Measure time difference between two lines of logic Analyzer

[zakariarahman]

Hello, I am using two zero detector circuit in my design (to calculate the phase shift between two waveforms). The output of the zero detectors are connected to the logic analyzer of my VirtualBench. I already used the analog channels of the MSO to measure the phase shift which works perfectly. But since there are only two analog channels (which i will need for other meausrements) my supervisor suggested to use the  logic analyzer of the virtual bench to measure the phase shift between the two waveforms. I am using the following vi to get the measurement from the VirtualBench MSO. I get the digital waveform, Can anybody suggest how i can measure the time difference between the output waveform of the two zero detectors.

So I would like to measure the time difference, something like below: