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

--- Quote from: IanJ on June 10, 2014, 08:10:48 pm ---
--- Quote from: fremen67 on June 10, 2014, 08:07:14 pm ---
--- Quote from: IanJ on June 10, 2014, 08:03:23 pm ---1.00.2(140422.0) here as purchased.

--- End quote ---
Thank you Ian for the information. What version of FPGA do you have?

--- End quote ---

Software = 1.00.2(140422.0)
Kernel = 3.2.35
FPGA = 12
Keyb = 1

Ian.

--- End quote ---

I seem to have the same version firmware as Ian.

I finally got my DS1074Z so I could do some scoping around with my Hantek. One thing I had a friend mention is that there is an issue that if you adjust the offset on a waveform it will output MAX voltage (!!) for a period of time before switching to the correct waveform. I'm not sure if this was mentioned here but this bears mentioning again so no one will fry anything with it. Attached is a scope shot from changing 500mV sine wave from 0V offset to 1V offset.
fremen67:

--- Quote from: Dago on June 17, 2014, 03:50:12 pm ---One thing I had a friend mention is that there is an issue that if you adjust the offset on a waveform it will output MAX voltage (!!) for a period of time before switching to the correct waveform. I'm not sure if this was mentioned here but this bears mentioning again so no one will fry anything with it. Attached is a scope shot from changing 500mV sine wave from 0V offset to 1V offset.

--- End quote ---
You are right there is an issue. The HDG seems to have 3 output working ranges (you can here relays when it changes).
One range is about +/- 0.58v, the 2nd one is up to +/- 2.25V and the 3rd one is up to +/- 10V.
I did some tests and this is what I saw:
When you change a value (amp or offset) which makes the output signal cross a range limit, then you can see this bug:
- if you go from a range to a higher one, the amp of the signal will be the max value of the new range for a while
- if you go from a range to a lower one, the amp of the signal will be reduced (100mv or 500mv) for a while
Can someone confirm?

In your case Dago, you went from range 1 (<580mv)  to range 2 (580mv to 2.25V) so you saw a signal with an amp of 2.25V. Is that right?
Dago:

--- Quote from: fremen67 on June 17, 2014, 08:31:01 pm ---In your case Dago, you went from range 1 (<580mv)  to range 2 (580mv to 2.25V) so you saw a signal with an amp of 2.25V. Is that right?

--- End quote ---

Yup this seems to be the case. It *should* shutdown the output if this cannot be avoided for the time being...

Does anyone know what MCU/CPU they are using? I always naturally start thinking about "hmm, maybe write my own firmware..." :-DD
idpromnut:
Quick update; I finally got around to adding the missing bits of hardware into my AWG last night, but lo and behold, I can't switch the counter to HF mode in the firmware… I will double check again tonight that I still have the model upgrade modification (I may have reverted it to try and do some backups/restore and forgot about it).

Also, I don't know if the ethernet is supposed to work on all models. but mine did not work after adding the controller, magnetics and RJ45 jack. Again, this could be stupid stuff on my part so I need to check and verify that tonight as well. Forgot the crystal  :palm:

Cheers!
idpromnut:
Hacker's log, supplemental: so in the end, the network interface lights up and all seems well with that bit. The HF counter DOES indeed work, as tested to 2.1Ghz via my HP8642B: 2 100 037 590.707 Hz (and that is using the stock XO in the AWG, and the OCXO option in my HP8642B).  So that seems to work a treat.

The other interesting thing I found while snooping around the AWG's filesystem is this when I inadvertently rebooted the AWG with a FAT32 formatted SD card still in:

--- Code: ---##### EmbedSky BIOS for SKY2416/TQ2416 #####
This Board: SDRAM is 64MB; LCD display size is: 800 X 480
Press Space key to Download Mode.!

--- End code ---

And then after a minute this pops up, again, no input via the console or anything, just left it do it's own thing:

--- Code: ---error found: 0010

--- End code ---

And the AWG does not boot further. So this makes me pretty sure that there is a way to at least "externally" boot the HDG2000 series via a SD card if we have the correct FS etc on it.

AH HA!  And there is MORE!  If I am a good little boy and follow the nice machine's instructions, I get THIS!:


--- Code: ---#####    Boot for SKY2416/TQ2416 Main Menu      #####
#####     EmbedSky USB download mode     #####

[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash
[2] Download Eboot (eboot.nb0) to Nand Flash
[3] Download Linux Kernel (zImage.bin) to Nand Flash
[4] Download LOGO Picture (logo.bin) to Nand  Flash
[5] Download UBIFS image (root.ubi) to Nand Flash
[6] Download YAFFS image (root.bin) to Nand Flash
[7] Download Program to SDRAM and Run it
[8] Boot the system
[9] Format the Nand Flash
[0] Set the boot parameters
[a] Download User Program
[n] Enter TFTP download mode menu
[r] Reboot u-boot
[t] Test Linux Image (zImage)
Enter your selection:

--- End code ---

 8)  Cool.  The two are not related of course, because you get the same "hold Space to download" prompt even without the SD card in the front.
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