Provided are a method, system, and program for restoring a source file referenced by multiple file names to a restore file. The controller generates n kinds of waveforms used to eject different amounts of ink from the nozzles ). The method in the present invention allows the network elements to be able to automatically select the optimal routing clock, forbid non-optimal routing clocks to participate in the selection, and effectively prevent the clocks from looping. The ranging processor may generate a range estimate between the first and second wireless units, and generate an estimated operating frequency for the NFE wireless transmitter based upon the range estimate.