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Wow! $123 Hanmatek DOS1102 initial comments

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rhb:
Not sure.  I haven't used the DS1202-ZE since I got it. So highly likely user error.  I'll check.  I bought it when they introduced them at $300.  I had to see.

For $300 a 24 MSa 200 MHz DSO is worth having for rare problem.  Same with my Owon XDS2102A 12 bit, 10 MSa scope.  I actually don't care if they are utter crap as a scope, I bought them for  deep one shots.  They are high speed data loggers.

Edit:

Here's a better measurement of risetime with infinite persistence.  0.35/2.48e-9 = 141 MHz.

Aldo22:

--- Quote from: rhb on December 03, 2023, 04:58:20 pm ---Well, That doesn't look as if it's modulated for starters.   But hey, if you like it, go for it.

--- End quote ---
Sorry, I misunderstood (learning  ;) ).
Is the attached screenshot what you meant?

rhb:

--- Quote from: Aldo22 on December 03, 2023, 04:09:43 pm ---
--- Quote from: rhb on December 03, 2023, 03:01:08 pm ---Which one would you prefer?

--- End quote ---
The Hantek DSO2C10 for $130.  :-DD

--- End quote ---

This is the post I was referencing. The last 2 plots are the correct analog to what I was doing

The width of the FFT bins is 1/(n*dT).  The maximum frequency is 1/(2*dT).  The 10k buffer works because it's aliased.  As I reduce the sample rate the sidelobes spread out as T=n*dT increases.

A proper waterfall display has been on my "To Do" list for quite a while.  Time for me to grind my way through the math and replicate the Instek SA software so other OEMs can include the feature in DSOs and SDRs.

I was comparing to all the DSOs I had handy.  And a 1GHz LeCroy is probably not a fair comparison nor was it handy.  The DS1102E was my first DSO.

The Hanmatek appears to be the Owon minus the internal SMPS.  The DOS1104 has 5 mV/div instead of the 20 mV/div of the DOS1102.  I ordered a DOS1104 from Aliexpress for $206 for the sake of the greater sensitivity.

I bought a Hantek 3 in 1 which was very poor.  Replaced it with an Owon HDS272S which is a proper scope with limited controls.  I had always assumed that Hanmatek was a step down from Hantek, so I was quite surprised when I measured the risetime.

Have Fun!
Reg

Aldo22:

--- Quote from: rhb on December 04, 2023, 02:10:52 pm ---The last 2 plots are the correct analog to what I was doing

--- End quote ---
Thank you!


--- Quote from: rhb on December 04, 2023, 02:10:52 pm ---I had always assumed that Hanmatek was a step down from Hantek, so I was quite surprised when I measured the risetime.

--- End quote ---
I compare the Hantek DSO2C10 with the Hanmatek DOS1102 because it is in a similar price range and also has 2 channels and about 100MHz bandwidth.
Here are two more screenshots from the Hantek:
Rise time measured with a Si5352 and sensitivity.

Have Fun!  :)

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