The E4868A module is supplied with 16 x 2.375 Gb/s - 2.7 Gb/s differential data D0 - D15). It can work with internal clock (to be wired from E4808A to the MCLK connector) or with an external clock to the external clock input. There are three subrate clock outputs providing a 20 and 10 GHz clock signal and a 2.7GHz / 675MHz signal. Any performance should be based on the 10GHz / 20GHz clock outputs only. The data output multiplexes the data supplied at D0 - D15 is a cyclical form.