EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: egonotto on April 26, 2017, 07:08:09 pm
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Hello,
I got a used DSO 2074G.
It is a 4 channel 70 MHz USB Oscilloscope.
Vertikal-sensitivity 10 mV/div - 5 V/div
Samplingrate 200MS/s (? pro channel ?)
It has also an arbitrary wave generator with
200 MS/s 12 bit and 4KS
The PC-Programm is frugal.
I have few crashes in the last 24h.
Installing the driver was not easy for me.
On a USB-hub which I use for some PicoScopes and Analog Discovery
I was not able to got the driver working.
On a USB3 hub it works now.
As I don't found much about this scope on internet I think I should
report my experience here in the next days.
First question: Are the 200MS/s for each channel?
Look at the picture 10ns_ch 1 2 3 4.png. All 4 channel are on and it seems
it is 100MS/s
In the picture 10ns_ch 1 2 3.png channel 4 is off and as seems now we have
200MS/s
To be continued
egonotto
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Hello,
it seems that the DSO 2074G is from Hantek (DSO3064A ?)
The buffer length per channel can be
10 kS
1 MS
2 MS
4 MS
8 MS
12 MS
16 MS
The usage is not easy to see.
If you want have 2MS with a sample rate of 10MS/s you have chose 100us/div
and buffer length 2MS. Than you get 200ms.
You can that data save to a txt-file. But change the time/div not, because this comes in the header of the file. If you change the time/div than you have this wrong in the txt-file and you lose the time information :-\
The file look like:
#CHANNEL:CH3
#CLOCK=100uS
#SIZE=2097152
#UNITS:V
1.0039
0.4392
-0.1255
-0.7216
-1.2549
-1.6314
-1.8824
-1.9451
-1.8196
-1.5059
-1.0667
-0.5020
0.0941
0.6902
1.1922
1.6000
1.8196
1.8824
1.7569
1.4431
1.0039
0.4392
-0.1255
.....
start.png shows the associated display of the scope
To be continued
egonotto
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Hello,
now I try the build in generator with a 10 MHz square.
It has much jitter as you can see.
With sine you got no visible jitter.
To be continued
egonotto
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Hello,
the imput amplifier are not good.
An offset affects the curve :(
To be continued
egonotto
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Hello,
some more pictures.
At 1kHz square and larger amplitude it shows a disturbed waveform.
At 1MHz square it looks ok.
To be continued
egonotto
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Hello,
the generator of the DSO 2074G has a sweep function, if you choose sinus.
But there a spikes and therefore you can not use it :(
To be continued
egonotto
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Hello,
the generator of the DSO 2074G has also a AM function
But look at the picture :(
To be continued
egonotto
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Hello,
the AM function of the DSO 2074G sometimes work :)
To be continued
egonotto
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Hello,
the risetime with only one channel on and with 2 channels on.
100MS/s is far too low :(
The signal is from RIGOL DS2072 trigger out with risetime shorter than 1.5ns
The same signal with a PicoScope 5243A (official a 100MHz scope)
To be continued
egonotto
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Hello,
now a x-y picture.
The contrast is bad :(
To be continued
egonotto
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Hello,
the DSO 2074G can trigger from all active channels with individual timebase
To be continued
egonotto
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Hello,
the DSO 2074G has a frequency counter.
But for low frequency he is bad :(
To be continued
egonotto
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Hello,
my DSO 2074G problem with the input impedance.
The signal is with a 10:1 probe.
The same signal with 100mV/div and 50mV/div
To be continued
egonotto
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Hello,
my DSO 2074G has problem with the sync of the generator.
In DSO_2074G_arb.jpg you see an arbitrary waveform I have defined.
In DSO_2074G_sync.jpg you see the waveform (green) and the sync out(yellow) in the scope. :( :( :(
I ask me is the DSO 2074G a scope or is it a adventure game?
To be continued
egonotto
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I ask me is the DSO 2074G a scope or is it a adventure game?
Scope working wrong is happy thing for hobbyist! Any time lacking inspiration what project to do next you can try to sneak around scope limitations :-/O