(OMTs, Dual-Band LNBs) Orthomode transducers (OMTs) can simultaneously detect both vertically and horizontally polarized signals. Such devices are commonly found in commercial C-band installations such as satellite master antenna and cable television headends because they allow reception of all satellite transponders at one time.other variety of feed designed to simultaneously detect both polarities, a dual LNB/feed, has no waveguide section but instead has two independent probes and two LNBs built into one housing. It is designed so each probe/LNB detects signals of only one polarity.