how can i give output as a digital signal in labview

I'm trying to give output to a device named as "BNC-2120",as a digital signal using simulate signal as a source.

I'm getting right result on the waveform graph but I'm not getting any output on the oscilloscope (connected to BNC-2120).

please tell if any other information is required.

 I have connected the oscilloscope with labview using  P(0.0)

Thanks.