How to design a digital switch in order to modulate an analogue carrier?

[cantondv]

Hi,

I am struggling with something that, I think, might be simple. I am programming a digital modulator. It multiplies an analogue waveform (carrier) by 1 or -1 according with the value in the digital signal.

Thus, how to design a digital switch using a digital waveform? 

I have tried to use Numeric and Boolean functions, but I am getting constant errors due to data type incompatibilities (broken wire).

Many thanks,
Dave

[crossrulz]

MInd showing us your code?

You might have to use a FOR loop to process your data.