the probe cal signal as your source. Start off with your sweep time to 20.00ms, then go to Display menu and try adjusting the WaveIntensity.

[Wmacky]

Thanks! I' ll jump on it as soon as I get home.

So far I've tried a few different settings, but all with nothing connected to the inputs, and none allowed a change in brightness. I have a audio wave generator I'll use for more testing. 

I hope all is well, and I  just converted to 300 MHZ with all options last night.

[tautech]

Averaging & Persistance OFF
Experiment with Trigger Level

Intensity Grading shows up much better with a signal that has some Jitter.

[electricMN]

...

I hope all is well, and I  just converted to 300 MHZ with all options last night.

Hi, I'm new here and have a MSO2072A arriving on Thursday. I'm wondering how you converted your DS2072 to 200MHz with all options? Any incite on how to achieve this would be greatly appreciated.

Thanks.

[Wmacky]

...

I hope all is well, and I  just converted to 300 MHZ with all options last night.

Hi, I'm new here and have a MSO2072A arriving on Thursday. I'm wondering how you converted your DS2072 to 200MHz with all options? Any incite on how to achieve this would be greatly appreciated.

Thanks.

Read the last few pages of this thread.

https://www.eevblog.com/forum/testgear/rigol-mso2000-series-hacking/

[electricMN]

Hi, I'm new here and have a MSO2072A arriving on Thursday. I'm wondering how you converted your DS2072 to 200MHz with all options? Any incite on how to achieve this would be greatly appreciated.

Thanks.

Read the last few pages of this thread.

https://www.eevblog.com/forum/testgear/rigol-mso2000-series-hacking/

Thank you very much.