Hantek DSO5202BM: a malfunction of the trigger "Pulse".

Oleg10011001

Oscilloscope probe is attached to the built-in calibration generator(5V 1 Khz). In the menu "TRIG MENU" the trigger mode is switched to "Normal" mode. In the menu "TRIG MENU" change the trigger type to "Pulse" and then clicking on the second page of the menu with this type of the trigger settings are set to configure "PulseWidth" value of 500 us, and then start playing with the setting "When". When configuring the "When" enabled "=" (equal) or "<>" (not equal), then everything works fine. That is, in the "=" (equal to) the trigger permanently activated, and in the "<>" (not equal) the trigger is not activated. Malfunctioning the trigger is detected when the mode ">" - the trigger for some reason permanently activated...

P.S: Sorry my bad english.

amy

Dir sir,
Sorry, I don't understand what you mean.
Please describe again.

Oleg10011001

Trigger "Pulse" is not working correctly. Despite the set mode ">" this trigger occurs on pulses with a width equal to the one that has been specified in the settings, but must trip when they meet the pulses with a width of more than this.

P.S: Sorry my bad english.

amy

Oleg10011001 replied at 2016-6-28 15:17
Trigger "Pulse" is not working correctly. Despite the set mode ">" this trigger occurs on pulses wit ...

Dir sir,
Please check:

Oleg10011001

I think I understand the situation. In modes "=" (equal) and "<>" (not equal), the setting value "PulseWidth" it is not a specific value, but a range of about + -5% of the stated value. For example, we try to find pulses with a width of 500us, and get all the pulses with a width ranging from 477us to 527us... Maybe this the normal operation of the oscilloscope, and I just did not know that it features.

P.S: Sorry my bad english.

amy

Oleg10011001 replied at 2016-7-1 23:13
I think I understand the situation. In modes "=" (equal) and "" (not equal), the setting value "Puls ...

Dear, sir.
Yes, there is a deviation of about ±5% about the pluse width.