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REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
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rowifi:
Back in business - re-installed and F6 pressed ( repeatedly ) as per Rigol instructions.
Thanks
Fagear:
I've done a small video with DS2072A working on my LED controller project.
Ivan7enych:
Hello,

I've bought the Rigol 2072A as a second oscilloscope to my old Tek TDS744A (4 chanels, 500MHz), and I've compared some features of both oscilloscopes.

1. I've linked together 2 oscilloscopes (Trig Out from 2072A to Tek external Trig input) (it can be useful to observe the same event on both screens), and connected inputs of both oscilloscopes to the signal gen output (Rigol DG4062, pure sine 50MHz). I've seen stable pure sine on 2072a, and jumping signal on Tek (see picture). When I link in opposite (Trig Out from Tek to external Trig input of 2072a), I've seen stable picture on both oscilloscopes.

It seems, that Trig Out of 2072a is not hardware, but a kind of software (from FPGA logic) and it is suitable for low frequencies only, not higher than 1MHz I think.

2. I've tested rise time on the same test signal (Tek probe signal, I don't know exactly it's rise time). Ground has been connected as close as possible to the tip of the probe (1-2cm length) to make signal as pure as possible.
1 - Tek 1GHz Active probe
2 - 2072a (unloked to 300MHz)
3 - 2072a with 100MHz band limit option

500MHz and 300MHz really makes the difference, but I like it, fine picture, almost no overshoot on rigol.
Ivan7enych:
3. FFT math on the Rigol looks very disappointing to me, very slow user interface (slower than my old Tek), low resolution (only 2048 points from the record), no averaging options at all (both scalar and vector averaging). Tek TDS744 with it's old slow user interface in that terms is a much better choice.

4. protocol decoding and triggering (the main feature I missed in Tek) - triggering works fast, but decoding makes the oscilloscope very slow, may be 2 frames per second. UI of triggering is strange, for example I want to see RS232 data as ASCI chars, I see interesting place to me, and want to trigger on specific letter 'D' for example. For that purpose I need to find somewhere ASCI codes table and find the number of that letter.  |O Just because triggering UI works with numbers only, no letters, no HEX. :-//

I've found picture with another example, I2C decoding shows hex values, triggering works with dec values only.
Ivan7enych:
5. Intensity grading - very nice feature, but sometimes it works, sometimes doesn't and I don't know the all reasons of that.
Here is 50Mhz AM modulated sine, one picture is very nice, another shows moire artifacts. Changing number of recorded points sometimes turns on and off the intensity grading.
And a comparison pictures for the same signal from Tek, one with instavu option (old type of intensity grading), another with peak detect mode.

That's all from me for now. I hope it will be helpful for somebody to see good and bad points of that oscilloscope.  :)
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