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Review: Hantek DDS 3X25. Anyone own one?

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torch:

--- Quote from: Mechatrommer on August 09, 2011, 08:13:55 pm ---
--- End quote ---
thats very bad! have you tried changing screen resolution? [/quote]

Ok, I've tried every available screen resolution from down to 800x600. Same thing, only larger and fuzzier.


--- Quote ---try removing *.rgn files and see what happened?
--- End quote ---

Renamed them all to .bak and its better -- sort of. See the screenshot below. Basically now I have two images overlaying each other. The larger one works and now I can tell which button to click. I think before, the area that had to be clicked had shifted, even if the button image had not.


--- Quote ---sorry it happened to you.
--- End quote ---

I demand a refund! I was overcharged for this piece of ALPHA test software!  :'(

 ;D

Edit: I forgot to attach the screenshot.  ::)

torch:
Ok, I figured out what is happening. I have the windows system fonts set to "Larger scale" (120 dpi) instead of the default scale (96 DPI). (My arms are getting too short to read this hi-res screen :( ) If I change it to 96 DPI then the two images overlap properly and the mouse clicks the sweet spots. In other words, I can't see what I'm clicking, but now I can click on it!  ;D

torch:
I've managed to crash it:

"The exception Privileged instruction.
(oxc00000096) occurred in the application at location 0x00248da6.

Click on OK to terminate the program"

I was playing around with the sweep function.
Sine wave, 50MHz to 100MHz, 500ms, Cyclic.
Impedance:10MOhm
Stable Synch:On
Force Clock: Off
Signal Boost On
Flatness Ctrl. Off
Flatness BW: 10MHz
Phase Profile: phase3x25
Signal Profile: profile3x25
Beep On Comm: Off

This all worked OK.

Then I used the utility to switch Flatness Ctrl. to On and switched back to sweep. Start and Stop changed to 10MHz automatically.

I hit "Run" and it ran for about 2 seconds before crashing.


torch:

--- Quote from: marmad on August 07, 2011, 11:23:53 pm ---@torch (bug fix):


--- Quote ---Hmm... I couldn't replicate this either. If I try to "Reset All" without a config file (the software looks for a folder in it's folder called "cfg" [where you can save different setting configuration files; e.g. "logsweep_10Hz_40kHz.cfg"] for a file called "default.cfg").  If it doesn't find that file, I get the message "Configuration file not found", but no crash.  But I've now changed the code to use the default start-up settings as an alternative - so maybe that will prevent your crash.  Please give it another try when you can.
--- End quote ---

Ok, "Reset All" now produces the error message:

"Run-time error '-2147024770 (8007007e)':
Automation error
The specified module could not be found."

Click "Ok" and the program closes.




--- Quote ---Wow! Nicely spotted bug! I've now changed the formula to my latest - to correctly display the actual output frequency for all entered frequencies.
--- End quote ---

Yup, that's fixed.

It is still producing that AM pattern in a high-frequency sweep (similar to Mecha's "Radio" pattern). It's particularly noticeable if sweeping above about 75MHz up. EG: there is a 3.4kHz modulation overlaid on the 100MHz base frequency when as it sweeps from 75MHz to 100MHz. However, the pattern is considerably different if one sweeps from 100MHz to 100MHz. The modulation drops to 1.7 kHz and is sinusoidal. Weird. I wonder if it's a result of the frequency transitions -- I notice they are much longer in this version than in the previous version at lower frequencies and  there is a noticeable spike at each transition.


--- End quote ---

marmad:

--- Quote ---Ok, "Reset All" now produces the error message:

"Run-time error '-2147024770 (8007007e)':
Automation error
The specified module could not be found."

Click "Ok" and the program closes.
--- End quote ---

Thanks, torch!  I'll look into that later in the week.  Keep up the good work revealing our pathetic mistakes  ;)

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