Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
Wim13:
--- Quote from: neilhao on June 07, 2013, 10:29:11 pm ---Hi guys,
I did a little about measuring EMI using DS2202, details can be found at https://www.eevblog.com/forum/projects/idea-about-measure-emi-using-oscilloscope/
I have a little question about the bandwidth of the FFT, it seems the BW of the DS2202 is far higher than 200Mhz?
--- End quote ---
Here some FFT pictures from my 2072 ( 70 Mhz) at 100 , 300 and 500 Mhz,
it is correct to the bandwidth measurements, -10 db at 300 Mhz and -20 dB at 500 Mhz ( 2 div down )
In FFT it is all in dB and in this example 10 dB per div, which gives a total different view.
Edit: the input level knob of the DSO, has no influence on the dB range displayed, has only impact on the S/N and noise floor
Edit2: In later post you can find a graph of the differences of the Bandwidth of the 2072 nad 2202
marmad:
Effects of using AUTO memory depth setting on DS2000s.
Two interesting things to note:
1) The AUTO setting is obviously meant to optimize the sample length to keep the sample rate as high as possible - but for some reason, Rigol decided to not use sample lengths beyond 14MPts. Perhaps because that's the standard maximum without the added option?
2) I wonder why at time bases < 500ns/div (which is where 14kPts @ 2GSa/s fills the display) the waveform update rate is not getting faster than when you just use the 14kPts setting? Obviously, the sample length is being decreased and the acquisition time is getting shorter - so the number of waveform's being captured should be higher than for a fixed 14kPt length - but it isn't.
g2:
I have had a Rigol DS2072 and I Got An Electric Shock from it.
I was using a 2 wire extension cord without ground (earth).
I found out when Rigol DS2072 is not grounded, there is 115 volt on Chassis ground,
and independently of the switch are On or Off.
If I switch Off the neutral wire, and Rigol DS2072 only get the phase, I got 230 volt on Chassis ground, and also on probe tip.
From Rigols user guide: Ground The Instrument. The instrument is grounded through the Protective Earth lead of the power cord. To avoid electric shock, it is essential to connect the earth terminal of power cord to the Protective Earth terminal before any inputs or output.
Of course it is best to ground the instrument; but I have many other electrical appliances that are not grounded and do not do that. And I do not have ground (earth) in most of the rooms in the house.
Is Rigol DS2072 OK ??
Is it only my Rigol DS2072 that is defective ?
How are other digital oscilloscopes ?
Do I have to change the house's electrical installation with ground (earth) ?
Hydrawerk:
--- Quote from: g2 on June 08, 2013, 08:22:36 pm ---And I do not have ground (earth) in most of the rooms in the house.
--- End quote ---
Are you from Russia??
Your scope is probably OK, but provide it a proper ground.
g2:
--- Quote from: Hydrawerk on June 08, 2013, 08:34:00 pm ---
--- Quote from: g2 on June 08, 2013, 08:22:36 pm ---And I do not have ground (earth) in most of the rooms in the house.
--- End quote ---
Are you from Russia??
Your scope is probably OK, but provide it a proper ground.
--- End quote ---
No, i am from Denmark. First in ca 1995 the installation off ground in all room in a house started.
All other instrument I have do not have that. and the do not have ground
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