Multimedia-capable BK amplifier for small to medium-sized building units and CATV home networks with active return channel. All on board: All important functional units are fully integrated on the circuit board. Forward frequency range 40/85-862 MHz, active return channel 5-65 MHz, return channel on/off/active/passive, ARA: automatic return channel switch-off when not in use, optional. Return channel gain 32 dB. Rotary switch in 1 dB steps for attenuation and line equalization (0-15 dB, RC 0/10 dB), Interstage: jumper for attenuation and line equalization (forward + backward), integrated test sockets. For multimedia-capable CATV/BK networks with active (passive) return path, future-proof 1 GHz technology, rotary switch for setting the attenuation and equalization in 1 dB steps, all-on-board: no modules and plug-in pads required, basic gain of the return path can be reduced by 6 dB without affecting noise and control capability, VHF band I operation can be activated by switching off the return path, particularly economical thanks to highly efficient, durable and energy-saving switching power supply, high-quality F-connectors for secure contact and thus ingress and LTE protection, test sockets on input and output, extensive ESD/overvoltage protection.