Products > Test Equipment

Hantek DSO5102B - weird effects

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TinkeringSteve:
[UPDATE]

Appears to be fixed with newest firmware !

http://www.hantek.com/english/down_list.asp?unid=30



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Hi there,

I bought a DSO5102B scope a few weeks ago, now trying it out a bit, I encountered weird effects when both channels are on.
I'm aware that both channel have only half the sample rate then, but the scope will switch between resolution of measurement in ways that don't seem to make any sense, and you can't be sure what you're looking at, which makes the device useless.

(details in YT description boxes)

Look at this:
Here it just switches wildly between two settings, without me doing anything, as soon as CH2 is on (~ 2nd half of the vid).


and this:
Here, it apparently chooses lower rates for a certain time base range.


I wonder if anyone can reprouce this. I have the apparently newest firmware, 2.06.3 (110531.1).
If no one has encounetred this, and it#s not the firmware - could any sort of hardware fault cause this?? The box it came in showed heavy hits in one corner, no marks on the device, though.


EDIT:
-----
Some images to show setup:
http://img267.imageshack.us/img267/189/hantek15triggersetup.gif
http://img840.imageshack.us/img840/8282/hantek15ch1setup.gif
http://img802.imageshack.us/img802/9534/hantek15ch2setup.gif

Here's how it looks with bandlimit 20 MHz on:
http://img17.imageshack.us/img17/9216/hantek15bandlimited20mh.gif

...which is not exactly like what it's doing when the error occurs:
http://img257.imageshack.us/img257/9968/hantek15devicescrewupti.gif


Do any of you have experience with Hantek in cases such as this?
I mailed them about it perhaps a week ago, but haven't heard of them yet.


I hope someone can make sense of this
- TS

rf-loop:
" 2.06.3 (110531.1). " <-- this is far away from newest FW.

New FW is 110909.0

But can not fast imagine what is your problem becouse so fast you move something (or not) in video.

Do you mean it randomly changes itself  so that you do not touch anything and so that signal itself is routed also reliable to scope without any other possible error source.

(yes it is possible there is also HW problem. (bad soldering, bad relay or what ever, and also probe may fail if you use probe)

If you do selfcalibration, do it go ok?
If you use only single channel CH1 or CH2..  Same problem both channels.
If you use double channel mode. Look signal with CH1 or CH2. Both show same problem.
Look also that can you see any differencies between channels pulse shape.

What is your HW version?

Mailed to China (Hantek)? If so, please be patient becouse they just have been holiday. National Day (Oct. 1)
 3 days (Legal holiday = "minimum") Oct. 1 - 3
many business and offices follow this: Oct. 1  - 7
 

TinkeringSteve:

--- Quote ---New FW is 110909.0

--- End quote ---

Oh, I'll look into that! On their site they just stated "2.06.3" under nrewest firmware, I didn't look for the longer number until somebody today asked me for it in another forum.



--- Quote ---But can not fast imagine what is your problem becouse so fast you move something (or not) in video.
Do you mean it randomly changes itself  so that you do not touch anything and so that signal itself is routet also reliable to scope without any other possible error source.

--- End quote ---

In the part #1 video, I do not touch anything! the scope is doing this weird stuff on its own.
Only in part #2, I switch the time base every second or so.



--- Quote ---If you do selfcalibration, do it go ok?

--- End quote ---

Self-cal was reported as successful, but the problem persists.

TinkeringSteve:
I updated to FW 110909.0 - problem still there.

Spiro:
Looks like filter is kicking in randomly.

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