H1008C, CH1 turns signs Upside down

Sihuhu

Dear Sir / Madam,

I observed an interesting thing. I tested the chanels of programmable generator (D0...D7) when I discovered that  CH1 turns upside down the measured sign:

I think it is a falulty or not?

amy

Sir, please check whether the CH1 is set to invert.

Sihuhu

Thank you I check it. I hope it solves the problem. Another interesting issue is the spikes that appear instead of squares. Is it normal?
These are the signs of programmable generator.

Thank you in advance for your answer.

amy

Yes, it's normal.

Sihuhu

Thank you for the aswers. (Your first answer helped me: CH1 was indeed in inverted position.)

Sihuhu

I have edited a new waveform. I follow the procedure to apply it as an output waveform,  but it does not appear correct as it should look like. Please see the image. How to solve this porblem?

amy

Do you want to say the problem is the phase of the two channels should be different