Electronic Engineer Discuss

Title: DSO4102c Error displaying the trigger. [Print this page]

Author: pavlenkoa Time: 2020-4-16 23:26
Title: DSO4102c Error displaying the trigger.
At any frequency, when switching the sweep, there is a delay in the display of the signal by 550 ns from the trigger line to the sweep value of 2 μs. Further switching from 800 ns or less eliminates the error.
[attach]3505[/attach]

[attach]3506[/attach]

[attach]3507[/attach]

[attach]3508[/attach]

[attach]3509[/attach]
It can be seen that after 800 ns - everything is perfect.
I hope for an answer. Thanks in advance.

Author: wangshuang Time: 2020-4-20 16:56
Please perform self-calibration, disconnect all probes and cables from CH1, CH2 and EXT.TRIG.

Author: pavlenkoa Time: 2020-4-20 23:22
Edited by pavlenkoa at 2020-4-20 23:23

wangshuang replied at 2020-4-20 16:56
Please perform self-calibration, disconnect all probes and cables from CH1, CH2 and EXT.TRIG.

This is the first thing I have done. Plus reset all settings to default. This occurs on both channels equally and independently of the frequency of the input signal.

Model: DSO4102C
sw version: 3.50.0(200410.0)
hw version: 1020xffffa000
serial number: T 1G/049 006360
boot count: 113
upgrade count: 2
lcd.front.ts: 3.0.0

Author: wangshuang Time: 2020-4-26 16:51
I have feedback your problem to the engineer, I will reply you after processing.

Author: FSC Time: 2020-4-30 21:06
Hi,
I observed exactly the same behaviour on my DSO4072: At 20us timebase everything is ok. But then from 8us down to 2us I have this offset. And at 800ns everything is fine again. Seems that the "one digit us timebase" have a problem...

Author: pavlenkoa Time: 2020-5-1 02:49

FSC replied at 2020-4-30 21:06
Hi,
I observed exactly the same behaviour on my DSO4072: At 20us timebase everything is ok. But then ...

want to upset you, but the same picture is observed at 20 us, if you only increase it ...

[attach]3552[/attach]

Надеюсь инженеры исправят эту системную ошибку.
I hope the engineers fix this system error.

Author: wangshuang Time: 2020-5-12 09:51

pavlenkoa replied at 2020-5-1 02:49
want to upset you, but the same picture is observed at 20 us, if you only increase it ...

Please take a photo of System Information: Utility->F1.

Author: wangshuang Time: 2020-5-12 14:28

Please use this firmware to try:
https://fil.email/vDsqXuI8

Author: pavlenkoa Time: 2020-5-12 23:50

wangshuang replied at 2020-5-12 14:28
Please use this firmware to try:
https://fil.email/vDsqXuI8

Thank you so much! Installed the update. Here are the results:
In normal mode, everything returned to normal. Many thanks.
Now there is no delay.

[attach]3569[/attach]

[attach]3570[/attach]

But in dual-window mode, the fault remained. Nothing changed. Perhaps you need some more where to modify the software. Thanks for the support!

[attach]3571[/attach]

[attach]3572[/attach]

Author: pavlenkoa Time: 2020-5-13 03:19
Here is another supplement. The error disappeared with a memory depth of 4k. With a memory depth of 20k and 40k, it remained!

[attach]3573[/attach]

[attach]3574[/attach]

[attach]3575[/attach]

[attach]3575[/attach]

Author: wangshuang Time: 2020-5-20 10:42
The problem has been fed back to the engineer, I will let you know if there is new firmware.

Author: wangshuang Time: 2020-5-21 11:24

pavlenkoa replied at 2020-5-13 03:19
Here is another supplement. The error disappeared with a memory depth of 4k. With a memory depth of ...

Please use this new firmware to do measurement.
https://fil.email/jxaDYmuA

Author: pavlenkoa Time: 2020-5-21 17:19
Thank ! Works fine. Problem resolved

Welcome to Electronic Engineer Discuss (https://eediscuss.com/)