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

--- Quote from: Galaxyrise on July 16, 2013, 06:18:55 am ---
--- Quote from: marmad on July 12, 2013, 03:51:29 pm ---This seems oddly reminiscent of trying to convince you that Rigol's High-Res mode produces the same results as everyone else.

--- End quote ---
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.


--- End quote ---
So I made the screenshots for you. I think that it's OK. No aliasing at all.
Carrington:

--- Quote from: K3KO on August 13, 2013, 10:12:35 pm ---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.

--- End quote ---

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
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