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[使用心得] 1.22 trigger bug chart

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发表于 2019-8-7 06:45:49 | 显示全部楼层 |阅读模式
本帖最后由 yclee126 于 2019-8-8 02:12 编辑

The firmware is buggy, but still there is no other choice yet..
Instead of just waiting for eternally, I thought this chart would be useful for (at least)avoiding trigger bugs.

I measured this with square wave signal, but as it turns out the bug depends on idling trigger time.(the time it waits for the next trigger signal)
The chart is idling trigger time versus time scale.
I've tried to scroll the screen while in hold state, but it only returned wrong waveform.

Trigger position : Second leftmost
(Moving the trigger position to the right causes more defect combos inward the chart)
"defect" means the waveform is distorted on norm trigger screen or disappears on single trigger screen.
x = norm, single defect
* = norm defect
time
freq
100ns
200ns
500ns
1us
2us
5us
10us
20us
50us
100us
200us
500us
1ms
2ms
5ms
10ms
20ms
50ms
100ms
200ms
500ms
1s
125ns8MHz








x
xxxx
166.7ns6MHz








x
xxxx
250ns4MHz








x
xxxx
500ns2MHz








x
xxxx
1us1MHz









x
xxxx
2us500kHz








x
xxxx
5us200kHz










x
x
10us100kHz










x
x
20us50kHz










x
x
50us20kHz
x











100us10kHz
x
x
x










200us5kHz
x
x
x
x










500us2kHz
x
x
x
x
x









1ms1kHz
x
x
x
x
x
x









2ms500Hzxxxx
x
x
x








5ms200Hzxxxxxxxx







10ms100Hzxxxxxxxx
x







20ms50Hzxxxxxxxxxx






50ms20Hzxxxxxxxxxx
x






100ms10Hzxxxxxxxxxxxx
*





1s1Hzxxxxxxxxxxxx
x
x
x
*
*
*
*
*


inf.s1Pulsexxxxxxxxxxxxxxxxxxxxxx

Note that those large time scales on the single pulse row take some idle time to take defect, but it really happens.
That means within short time of idling trigger time, the chance it will get triggered increases.
My technique here to get it triggered is to push K1 first from the hold state, then quickly trigger the signal source with the other hand.


haha..
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发表于 2019-8-7 22:38:43 | 显示全部楼层
yclee126,

I'm not sure I understand your chart.  Are you providing a single shot pulse using single shot trigger? Based on your chart is it showing that 8MHz-500kHz pulses trigger properly with time scale of 100ns to 20ms.  However, I see the exact opposite.  I only get a single mode trigger to work with time scale > 20ms.

And if you are saying that you can avoid trigger bug by quickly pushing K1 and then quickly sending signal, I agree I can get that to work, too.  But my real applications don't have an option to define when I send my signal.

I hope we don't have to wait eternally for the fix!!

Note to miniDSO.... Can you put this bug as a very high priority?  It really is a useless tool until the trigger works.
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 楼主| 发表于 2019-8-8 01:27:10 | 显示全部楼层
caykroyd 发表于 2019-8-7 22:38
yclee126,

I'm not sure I understand your chart.  Are you providing a single shot pulse using single ...

I did this with square wave signal and normal mode rising edge trigger. Only the bottom row is a single pulse.(single rising edge to be exact)
The trigger bug depends on idling trigger time, so maybe that's why you got it work on those slow time base with more idling trigger time "tolerance".

Yes indeed the tecnique here is useless to trigger on irregular pulse, but it has some applications like microcontroller debugging.
It's a temporary solution to avoid it, they shoud fix it asap seriously.

And I just found this chart is misleading thanks to your reply!
I'll add cycle time next to those frequency numbers.
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发表于 2019-8-8 09:16:55 | 显示全部楼层
caykroyd 发表于 2019-8-7 22:38
yclee126,

I'm not sure I understand your chart.  Are you providing a single shot pulse using single ...

Thank you!
We are work on the new firmware, And will fix this bug.
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发表于 2020-1-25 23:38:42 | 显示全部楼层
本帖最后由 Kabron 于 2020-1-25 23:41 编辑
minidso posted on 2019-8-8 09:16
Thank you!
We are work on the new firmware, And will fix this bug.

You spent almost half a year!
When the result will be?The device soon will be morally expired

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发表于 2020-3-4 04:02:26 来自手机 | 显示全部楼层
Any updates on the fixed version?
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发表于 2020-3-4 09:13:12 | 显示全部楼层
davidos 发表于 2020-3-4 04:02
Any updates on the fixed version?

we have made more than 90% progress in bug repair of FPGA. The new upgrade firmware will now be released after the A / D has been repaired. It is expected to be within one month.
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发表于 2020-3-12 16:06:09 | 显示全部楼层
Already fix the bug, Please download APP 2.14 here:
http://www.minidso.com/forum.php?mod=viewthread&tid=3357
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