Thank you sir, but how do I calculate Q factor from the given parameters without a eye diagram? I mean the equation you have provided calculates the q factor from the opening of a measured eye diagram, but I would like to find out an equation that calculates Q factor strictly with the parameters i have given above and without an eye diagram. This will then help me compare if my calculated result of the q factor is equal to the result i get from the q factor calculated from the opening of the eye diagram.