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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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