The diplexer is a different device than a passive combiner or splitter. A power combiner is simply a power splitter used in reverse. Maximum-ratio combining is the optimum combiner for independent additive white Gaussian noise channels. The combiner performs a mathematical subtraction on the electrical signals arriving from the feedhorns. Three free-flying satellites would operate together;a beam combiner and two siderostats. The ports of a diplexer are frequency selective; the ports of a combiner are not. At one point, Bumblebee shoots at Infernocus, a Decepticon combiner, and is shot down. The five eggs and their parts also have a combiner mode. The second is to have a small combiner that is separate from the windshield. Most of these were G1 combiner team recolors or recolors of recent figures. IDW had previously published crossover events based on Combiner Wars and Titans Return. On July 25, 2008, WHIZ was knocked off the air when its power combiner failed. The two combiner teams battled, with Bruticus beating Defensor. G.O.A.T. (combiner two version) Certifications Gold from RIAA.