An optical data transmitter is described that includes a precoder that converts an input data signal to a binary precoded data signal and to a complementary binary precoded data signal. The mapping describes a relationship between a primary device and at least one device of the plurality of devices. Assigning a maximum transmission power for the first carrier so as not to exceed a transmission power for the second carrier is also included. These Test Runner Processes may be spread out over various hosts. The magnetic brush rubs the image carrier to thereby develop a latent image formed on the image carrier.