An entry adapter for a cable television (CATV) network includes a first signal separation device configured to separate downstream CATV signals into a first downstream high-frequency signal and a first downstream low-frequency signal based on a first cutoff frequency, a second signal separation device configured to separate the downstream CATV signals into a second downstream high-frequency signal and a second downstream low-frequency signal based on a second cutoff frequency, and a signal frequency sensor and selector device in selective communication with the first and second signal separation devices.