Display on oscilloscope shows two identical waveforms

[applesilk]

Hi All,




I am trying to output two saw-tooth signals with different frequency. However, on my oscilloscope. I got two identical waves (same frequency at 4KHz and same amplitude)..

look at the front panel, t0 of "Y signal out" elapse very fast but t0 of "X signal out" elapse very slow..

The DAQ assistant is configured with 2 analog output channels ..

Any one can help? Thanks.

Charlie

[applesilk]

My vi attached....

[applesilk]

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