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Hantek HDG2002B AWG: 5Mhz or 100MHz? Let's see!

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Dago:
Has anyone had any problems modding their Hantek?

I've had it for ages but haven't had the need for higher frequencies so I haven't modded it yet. Now I'd need a sine up to 100 MHz so I started modding it but I'm having trouble getting the UART to work. I found the pinout for the connector (next to the USB-connector at the backside) and that the settings for the UART is 115200baud, 8N1, no parity, no flow control. With these settings the it "appears" to work in the sense that when I boot the thing I get a couple of pages worth of something. But everything coming from the scope is just a garbled mess (nothing seems to make any sense, lots of characters are just grey boxes etc.). Pressing keys results in 1-30 characters printed in the terminal (I'm using putty btw.). I just have a short piece (~10cm) of ribbon cable connecting to my (genuine) FT232 UART adapter. Any ideas what could be wrong?

Edit: Figured it out, for some reason on the adapter I have the "Invert TXD" and "Invert RXD" options were set when looking at the adapter settings with ft_prog. Changed them and now it works (had to replug the adapter).

fremen67:

--- Quote from: markone on March 16, 2015, 11:54:26 pm ---I'm a cold war boy used to code in plain C language on embedded systems, with good memories for Z80 & 80C31 & AD2101DSP assembler works till the middle of 90s :-)

--- End quote ---
I think I still have somewhere in a box the ZX81 I bought in 81 with the impressive 16ko external RAM module  ;)


--- Quote from: markone on March 16, 2015, 11:54:26 pm ---Anyway i just noticed a DS1074 problem :

with one channel in use fine trimming the vertical sensitivity to 335mV/div or less (channel set to 1X), signals over about  30Mhz becomes significantly distorted at least on the screen.

I saw that during script calibration and i checked it manually after, discovering also that if you enable other channels the distortion disappear  :wtf:

See the attached screenshots, 2Vpp sine 90Mhz signal, 340mV/div (signal good), 335mV/div (signal distorted one channel in use), 335mV/div (signal good two channel in use), all with coax cable and 1X probe ratio.

--- End quote ---
Yes, I can reproduce it too on my DS1054Z. You can hear a relay clicking when the signal gets distorded... strange indeed


--- Quote from: markone on March 19, 2015, 12:33:02 pm ---Just discovered also that AM modulation is now broken (SW 1.0.0.3), see attached image.

It would be a 10Mhz 100% AM modulated signal,  (@10Khz), but as you can see, the deepness is wrong, sure not 100%.

--- End quote ---
Yes I can reproduce it too. But it seems to be OK for signals that don't use the x4 or x5 amplification stages, that is under 1 Vpp. As the way the x4 and x5 amplifiers are used has been modified in the 1.00.3, I would guess that they did not retest al the functions. Or may be the 1.00.3 is supposed to be used with FPGA 30 only...
It is becoming really annoying, and still no official updates on Hantek website.

fremen67:

--- Quote from: Dago on March 22, 2015, 02:15:44 pm ---I've had it for ages but haven't had the need for higher frequencies so I haven't modded it yet. Now I'd need a sine up to 100 MHz so I started modding it
--- End quote ---
Nice that it works now. Remenber that after the mod you will have to calibrate the HDG to get it working above 30Mhz...

fremen67:
So I finally received my 34401A  :)
Here is the modified version of the HDG calibration tool with:
- Excel x64 support (thank you smgvbest for the feedback)
- 34401A DMM support for DC values
- Rigol DS/MSO2000A support thanks to flatlander
- Excel sheet update improvement

If you don't want to use a device (DMM or DSO), just leave the adresss/alias empty.
The DSO detection type is done using the IDN string so it should be able to detect a DS/MSO1000Z and DS/MSO2000A (hopefully :P).
Depending on the calibration value type, you should be prompted to connect the correct device to the HDG.

I also wanted to add a progress status bar but it's bed time here ...
Hope this will help!

rosasharn:
Thanks fremen67!
I'll download and try on my HDG.   ^-^

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