how to create 2 output signal locked in phase from a one input signal

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Hi all,

 

I have a case in which I want read in a signal analog input (voltage) from a photodiode, I want to create a 2 sinewave signal locked in with same phase as the input signal and output them as analog output to my 2 laser diode. the frequency of the input signal is low aroud 15 Hz , the 2 output signal i want to be  around 120 hz and 150 hz . 

I am using USB - 6003 daq card.

I have created a vi to see the input signal but I dnt know how to create 2 signal from the waveform generator locked in the phase same  as the input signal. I have seen a PLL vi , but dont know how to use that with my program.

can any one tell me how to proceed.

 

thanks