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DSO4254C - Displaying waveform problem

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Post time 2019-8-7 03:17:43 | Show all posts |Read mode
Hi Amy

Waveform is not displayed correctly.

1 - AWG settigs: Wave: Square, Frequency 1 kHz, Amplitude 1.6 V, Duty 1, Modulation, Burst OFF
2 - Triger Edge, Slope Falling, Mode Normal, Hold of 1 us
3 - CH1 Time base 5 ms/DIV, 200 mV/DIV

SW 1.1.2(190802.0)
FPGA a005

Green arrow - waveform is displayed correctly
Red arrow - here waveform is missing
Blue arrow - here should be possitive pulse

Triger seems to be working correctly because distance between triger place and pulses corespond to signal period. I think that only waveform is not displayed correctly. This is not stable situation. Every cycle waveform is displayed in different places. This problem is observed for short pulses.
Switching between vectors and dots mode doesn't solve problem in main waveform window but in zoom window dots appears (this sugest that this is only displaying problem).

The observer could assume that singnal is not exist in red area but why is trigered ;)

Waveform should be displayed correctly and also in zoom mode should be visible triger reason.

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