Experience with DSO 2074G

[egonotto]

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

[egonotto]

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


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egonotto

[egonotto]

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.

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egonotto

[egonotto]

Hello,


the imput amplifier are not good.

An offset affects the curve

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egonotto

[egonotto]

Hello,

some more pictures.

At 1kHz square and larger amplitude it shows a disturbed waveform.
At 1MHz square it looks ok.


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egonotto

[egonotto]

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

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egonotto

[egonotto]

Hello,

the generator of the DSO 2074G has also a AM function
But look at the picture

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egonotto

[egonotto]

Hello,

the AM function of the DSO 2074G sometimes work

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egonotto

[egonotto]

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)

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egonotto

[egonotto]

Hello,

now a x-y picture.

The contrast is bad

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egonotto

[egonotto]

Hello,

the DSO 2074G can trigger from all active channels with individual timebase

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egonotto

[egonotto]

Hello,

the DSO 2074G has a frequency counter.

But for low frequency he is bad



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egonotto

[egonotto]

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


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egonotto

[egonotto]

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

[MrW0lf]

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