There is provided a method of source synchronous sampling, where a first clock signal of a first unit is synchronized to a second signal received from a second unit. The invention in particular relates to an integrated method for producing liquid fuels from a hydrocarbon stream provided by Fischer-Tropsch synthesis. The supporting device has at least one electromagnetic coil attended for arrangement on the vehicle and having a U-shaped yoke, which interacts with a U-shaped reaction rail intended for arrangement on the travel path. This approach can decrease time wasted by devices attempting unsuccessful transactions and can provide a commensurate increase in bus utilization.