Products > Test Equipment
Hantek HDG2002B AWG: 5Mhz or 100MHz? Let's see!
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robert_:

--- Quote from: markone on February 08, 2016, 11:45:24 am ---With all the respect to everyone that spent effort on this thing, i would warn you about a fact : you are following the same path that me and other people here did, spending hundreds of hours for a joke device.

Try to make a sweep and look to signal amplitude, try to modulate a signal and see what you obtain, try to use the noise function and see what you get, try to set screen brightness and other things and see what happens when you recycle the power....

--- End quote ---
Im well aware its crap. It does work for most of my needs, and i cant really sell it for any price thats worth the trouble (id imagine to have an anrgy buyer that didnt expect to buy crap). So its better than to throw it away...
Still, probably the last chinese-designed instrument i bought. Had enough of it by now (Uni-T, Rigol, Voltcraft and now Hantek all did disappoint me). Seems to be the same as for china-made metalworking machines, not worth the trouble you have with them in the long run. Had a big, not cheap chinese made drill press thats a whole heap of scrap iron with dangerous electric wiring on it. Welding machine that overheats within short time, "copper winding" means copper primary (winding window half empty) and alu secondary, and so on. I wanted to buy a chinese made milling machine, had a good look at it and had the shop owner get angry as i got out a flashlight and went to inspect the ways and bearing surfaces. No surprise why, as the whole crap was made to fit with an angle grinder it seems... Nice looking surface on top but inaccurately made, so they made it fit on the bottom part. So i went away and got a good old Deckel made in the early 60s for about the same price and got something thats actually useful.
markone:

--- Quote from: robert_ on February 08, 2016, 04:54:23 pm ---
--- Quote from: markone on February 08, 2016, 11:45:24 am ---With all the respect to everyone that spent effort on this thing, i would warn you about a fact : you are following the same path that me and other people here did, spending hundreds of hours for a joke device.

Try to make a sweep and look to signal amplitude, try to modulate a signal and see what you obtain, try to use the noise function and see what you get, try to set screen brightness and other things and see what happens when you recycle the power....

--- End quote ---
Im well aware its crap. It does work for most of my needs, and i cant really sell it for any price thats worth the trouble (id imagine to have an anrgy buyer that didnt expect to buy crap). So its better than to throw it away...
Still, probably the last chinese-designed instrument i bought. Had enough of it by now (Uni-T, Rigol, Voltcraft and now Hantek all did disappoint me). Seems to be the same as for china-made metalworking machines, not worth the trouble you have with them in the long run. Had a big, not cheap chinese made drill press thats a whole heap of scrap iron with dangerous electric wiring on it. Welding machine that overheats within short time, "copper winding" means copper primary (winding window half empty) and alu secondary, and so on. I wanted to buy a chinese made milling machine, had a good look at it and had the shop owner get angry as i got out a flashlight and went to inspect the ways and bearing surfaces. No surprise why, as the whole crap was made to fit with an angle grinder it seems... Nice looking surface on top but inaccurately made, so they made it fit on the bottom part. So i went away and got a good old Deckel made in the early 60s for about the same price and got something thats actually useful.

--- End quote ---

Same things here, nowaday lot of things are actually made there, when they ary bad, they are really bad.

Speaking about myself this HDG2002B close the circle of all pieces of cr@p that i bought before aware of, Hantek is now on the black list (in good company) and i have to thank Dave for all the fantastic published  tear down videos that avoided me to buy some other useless things.

I remember when i saw one of your pictures where the hantek standed under a Lecroy Wavejet, it seemed a bit weird to me  ;)

robert_:
Just got around doing it.
U13: ADUM3401CRWZ
U14: ADUM3400CRWZ

U1: LT1117-3.3
U15:LT1117-ADJ

The ADUM need to be -C* (maybe -B works, but -A doesnt) speed grade.
Voltage regs need to be fitted, and all 0R links removed. Power to the earth referenced side is then 5V at <2A peak ( J906 [arrow]2xGND  2x +5V)

I did manage to reapply the hack, for some reason the system.inf got replaced by a default version stored somewhere (wtf). Calibration suvived though, so it didnt overwrite the wohle filesystem.


--- Quote ---I remember when i saw one of your pictures where the hantek standed under a Lecroy Wavejet, it seemed a bit weird to me  ;)
--- End quote ---
Well, it stands next to a Waverunner HRO 66zi at the moment... That wavejet was here just for sale and i neded to test it for a while.
I can survive with a crappy function generator (as i will at least see that its doing things it shouldnt) but i cant live with a crappy scope. I had my fun with a DS1052B and it was pretty sucktastic, got my old 9354L right out again even though its 10 times as huge, loud and horribly to use, but it doesnt BS me half of the time.
markone:

--- Quote from: robert_ on February 08, 2016, 09:34:27 pm ---Well, it stands next to a Waverunner HRO 66zi at the moment...

--- End quote ---

That's even weirder  :)

I touched one in demo years ago, if i remember right it was around 25Keuro LOL !

I think i understand why you out put all that effort in modding the HDG2002B, safety for your jewels mixed to some sort of personal challenge and self imposed punishment for china cr@p purchase.

Am i right ?
robert_:
Not really, the point is i dont need a very good FG. I used to live with an old Kontron (analog) one and a FG501 and a FG503(iirc) plugin in a TM504. Worked for what i do most of the time, just i wanted something digital with nice colours etc :) without spending too much on it, as it might have its frontend blown up at some time anyway. The good thing is that most low-end AFG use fairly replaceable parts there, while Agilent uses unobtanium hybrids. Other option would have been a SDG1025, which does suck a little less (we have a large box of these at work to replace our even crappier "Voltcraft" analog ones.
Also i did not pay anything even near the 25k for the HRO.
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