Display blinks on low trigger rate

Hi my name is Roni,

Device: DSO QUAD
Trigger mode:Normal
Time base: 20us

When I use it on “Normal” trigger mode, and input signal lower then 25Hz, the display blinks.
It seems like if a new trigger does not arrive, the display is cleared.
I work with a 10Hz signal, and I want to see a stable display.
Is there anything I can do ?

I will appreciate any help
Thank you,

Dear customer,

Might be the time domain problem, try to change it.
If still blinking, please provide more information, photo is the best.

Best regards,