Products > Test Equipment
Hacking the Hanmatek DOS1104?
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rhb:
I am currently testing one and the HW is great, but the UI is klunky to say the least, though it does appear to behave properly.  In particular the FFT is first rate, though the labeling is often incorrect.  But if you are used tolooking at DC to Nyquist spectra it works really well.  Just look at the sample rate and calculate Nyquist in your head.  Then divide by 10 to get the correct Hz/div.

I paid $206 from Hanmatek's Aliexpress store, but they are available as low as $180 on Aliexpress from other sellers
It has 140 MHz actual BW in the AFE and it's quite flat until the corner.

It seems to me a good candidate to jailbreak and modify.  Anyone else interested?

Have Fun!
Reg
tunk:
Most likely an Owon SDS1104 with a different front.
You could see if there's any info about this DSO.
rhb:
It's an Owon marked SDS1102 board in the 1102.  I've not opened the 1104 yet.  I'd expect the same.  However, I doubt that the FW is the same.  Fewer features most likely.  Possibly different FPGA.

But it's really nice HW and as is it *will* do most things, just in a convoluted fashion.  Why no "rise or fall" trigger I don't get.  But if we could turn it into an OSSW DSO dev system it would be really nice.

The major hurdle is writing a new UI using the existing buttons.  One could probably use the FPGA IP as is.  I blew up a GDS-2072E I'd hacked to MDO-2200E functionality and then blew it up.  It was an  Amazon $225 bargain.  Replacements were 2+ times that so I dropped the project.

My first hack is to install a 10-20Ah LiPo pack to run the 1104 & 1102 once the cells arrive.

Have Fun!
Reg

tunk:
You might be able to use these two alternative firmwares as a starting point for making something yourself:

Fnirsi 1013d by eevblog member pcprogrammer (there's also a thread on this forum):
https://github.com/pecostm32/FNIRSI_1013D_Firmware

Fnirsi 5012H by eevblog member ataradov:
https://www.eevblog.com/forum/projects/reverse-engineering-fnirsi-5012h/
rhb:
I looked at the Fnirsi scopes,  but they are just too limited to be worth the effort.  I have a tablet (1013D?) version I need to get rid of as I will never use it.  I don't like the tablet interface at all.  And there is very little cost difference between a 30 MHz Fnirsi and a 140 MHz Hanmatek.

First order of business with the Hanmateks is getting root access and sorting out the programming header.

FWIW My Rigol DS1102E has a rise time of 4.0 ns. The Hanmatek is 2.2 ns.  Leo Bodnar's pulser as judge.  At less than 1/2 the price of the Rigol damned impressive even if many years later.

Have Fun!
Reg
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