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

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marmad:

--- Quote from: jlmoon on June 23, 2014, 07:11:18 pm ---I know this might be a bit off topic, since we're discussing the 2000 series scopes,
--- End quote ---

Not off topic at all - questions like these are precisely the reason for the thread.  ;)


--- Quote from: jlmoon on June 23, 2014, 07:11:18 pm ---Has anyone noticed any vertical amplifier offset (no signal applied with 50 ohm termination on input AC or DC coupling selected) in the range of 100 - 200 uV when in the 500uV / div range.  I also noticed that channel 1 has a bit more than channel 2.  My particular model is a DS2202, are we splitting hairs with a Chinese scope playing in the grass?

--- End quote ---

Yes, I also have some offset at 500uV, but it's within the DSOs specs: ±0.1 div ± 2 mV ± 1% offset value

Keep in mind, 500uV is just a magnification of 1mV. So any offset at 1mV will just be doubled.

jlmoon:
Okay  Marmad,

Thank you for your input, I had not referred to the the specs as of yet.  At 1mV & >  all is good.


Galaxyrise:

--- Quote from: marmad on June 23, 2014, 07:20:12 pm ---In the attached screenshot, I have my trigger position set to screen left as you suggest - but it would still take 7 seconds before the buffer is filled (and I would start to see the trace). So you have to keep an eye on the location of your trigger position within the current sample memory depth - not just the screen memory.

--- End quote ---
Good catch.  To get the effect I was after, that means also choosing a memory depth so that the waveform is the entire screen.  That's what I get for giving usage advice away from my unit!  As another usability caution, you can actually set the trigger position to be far to the left of the waveform.  You want the "T" chevron to still be pointed down, not to the left.

Another tip that just occurred to me for measuring low frequency stuff like heartbeats is to turn on the bandwidth limit for that channel.  That'll probably cut the trace thickness in half.

Purevector:

--- Quote from: Purevector on June 21, 2014, 07:24:16 pm ---I think I may have found a bug.  Since upgrading to 3.00.01.03, whenever I plug in the scope, it automatically powers up.  Before it just used to fade the power button.  The power mode in the settings is Default, not Open.  I did try both.  Going back to V2 did not fix the issue.  When I turn the scope off and unplug it it takes a few seconds for the power led to completely turn off.  If I then plug the unit in, it boots up on its own.

--- End quote ---
I am pretty sure the newest firmware does not change the scope back to regular power on mode if it is changed to "open" mode. Has anyone tried this? Is there some way to report this to Rigol. The official 3.00 version doesn't have this setting so I am hesitate of simply writing to Rigol NA support.

Also, if there are any smart hackers out there that can figure out how to change the setting back, I would greatly appreciate it.

Cheers.

Purevector:

--- Quote from: Teneyes on June 24, 2014, 03:28:43 pm ---I went back to FW 00.01.00.05 and main power connect still starts my DS2072
I use SCPI command to get to LAST

--- End quote ---

That setting controls the setup information at startup; that's not what I'm talking about.  In 3.01 there is a new setting called PowerStatus (you can see if if you scroll to the next page)  The options are Open or Default.  According the newest DS2000 manual on the Rigol website, Open mode powers up the scope when you plug it in, and Default just "energizes" the unit and you have to press the power button to power on the scope.  I am stuck in Open mode after testing that setting and cannot get back to Default.  I can change the setting and it appears to save the value, but the scope still powers up by itself.

We just had a power failure last night and the scope was on this morning because of this.  I'll have to keep it unplugged to prevent it running if power is lost :(

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